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Research brief · Environmental Science & Technology · 2024

Reclaimed water for
electrolytic hydrogen.

Hydrogen plants need clean water. Nearby wastewater treatment facilities could supply it—after further treatment—and reduce the need for freshwater.

Jinyue Jiang, Lin Du, Jun-Jie Zhu, Anthony Y. Ku & Zhiyong Jason Ren

Read the paper ↗

01 / The connection

A treatment plant becomes a water supplier.

A water resource recovery facility (WRRF) treats wastewater before reuse or discharge. The study asks which facilities could supply reclaimed water to hydrogen users at a lower combined cost than conventional water supply. [1, 2]

01

WRRF

Treated effluent

02

Water supply

Pipeline, pumping
& advanced treatment

03

Electrolysis

Clean electricity + water
→ hydrogen + oxygen

Oxygen for wastewater aeration · a proposed return benefit
Conceptual connection, not a plant design. Reclaimed effluent still needs treatment to meet end-use water quality. Oxygen reuse is a future opportunity, not an established part of the reported savings. [1, 2]

02 / Water demand

More than the water split into hydrogen.

The reaction itself requires about 9 kg of water per kg of hydrogen. The study assumes 10 kg of electrolyzer feedwater, plus water lost during purification and 19.5 kg for cooling. At its 66% treatment-recovery assumption, that adds up to about 34.7 kg of source water. [2]

Adjust treatment recovery to see how the water balance changes. This is an illustration of the study’s equation; it does not rerun the national optimization.

Equation and assumptions

Source water = 10 ÷ recovery fraction + 19.5, in kg H₂O per kg H₂. Treatment loss = 10 ÷ recovery fraction − 10. Cooling demand stays fixed here. Actual reclaimed flow is also capped by the WRRF’s available flow (Supporting Information, eq S2). The slider is an illustrative sensitivity range.

66%
50%95%

34.7kg water / kg hydrogen

Electrolyzer feed
10.0 kg
Treatment loss
5.2 kg
Cooling
19.5 kg
Study assumption: 66% treatment recovery.

03 / Geography

Renewable power and water are not always in the same place.

Compare county-level solar-and-wind hydrogen potential with projected water stress in the original watershed polygons. Both maps use the same geographic projection. These are contextual data, not the model’s optimized WRRF–hydrogen pairs.

Hydrogen potential · countiesWater stress · watersheds
Watershed 771806 — Arid and low water useWatershed 771960 — Extremely high (>80%)Watershed 771980 — Arid and low water useWatershed 771990 — Extremely high (>80%)Watershed 772100 — High (40-80%)Watershed 772211 — Low (<10%)Watershed 772310 — Low-medium (10-20%)Watershed 772213 — Extremely high (>80%)Watershed 772212 — Arid and low water useWatershed 772330 — Low (<10%)Watershed 772320 — Low (<10%)Watershed 772214 — Extremely high (>80%)Watershed 772215 — Extremely high (>80%)Watershed 772217 — High (40-80%)Watershed 772216 — Extremely high (>80%)Watershed 772218 — Extremely high (>80%)Watershed 772219 — Low (<10%)Watershed 772221 — Extremely high (>80%)Watershed 772230 — Low-medium (10-20%)Watershed 772250 — Extremely high (>80%)Watershed 772240 — Extremely high (>80%)Watershed 772222 — Low (<10%)Watershed 772223 — Medium-high (20-40%)Watershed 772270 — Extremely high (>80%)Watershed 772260 — Extremely high (>80%)Watershed 772350 — Low (<10%)Watershed 772341 — Low (<10%)Watershed 772225 — Low-medium (10-20%)Watershed 772224 — Medium-high (20-40%)Watershed 772343 — Low (<10%)Watershed 772342 — Extremely high (>80%)Watershed 772227 — Extremely high (>80%)Watershed 772226 — Low (<10%)Watershed 772344 — Arid and low water useWatershed 772345 — No dataWatershed 772347 — Arid and low water useWatershed 772346 — Extremely high (>80%)Watershed 772228 — Arid and low water useWatershed 772229 — Arid and low water useWatershed 772290 — Arid and low water useWatershed 772280 — Low-medium (10-20%)Watershed 772370 — Low (<10%)Watershed 772360 — Arid and low water useWatershed 772390 — Low (<10%)Watershed 772380 — Arid and low water useWatershed 772349 — Arid and low water useWatershed 772348 — Arid and low water useWatershed 772401 — Low (<10%)Watershed 772500 — Low (<10%)Watershed 772403 — Medium-high (20-40%)Watershed 772402 — Arid and low water useWatershed 772405 — Arid and low water useWatershed 772404 — Medium-high (20-40%)Watershed 772601 — Low (<10%)Watershed 772700 — Low (<10%)Watershed 772407 — High (40-80%)Watershed 772406 — Extremely high (>80%)Watershed 772408 — Arid and low water useWatershed 772409 — Arid and low water useWatershed 772602 — Arid and low water useWatershed 772603 — Medium-high (20-40%)Watershed 772801 — Low (<10%)Watershed 772910 — Low (<10%)Watershed 772604 — Low (<10%)Watershed 772605 — Low-medium (10-20%)Watershed 772802 — Low (<10%)Watershed 772803 — Low (<10%)Watershed 772606 — Medium-high (20-40%)Watershed 772607 — Low-medium (10-20%)Watershed 772609 — Low-medium (10-20%)Watershed 772608 — Low (<10%)Watershed 772805 — Low (<10%)Watershed 772804 — Medium-high (20-40%)Watershed 772920 — Low-medium (10-20%)Watershed 772930 — No dataWatershed 772940 — High (40-80%)Watershed 772950 — Low (<10%)Watershed 772806 — Low-medium (10-20%)Watershed 772807 — Low (<10%)Watershed 772808 — Low (<10%)Watershed 772809 — Low-medium (10-20%)Watershed 772970 — Low (<10%)Watershed 772960 — Low-medium (10-20%)Watershed 772990 — Medium-high (20-40%)Watershed 772980 — Low-medium (10-20%)Watershed 774139 — High (40-80%)Watershed 774140 — Extremely high (>80%)Watershed 774150 — Extremely high (>80%)Watershed 774160 — Extremely high (>80%)Watershed 774170 — Extremely high (>80%)Watershed 774180 — High (40-80%)Watershed 774190 — High (40-80%)Watershed 774200 — Extremely high (>80%)Watershed 774300 — Low-medium (10-20%)Watershed 774410 — Low (<10%)Watershed 774430 — Medium-high (20-40%)Watershed 774421 — Extremely high (>80%)Watershed 774422 — Low-medium (10-20%)Watershed 774423 — Extremely high (>80%)Watershed 774440 — Medium-high (20-40%)Watershed 774450 — Medium-high (20-40%)Watershed 774425 — High (40-80%)Watershed 774424 — Medium-high (20-40%)Watershed 774470 — Low (<10%)Watershed 774460 — Low-medium (10-20%)Watershed 774491 — High (40-80%)Watershed 774480 — High (40-80%)Watershed 774426 — Medium-high (20-40%)Watershed 774427 — Extremely high (>80%)Watershed 774428 — Extremely high (>80%)Watershed 774429 — Extremely high (>80%)Watershed 774493 — Medium-high (20-40%)Watershed 774492 — Medium-high (20-40%)Watershed 774494 — Low (<10%)Watershed 774495 — Low-medium (10-20%)Watershed 774497 — Low (<10%)Watershed 774496 — Low (<10%)Watershed 774498 — Low-medium (10-20%)Watershed 774499 — Extremely high (>80%)Watershed 774500 — Medium-high (20-40%)Watershed 774600 — Low (<10%)Watershed 774700 — Low (<10%)Watershed 774801 — Low (<10%)Watershed 774803 — Low (<10%)Watershed 774802 — Low (<10%)Watershed 774804 — Medium-high (20-40%)Watershed 774805 — Low (<10%)Watershed 774807 — Low (<10%)Watershed 774806 — High (40-80%)Watershed 774809 — Low (<10%)Watershed 774808 — Low (<10%)Watershed 774900 — Low (<10%)Watershed 781001 — Low (<10%)Watershed 781002 — Low (<10%)Watershed 781003 — Low (<10%)Watershed 781004 — Low (<10%)Watershed 781005 — Low (<10%)Watershed 781006 — Low (<10%)Watershed 781007 — Low (<10%)Watershed 781008 — Low (<10%)Watershed 781009 — Low (<10%)Watershed 782100 — Low (<10%)Watershed 782300 — Low (<10%)Watershed 782200 — Low (<10%)Watershed 782501 — Low (<10%)Watershed 782400 — Medium-high (20-40%)Watershed 782503 — Low (<10%)Watershed 782502 — Low (<10%)Watershed 782505 — Low (<10%)Watershed 782504 — Extremely high (>80%)Watershed 782506 — Extremely high (>80%)Watershed 782507 — Low (<10%)Watershed 782509 — Low (<10%)Watershed 782508 — Extremely high (>80%)Watershed 782611 — Low (<10%)Watershed 782701 — Low (<10%)Watershed 782613 — Low (<10%)Watershed 782612 — Low (<10%)Watershed 782703 — No dataWatershed 782702 — Low (<10%)Watershed 782705 — Low (<10%)Watershed 782704 — Low (<10%)Watershed 782614 — Extremely high (>80%)Watershed 782615 — Low (<10%)Watershed 782706 — Low (<10%)Watershed 782707 — Low (<10%)Watershed 782616 — Low (<10%)Watershed 782617 — Low (<10%)Watershed 782708 — Extremely high (>80%)Watershed 782709 — Low (<10%)Watershed 782801 — Low (<10%)Watershed 782910 — High (40-80%)Watershed 782618 — Low (<10%)Watershed 782619 — Low (<10%)Watershed 782620 — Low (<10%)Watershed 782630 — Low (<10%)Watershed 782803 — Low (<10%)Watershed 782802 — Low (<10%)Watershed 782650 — Low (<10%)Watershed 782640 — Medium-high (20-40%)Watershed 782930 — Low-medium (10-20%)Watershed 782920 — Extremely high (>80%)Watershed 782805 — Extremely high (>80%)Watershed 782804 — Arid and low water useWatershed 782940 — Extremely high (>80%)Watershed 782950 — No dataWatershed 782970 — Medium-high (20-40%)Watershed 782960 — Medium-high (20-40%)Watershed 782661 — Low (<10%)Watershed 782807 — High (40-80%)Watershed 782806 — Extremely high (>80%)Watershed 782809 — Arid and low water useWatershed 782808 — Extremely high (>80%)Watershed 782980 — Low-medium (10-20%)Watershed 782991 — Medium-high (20-40%)Watershed 782685 — Low (<10%)Watershed 782663 — Low (<10%)Watershed 782662 — Low (<10%)Watershed 782993 — High (40-80%)Watershed 782992 — Medium-high (20-40%)Watershed 782995 — Extremely high (>80%)Watershed 782994 — Medium-high (20-40%)Watershed 782665 — Low (<10%)Watershed 782664 — Low-medium (10-20%)Watershed 782686 — Low (<10%)Watershed 782996 — Medium-high (20-40%)Watershed 782997 — High (40-80%)Watershed 782667 — Low-medium (10-20%)Watershed 782666 — High (40-80%)Watershed 782668 — Low-medium (10-20%)Watershed 782669 — Extremely high (>80%)Watershed 782999 — Low-medium (10-20%)Watershed 782998 — High (40-80%)Watershed 783101 — Low (<10%)Watershed 783102 — Low (<10%)Watershed 783103 — Low (<10%)Watershed 783104 — Low (<10%)Watershed 783105 — Medium-high (20-40%)Watershed 783106 — Low (<10%)Watershed 783107 — Low (<10%)Watershed 783108 — Low (<10%)Watershed 783109 — Low (<10%)Watershed 783210 — Low (<10%)Watershed 712261 — Low-medium (10-20%)Watershed 712243 — Low (<10%)Watershed 712262 — Low-medium (10-20%)Watershed 712263 — Low (<10%)Watershed 712265 — Medium-high (20-40%)Watershed 712264 — Extremely high (>80%)Watershed 712266 — Low-medium (10-20%)Watershed 712267 — Medium-high (20-40%)Watershed 712293 — High (40-80%)Watershed 712268 — Medium-high (20-40%)Watershed 712269 — Low-medium (10-20%)Watershed 712245 — Low (<10%)Watershed 712244 — Low (<10%)Watershed 712247 — Low (<10%)Watershed 712246 — Low (<10%)Watershed 712249 — Low (<10%)Watershed 712248 — Low (<10%)Watershed 712295 — Low (<10%)Watershed 712294 — Low-medium (10-20%)Watershed 712296 — High (40-80%)Watershed 712297 — Medium-high (20-40%)Watershed 712299 — Extremely high (>80%)Watershed 712800 — High (40-80%)Watershed 725100 — Low (<10%)Watershed 725304 — Low-medium (10-20%)Watershed 725306 — Low (<10%)Watershed 725309 — Low (<10%)Watershed 725510 — Low (<10%)Watershed 725520 — Low (<10%)Watershed 725530 — Low (<10%)Watershed 725540 — Low (<10%)Watershed 725551 — Low (<10%)Watershed 725553 — High (40-80%)Watershed 725552 — Low (<10%)Watershed 725555 — Low (<10%)Watershed 725557 — Medium-high (20-40%)Watershed 725559 — Low (<10%)Watershed 725558 — Low (<10%)Watershed 725571 — Low (<10%)Watershed 725560 — Low (<10%)Watershed 725572 — High (40-80%)Watershed 725573 — Low (<10%)Watershed 725575 — Low (<10%)Watershed 725577 — Medium-high (20-40%)Watershed 725579 — Low (<10%)Watershed 725590 — Low (<10%)Watershed 725581 — Low (<10%)Watershed 725701 — Medium-high (20-40%)Watershed 725703 — Low (<10%)Watershed 725582 — Low (<10%)Watershed 725583 — Medium-high (20-40%)Watershed 725704 — Low (<10%)Watershed 725705 — Low (<10%)Watershed 725707 — Low (<10%)Watershed 725709 — Low (<10%)Watershed 725708 — Low (<10%)Watershed 725585 — No dataWatershed 725584 — Low-medium (10-20%)Watershed 725587 — Medium-high (20-40%)Watershed 725586 — Extremely high (>80%)Watershed 725810 — Low (<10%)Watershed 725911 — Low (<10%)Watershed 725589 — Extremely high (>80%)Watershed 725588 — High (40-80%)Watershed 725913 — Low (<10%)Watershed 725915 — Low (<10%)Watershed 725821 — Low (<10%)Watershed 725831 — Low-medium (10-20%)Watershed 725823 — Low (<10%)Watershed 725822 — Low (<10%)Watershed 725916 — Low (<10%)Watershed 725918 — Low (<10%)Watershed 725940 — Low (<10%)Watershed 725832 — Low (<10%)Watershed 725833 — High (40-80%)Watershed 725824 — Low (<10%)Watershed 725825 — Low (<10%)Watershed 725827 — Low (<10%)Watershed 725826 — Medium-high (20-40%)Watershed 725834 — Low (<10%)Watershed 725836 — Low (<10%)Watershed 725837 — Medium-high (20-40%)Watershed 725839 — High (40-80%)Watershed 725838 — Low (<10%)Watershed 725991 — Low (<10%)Watershed 725980 — Low (<10%)Watershed 725840 — Low (<10%)Watershed 725870 — Medium-high (20-40%)Watershed 725860 — Low (<10%)Watershed 725829 — Extremely high (>80%)Watershed 725828 — Extremely high (>80%)Watershed 725880 — High (40-80%)Watershed 725890 — Low (<10%)Watershed 725993 — Low (<10%)Watershed 725992 — Low (<10%)Watershed 725995 — Low (<10%)Watershed 725994 — Low (<10%)Watershed 725997 — High (40-80%)Watershed 725996 — Low (<10%)Watershed 725998 — Low (<10%)Watershed 725999 — Extremely high (>80%)Watershed 726083 — Low (<10%)Watershed 726086 — Low (<10%)Watershed 726087 — Low (<10%)Watershed 726089 — Low (<10%)Watershed 726088 — Low (<10%)Watershed 731110 — Low (<10%)Watershed 731120 — Low (<10%)Watershed 731130 — Low (<10%)Watershed 731140 — Low (<10%)Watershed 731150 — Low-medium (10-20%)Watershed 731160 — Low (<10%)Watershed 731170 — Low (<10%)Watershed 731180 — Medium-high (20-40%)Watershed 731190 — Medium-high (20-40%)Watershed 731200 — Low-medium (10-20%)Watershed 731300 — Low (<10%)Watershed 731401 — Low (<10%)Watershed 731402 — Medium-high (20-40%)Watershed 731403 — Low (<10%)Watershed 731405 — Low (<10%)Watershed 731404 — Low (<10%)Watershed 731407 — Low (<10%)Watershed 731406 — Low (<10%)Watershed 731409 — Low (<10%)Watershed 731408 — Low (<10%)Watershed 731501 — Extremely high (>80%)Watershed 731502 — Low (<10%)Watershed 731503 — Extremely high (>80%)Watershed 731504 — Extremely high (>80%)Watershed 731505 — Medium-high (20-40%)Watershed 731506 — High (40-80%)Watershed 731507 — High (40-80%)Watershed 731508 — Extremely high (>80%)Watershed 731509 — Medium-high (20-40%)Watershed 731601 — Low-medium (10-20%)Watershed 731603 — Low (<10%)Watershed 731602 — High (40-80%)Watershed 731604 — Low-medium (10-20%)Watershed 731605 — Low (<10%)Watershed 731607 — Low (<10%)Watershed 731606 — Medium-high (20-40%)Watershed 731609 — Low-medium (10-20%)Watershed 731608 — Medium-high (20-40%)Watershed 731700 — Low-medium (10-20%)Watershed 731801 — Low (<10%)Watershed 731802 — Extremely high (>80%)Watershed 731803 — Low (<10%)Watershed 731805 — High (40-80%)Watershed 731804 — High (40-80%)Watershed 731807 — Low (<10%)Watershed 731806 — Medium-high (20-40%)Watershed 731808 — High (40-80%)Watershed 731809 — Low (<10%)Watershed 731901 — High (40-80%)Watershed 731902 — High (40-80%)Watershed 731903 — High (40-80%)Watershed 731904 — Medium-high (20-40%)Watershed 731905 — Extremely high (>80%)Watershed 731906 — Medium-high (20-40%)Watershed 731908 — High (40-80%)Watershed 731909 — Low-medium (10-20%)Watershed 732110 — High (40-80%)Watershed 732120 — Extremely high (>80%)Watershed 732130 — Low (<10%)Watershed 732140 — High (40-80%)Watershed 732150 — High (40-80%)Watershed 732160 — Extremely high (>80%)Watershed 732170 — Medium-high (20-40%)Watershed 732180 — High (40-80%)Watershed 732190 — Low (<10%)Watershed 732201 — Low (<10%)Watershed 732202 — High (40-80%)Watershed 732203 — Low (<10%)Watershed 732205 — Low (<10%)Watershed 732204 — Medium-high (20-40%)Watershed 732207 — Low-medium (10-20%)Watershed 732206 — Low (<10%)Watershed 732208 — Extremely high (>80%)Watershed 732209 — High (40-80%)Watershed 732300 — Low (<10%)Watershed 732401 — Low (<10%)Watershed 732403 — Medium-high (20-40%)Watershed 732402 — High (40-80%)Watershed 732404 — Extremely high (>80%)Watershed 732405 — Medium-high (20-40%)Watershed 732407 — Low-medium (10-20%)Watershed 732406 — High (40-80%)Watershed 732409 — Medium-high (20-40%)Watershed 732408 — High (40-80%)Watershed 732510 — Medium-high (20-40%)Watershed 732520 — Medium-high (20-40%)Watershed 732530 — Low (<10%)Watershed 732541 — Low (<10%)Watershed 732542 — Low-medium (10-20%)Watershed 732543 — Low (<10%)Watershed 732545 — Low (<10%)Watershed 732544 — Low-medium (10-20%)Watershed 732546 — Medium-high (20-40%)Watershed 732547 — Medium-high (20-40%)Watershed 732548 — High (40-80%)Watershed 732549 — High (40-80%)Watershed 732550 — Low-medium (10-20%)Watershed 732560 — High (40-80%)Watershed 732571 — Extremely high (>80%)Watershed 732572 — Low-medium (10-20%)Watershed 732573 — Medium-high (20-40%)Watershed 732574 — Medium-high (20-40%)Watershed 732575 — Medium-high (20-40%)Watershed 732576 — Medium-high (20-40%)Watershed 732577 — High (40-80%)Watershed 732578 — High (40-80%)Watershed 732579 — Low (<10%)Watershed 732580 — High (40-80%)Watershed 732590 — Medium-high (20-40%)Watershed 732601 — Low (<10%)Watershed 732603 — Low (<10%)Watershed 732602 — Medium-high (20-40%)Watershed 732604 — Low-medium (10-20%)Watershed 732605 — Low (<10%)Watershed 732606 — Low-medium (10-20%)Watershed 732607 — Low (<10%)Watershed 732608 — Low (<10%)Watershed 732609 — Medium-high (20-40%)Watershed 732701 — Low (<10%)Watershed 732702 — Low-medium (10-20%)Watershed 732703 — Medium-high (20-40%)Watershed 732704 — Medium-high (20-40%)Watershed 732705 — Low (<10%)Watershed 732706 — Low-medium (10-20%)Watershed 732707 — Medium-high (20-40%)Watershed 732708 — Low (<10%)Watershed 732709 — Low (<10%)Watershed 732810 — Low (<10%)Watershed 732821 — Low (<10%)Watershed 732830 — Low (<10%)Watershed 732822 — Extremely high (>80%)Watershed 732823 — Low (<10%)Watershed 732824 — Low-medium (10-20%)Watershed 732825 — Low (<10%)Watershed 732850 — Low-medium (10-20%)Watershed 732840 — Medium-high (20-40%)Watershed 732826 — Medium-high (20-40%)Watershed 732827 — Low (<10%)Watershed 732860 — Medium-high (20-40%)Watershed 732870 — Low-medium (10-20%)Watershed 732829 — Medium-high (20-40%)Watershed 732828 — Low-medium (10-20%)Watershed 732880 — Medium-high (20-40%)Watershed 732890 — High (40-80%)Watershed 732900 — High (40-80%)Watershed 741001 — Medium-high (20-40%)Watershed 741002 — Medium-high (20-40%)Watershed 741003 — Medium-high (20-40%)Watershed 741004 — Low (<10%)Watershed 741005 — No dataWatershed 741006 — Medium-high (20-40%)Watershed 741007 — No dataWatershed 741008 — Medium-high (20-40%)Watershed 741009 — Low (<10%)Watershed 742100 — Low (<10%)Watershed 742301 — Low (<10%)Watershed 742210 — Low (<10%)Watershed 742231 — Low (<10%)Watershed 742221 — Low (<10%)Watershed 742303 — Low (<10%)Watershed 742302 — Low (<10%)Watershed 742223 — Low (<10%)Watershed 742222 — Low (<10%)Watershed 742225 — Low (<10%)Watershed 742224 — Low (<10%)Watershed 742305 — Low (<10%)Watershed 742304 — Low (<10%)Watershed 742227 — Low-medium (10-20%)Watershed 742226 — Medium-high (20-40%)Watershed 742307 — Low (<10%)Watershed 742306 — Low (<10%)Watershed 742309 — Low (<10%)Watershed 742308 — Low (<10%)Watershed 742233 — Low (<10%)Watershed 742232 — Medium-high (20-40%)Watershed 742234 — Extremely high (>80%)Watershed 742235 — Low (<10%)Watershed 742236 — Low-medium (10-20%)Watershed 742237 — Low (<10%)Watershed 742229 — Medium-high (20-40%)Watershed 742228 — Low-medium (10-20%)Watershed 742239 — Low (<10%)Watershed 742238 — Medium-high (20-40%)Watershed 742510 — Low (<10%)Watershed 742411 — Low (<10%)Watershed 742521 — Low (<10%)Watershed 742530 — Low (<10%)Watershed 742413 — Low (<10%)Watershed 742412 — Extremely high (>80%)Watershed 742250 — Low (<10%)Watershed 742240 — Low (<10%)Watershed 742540 — Extremely high (>80%)Watershed 742550 — Low (<10%)Watershed 742523 — Medium-high (20-40%)Watershed 742522 — Extremely high (>80%)Watershed 742415 — Low (<10%)Watershed 742414 — Low (<10%)Watershed 742524 — Low-medium (10-20%)Watershed 742525 — Medium-high (20-40%)Watershed 742570 — Low (<10%)Watershed 742560 — Medium-high (20-40%)Watershed 742417 — Low (<10%)Watershed 742416 — Low (<10%)Watershed 742527 — Low-medium (10-20%)Watershed 742526 — Extremely high (>80%)Watershed 742580 — High (40-80%)Watershed 742590 — Low (<10%)Watershed 742418 — Low-medium (10-20%)Watershed 742419 — Low (<10%)Watershed 742529 — High (40-80%)Watershed 742528 — Medium-high (20-40%)Watershed 742271 — Low-medium (10-20%)Watershed 742260 — High (40-80%)Watershed 742430 — Low (<10%)Watershed 742421 — Low (<10%)Watershed 742701 — Low (<10%)Watershed 742610 — Low (<10%)Watershed 742422 — Medium-high (20-40%)Watershed 742423 — Low-medium (10-20%)Watershed 742441 — Low (<10%)Watershed 742450 — No dataWatershed 742470 — Medium-high (20-40%)Watershed 742460 — Low-medium (10-20%)Watershed 742703 — Low (<10%)Watershed 742702 — Medium-high (20-40%)Watershed 742630 — Low (<10%)Watershed 742621 — Low (<10%)Watershed 742641 — Low (<10%)Watershed 742650 — Low (<10%)Watershed 742704 — Medium-high (20-40%)Watershed 742705 — Low (<10%)Watershed 742443 — Low (<10%)Watershed 742442 — Low (<10%)Watershed 742481 — Low (<10%)Watershed 742491 — Low (<10%)Watershed 742273 — Low-medium (10-20%)Watershed 742272 — Low (<10%)Watershed 742707 — Low (<10%)Watershed 742706 — Medium-high (20-40%)Watershed 742444 — Extremely high (>80%)Watershed 742445 — Low (<10%)Watershed 742671 — Low (<10%)Watershed 742661 — Low-medium (10-20%)Watershed 742446 — Medium-high (20-40%)Watershed 742447 — Low (<10%)Watershed 742275 — Low (<10%)Watershed 742274 — High (40-80%)Watershed 742277 — Low (<10%)Watershed 742276 — High (40-80%)Watershed 742663 — Low (<10%)Watershed 742662 — Low-medium (10-20%)Watershed 742623 — Low (<10%)Watershed 742622 — Extremely high (>80%)Watershed 742708 — Low (<10%)Watershed 742709 — Low (<10%)Watershed 742642 — Extremely high (>80%)Watershed 742643 — Low-medium (10-20%)Watershed 742672 — Medium-high (20-40%)Watershed 742673 — Low (<10%)Watershed 742911 — Low (<10%)Watershed 742810 — High (40-80%)Watershed 742493 — High (40-80%)Watershed 742492 — High (40-80%)Watershed 742278 — Extremely high (>80%)Watershed 742279 — Low (<10%)Watershed 742665 — Low (<10%)Watershed 742664 — Medium-high (20-40%)Watershed 742482 — High (40-80%)Watershed 742483 — High (40-80%)Watershed 742821 — Low (<10%)Watershed 742830 — Low (<10%)Watershed 742290 — Extremely high (>80%)Watershed 742280 — Extremely high (>80%)Watershed 742666 — Medium-high (20-40%)Watershed 742667 — Low-medium (10-20%)Watershed 742645 — Low (<10%)Watershed 742644 — High (40-80%)Watershed 742449 — Low-medium (10-20%)Watershed 742448 — Low (<10%)Watershed 742913 — Low (<10%)Watershed 742912 — Extremely high (>80%)Watershed 742822 — Low-medium (10-20%)Watershed 742823 — Low (<10%)Watershed 742915 — Low (<10%)Watershed 742914 — Low-medium (10-20%)Watershed 742824 — Medium-high (20-40%)Watershed 742825 — Low-medium (10-20%)Watershed 742647 — Medium-high (20-40%)Watershed 742646 — Medium-high (20-40%)Watershed 742850 — Low (<10%)Watershed 742841 — Low (<10%)Watershed 742485 — Extremely high (>80%)Watershed 742484 — Extremely high (>80%)Watershed 742917 — Low (<10%)Watershed 742916 — Low (<10%)Watershed 742675 — Low (<10%)Watershed 742674 — Medium-high (20-40%)Watershed 742669 — Medium-high (20-40%)Watershed 742668 — Low (<10%)Watershed 742871 — Low (<10%)Watershed 742861 — Low (<10%)Watershed 742486 — Extremely high (>80%)Watershed 742487 — Extremely high (>80%)Watershed 742919 — Low (<10%)Watershed 742918 — Low-medium (10-20%)Watershed 742494 — Extremely high (>80%)Watershed 742495 — Extremely high (>80%)Watershed 742827 — High (40-80%)Watershed 742826 — Extremely high (>80%)Watershed 742862 — High (40-80%)Watershed 742863 — Low-medium (10-20%)Watershed 742873 — Low-medium (10-20%)Watershed 742872 — High (40-80%)Watershed 742677 — Low (<10%)Watershed 742676 — Medium-high (20-40%)Watershed 742488 — Extremely high (>80%)Watershed 742489 — Extremely high (>80%)Watershed 742843 — Low (<10%)Watershed 742842 — Low (<10%)Watershed 742828 — High (40-80%)Watershed 742829 — Extremely high (>80%)Watershed 742624 — Low (<10%)Watershed 742625 — Low (<10%)Watershed 742648 — Low (<10%)Watershed 742649 — Medium-high (20-40%)Watershed 742845 — Low-medium (10-20%)Watershed 742844 — Low-medium (10-20%)Watershed 742921 — Low-medium (10-20%)Watershed 742931 — Low (<10%)Watershed 742425 — Extremely high (>80%)Watershed 742424 — Extremely high (>80%)Watershed 742932 — Low (<10%)Watershed 742933 — Low (<10%)Watershed 742627 — Low (<10%)Watershed 742626 — Medium-high (20-40%)Watershed 742846 — Medium-high (20-40%)Watershed 742847 — Low-medium (10-20%)Watershed 742679 — Medium-high (20-40%)Watershed 742678 — Medium-high (20-40%)Watershed 742864 — Medium-high (20-40%)Watershed 742865 — No dataWatershed 742875 — Low-medium (10-20%)Watershed 742874 — High (40-80%)Watershed 742866 — High (40-80%)Watershed 742867 — Low (<10%)Watershed 742935 — Low (<10%)Watershed 742934 — Medium-high (20-40%)Watershed 742848 — Medium-high (20-40%)Watershed 742849 — Medium-high (20-40%)Watershed 742427 — Arid and low water useWatershed 742426 — Arid and low water useWatershed 742628 — Low-medium (10-20%)Watershed 742629 — Low-medium (10-20%)Watershed 742496 — Extremely high (>80%)Watershed 742497 — High (40-80%)Watershed 742869 — Medium-high (20-40%)Watershed 742868 — High (40-80%)Watershed 742937 — Low (<10%)Watershed 742936 — High (40-80%)Watershed 742922 — Extremely high (>80%)Watershed 742923 — Low (<10%)Watershed 742681 — Low (<10%)Watershed 742691 — Low (<10%)Watershed 742499 — Extremely high (>80%)Watershed 742498 — Low-medium (10-20%)Watershed 742925 — Extremely high (>80%)Watershed 742924 — Extremely high (>80%)Watershed 742939 — Low (<10%)Watershed 742938 — High (40-80%)Watershed 742429 — Arid and low water useWatershed 742428 — Arid and low water useWatershed 742682 — Medium-high (20-40%)Watershed 742683 — Low (<10%)Watershed 742877 — Low (<10%)Watershed 742876 — High (40-80%)Watershed 742684 — Low (<10%)Watershed 742685 — Low (<10%)Watershed 742941 — Low-medium (10-20%)Watershed 742951 — Low (<10%)Watershed 742692 — Low-medium (10-20%)Watershed 742693 — Low (<10%)Watershed 742695 — Low (<10%)Watershed 742694 — Medium-high (20-40%)Watershed 742687 — Low (<10%)Watershed 742686 — Low-medium (10-20%)Watershed 742879 — Low (<10%)Watershed 742878 — Extremely high (>80%)Watershed 742943 — Low-medium (10-20%)Watershed 742942 — Extremely high (>80%)Watershed 742891 — Extremely high (>80%)Watershed 742881 — Low-medium (10-20%)Watershed 742688 — Low (<10%)Watershed 742689 — Medium-high (20-40%)Watershed 742893 — Low-medium (10-20%)Watershed 742892 — High (40-80%)Watershed 742895 — Extremely high (>80%)Watershed 742894 — High (40-80%)Watershed 742945 — Extremely high (>80%)Watershed 742944 — Extremely high (>80%)Watershed 742953 — Low (<10%)Watershed 742952 — High (40-80%)Watershed 742883 — Low (<10%)Watershed 742882 — High (40-80%)Watershed 742697 — Low (<10%)Watershed 742696 — Low (<10%)Watershed 742885 — Low-medium (10-20%)Watershed 742884 — Low (<10%)Watershed 742927 — Extremely high (>80%)Watershed 742926 — Extremely high (>80%)Watershed 742699 — Low-medium (10-20%)Watershed 742698 — Medium-high (20-40%)Watershed 742955 — Low (<10%)Watershed 742954 — Low (<10%)Watershed 742896 — Extremely high (>80%)Watershed 742897 — Extremely high (>80%)Watershed 742957 — Low (<10%)Watershed 742956 — Extremely high (>80%)Watershed 742929 — Extremely high (>80%)Watershed 742928 — Extremely high (>80%)Watershed 742887 — Low (<10%)Watershed 742886 — Low-medium (10-20%)Watershed 742888 — Low-medium (10-20%)Watershed 742889 — Low-medium (10-20%)Watershed 742946 — Extremely high (>80%)Watershed 742947 — Extremely high (>80%)Watershed 742959 — Low (<10%)Watershed 742958 — Low (<10%)Watershed 742899 — Extremely high (>80%)Watershed 742898 — Extremely high (>80%)Watershed 742961 — Low (<10%)Watershed 742971 — Low (<10%)Watershed 742949 — High (40-80%)Watershed 742948 — High (40-80%)Watershed 742963 — Low (<10%)Watershed 742962 — High (40-80%)Watershed 742973 — Low (<10%)Watershed 742972 — Medium-high (20-40%)Watershed 742974 — Low (<10%)Watershed 742975 — Low (<10%)Watershed 742964 — High (40-80%)Watershed 742965 — High (40-80%)Watershed 742976 — Low (<10%)Watershed 742977 — Low (<10%)Watershed 742967 — Arid and low water useWatershed 742966 — Arid and low water useWatershed 742969 — Arid and low water useWatershed 742968 — Arid and low water useWatershed 742978 — Low-medium (10-20%)Watershed 742979 — Low (<10%)Watershed 742991 — Low-medium (10-20%)Watershed 742981 — Low-medium (10-20%)Watershed 742992 — Extremely high (>80%)Watershed 742993 — Medium-high (20-40%)Watershed 742983 — Low (<10%)Watershed 742982 — Arid and low water useWatershed 742995 — Low (<10%)Watershed 742994 — Arid and low water useWatershed 742984 — High (40-80%)Watershed 742985 — Low (<10%)Watershed 742996 — High (40-80%)Watershed 742997 — Low (<10%)Watershed 742986 — Medium-high (20-40%)Watershed 742987 — Low (<10%)Watershed 742989 — Extremely high (>80%)Watershed 742988 — Extremely high (>80%)Watershed 742999 — Medium-high (20-40%)Watershed 742998 — Extremely high (>80%)Watershed 743001 — Low (<10%)Watershed 743002 — Low (<10%)Watershed 743003 — Low (<10%)Watershed 743004 — Low (<10%)Watershed 743005 — Low (<10%)Watershed 743006 — High (40-80%)Watershed 743007 — Medium-high (20-40%)Watershed 743008 — Medium-high (20-40%)Watershed 743009 — Low (<10%)Watershed 751100 — No dataWatershed 751201 — Low (<10%)Watershed 751202 — Low-medium (10-20%)Watershed 751203 — Low (<10%)Watershed 751205 — Low-medium (10-20%)Watershed 751204 — Low-medium (10-20%)Watershed 751207 — Medium-high (20-40%)Watershed 751206 — Low (<10%)Watershed 751209 — Medium-high (20-40%)Watershed 751208 — Low-medium (10-20%)Watershed 751300 — High (40-80%)Watershed 751401 — Low (<10%)Watershed 751402 — Low-medium (10-20%)Watershed 751403 — Low (<10%)Watershed 751404 — High (40-80%)Watershed 751405 — Low (<10%)Watershed 751406 — High (40-80%)Watershed 751407 — Medium-high (20-40%)Watershed 751409 — Extremely high (>80%)Watershed 751408 — High (40-80%)Watershed 751500 — Medium-high (20-40%)Watershed 751610 — Low (<10%)Watershed 751630 — Low (<10%)Watershed 751620 — Low (<10%)Watershed 751640 — Medium-high (20-40%)Watershed 751650 — Low-medium (10-20%)Watershed 751660 — Extremely high (>80%)Watershed 751670 — High (40-80%)Watershed 751690 — Extremely high (>80%)Watershed 751680 — Extremely high (>80%)Watershed 751700 — Low-medium (10-20%)Watershed 751810 — High (40-80%)Watershed 751820 — High (40-80%)Watershed 751830 — Medium-high (20-40%)Watershed 751840 — Arid and low water useWatershed 751850 — Medium-high (20-40%)Watershed 751860 — High (40-80%)Watershed 751870 — Medium-high (20-40%)Watershed 751890 — Extremely high (>80%)Watershed 751880 — Extremely high (>80%)Watershed 751910 — Medium-high (20-40%)Watershed 751920 — Low-medium (10-20%)Watershed 751930 — Medium-high (20-40%)Watershed 751940 — High (40-80%)Watershed 751950 — Low (<10%)Watershed 751961 — Low (<10%)Watershed 751963 — Low (<10%)Watershed 751962 — Extremely high (>80%)Watershed 751965 — Low-medium (10-20%)Watershed 751964 — Arid and low water useWatershed 751967 — Medium-high (20-40%)Watershed 751966 — Arid and low water useWatershed 751968 — Low (<10%)Watershed 751969 — Low (<10%)Watershed 751970 — High (40-80%)Watershed 751980 — Arid and low water useWatershed 751990 — Extremely high (>80%)Watershed 752110 — Extremely high (>80%)Watershed 752130 — Medium-high (20-40%)Watershed 752151 — Extremely high (>80%)Watershed 752153 — Low-medium (10-20%)Watershed 752154 — Extremely high (>80%)Watershed 752155 — Extremely high (>80%)Watershed 752157 — Low (<10%)Watershed 752156 — Low (<10%)Watershed 752159 — Low (<10%)Watershed 752158 — Arid and low water useWatershed 752161 — Arid and low water useWatershed 752171 — Low-medium (10-20%)Watershed 752173 — High (40-80%)Watershed 752172 — Arid and low water useWatershed 752174 — Arid and low water useWatershed 752175 — Medium-high (20-40%)Watershed 752176 — Arid and low water useWatershed 752177 — Extremely high (>80%)Watershed 752162 — Arid and low water useWatershed 752163 — Arid and low water useWatershed 752165 — Extremely high (>80%)Watershed 752164 — Arid and low water useWatershed 752179 — Medium-high (20-40%)Watershed 752178 — Arid and low water useWatershed 752191 — Extremely high (>80%)Watershed 752166 — Extremely high (>80%)Watershed 752167 — Medium-high (20-40%)Watershed 752168 — Arid and low water useWatershed 752169 — Arid and low water useWatershed 752193 — Low (<10%)Watershed 752192 — Low (<10%)Watershed 752194 — Arid and low water useWatershed 752195 — High (40-80%)Watershed 752197 — Low-medium (10-20%)Watershed 752196 — Low-medium (10-20%)Watershed 752198 — Extremely high (>80%)Watershed 752199 — Medium-high (20-40%)Watershed 753101 — Extremely high (>80%)Watershed 774100 — Extremely high (>80%)Watershed 783309 — Low (<10%)Watershed 731000 — Extremely high (>80%)Watershed 732570 — Low (<10%)Watershed 773811 — Arid and low water useWatershed 773813 — Low (<10%)Watershed 773812 — Low (<10%)Watershed 773814 — Medium-high (20-40%)Watershed 773815 — Low (<10%)Watershed 773817 — Low (<10%)Watershed 773816 — Medium-high (20-40%)Watershed 773818 — Low-medium (10-20%)Watershed 773819 — High (40-80%)Watershed 773401 — Extremely high (>80%)Watershed 773831 — Low (<10%)Watershed 773832 — Medium-high (20-40%)Watershed 773833 — No dataWatershed 773835 — Low (<10%)Watershed 773834 — Extremely high (>80%)Watershed 773836 — Medium-high (20-40%)Watershed 773837 — Extremely high (>80%)Watershed 773838 — Arid and low water useWatershed 773839 — Extremely high (>80%)Watershed 752312 — Extremely high (>80%)Watershed 774401 — Extremely high (>80%)Watershed 773201 — Arid and low water useWatershed 772000 — Extremely high (>80%)Watershed 773506 — Extremely high (>80%)Watershed 752360 — Extremely high (>80%)Watershed 782900 — Extremely high (>80%)Watershed 773605 — Extremely high (>80%)Watershed 773202 — Extremely high (>80%)Watershed 752102 — Arid and low water useWatershed 712260 — Medium-high (20-40%)Watershed 773309 — Extremely high (>80%)Watershed 773209 — Medium-high (20-40%)Watershed 752105 — Arid and low water useWatershed 773702 — Arid and low water useWatershed 773404 — Arid and low water useWatershed 752101 — Arid and low water useWatershed 773501 — High (40-80%)Watershed 773304 — Arid and low water useWatershed 774800 — Extremely high (>80%)Watershed 774402 — Extremely high (>80%)Watershed 752109 — Extremely high (>80%)Watershed 773508 — High (40-80%)Watershed 772200 — Arid and low water useWatershed 773301 — Arid and low water useWatershed 773402 — Arid and low water useWatershed 773305 — Arid and low water useWatershed 773100 — Arid and low water useWatershed 773840 — Extremely high (>80%)Watershed 773503 — Extremely high (>80%)Watershed 773604 — Arid and low water useWatershed 752107 — Arid and low water useWatershed 773603 — Arid and low water useWatershed 771800 — Extremely high (>80%)Watershed 752370 — Extremely high (>80%)Watershed 773505 — Medium-high (20-40%)Watershed 742490 — Extremely high (>80%)Watershed 772300 — Extremely high (>80%)Watershed 773405 — Arid and low water useWatershed 773303 — Arid and low water useWatershed 773205 — Extremely high (>80%)Watershed 773403 — Medium-high (20-40%)Watershed 773307 — Medium-high (20-40%)Watershed 752190 — Arid and low water useWatershed 752106 — Arid and low water useWatershed 773207 — Arid and low water useWatershed 773701 — Medium-high (20-40%)Watershed 773203 — Arid and low water useWatershed 742940 — Low (<10%)Watershed 773502 — Low-medium (10-20%)Watershed 773302 — Arid and low water useWatershed 773204 — Extremely high (>80%)Watershed 773703 — Arid and low water useWatershed 773609 — Extremely high (>80%)Watershed 773810 — Low (<10%)Watershed 773607 — Arid and low water useWatershed 773208 — Low (<10%)Watershed 773504 — Extremely high (>80%)Watershed 773820 — Arid and low water useWatershed 773206 — Arid and low water useWatershed 773308 — Low (<10%)Watershed 752108 — Arid and low water useWatershed 752320 — Extremely high (>80%)Watershed 742970 — Low-medium (10-20%)Watershed 751600 — Extremely high (>80%)Watershed 773601 — Extremely high (>80%)Watershed 773830 — Arid and low water useWatershed 752103 — Arid and low water useWatershed 773507 — Low-medium (10-20%)Watershed 773602 — Extremely high (>80%)Watershed 752104 — Extremely high (>80%)Watershed 774403 — Extremely high (>80%)Watershed 773608 — Low-medium (10-20%)Watershed 773200 — Extremely high (>80%)Watershed 772220 — Arid and low water useWatershed 773306 — Arid and low water useWatershed 752160 — Arid and low water useWatershed 773606 — Arid and low water useWatershed 742950 — Low (<10%)Watershed 772340 — Extremely high (>80%)Watershed 773509 — Arid and low water useWatershed 742680 — Low-medium (10-20%)
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MississippiCarroll, MississippiLowndes, MississippiLawrence, TennesseeMcIntosh, OklahomaLinn, IowaDubuque, IowaLucas, IowaBeaver, OklahomaMonroe, IowaTioga, PennsylvaniaTaylor, IowaCrawford, PennsylvaniaAdams, IowaDavidson, TennesseeClarke, IowaRay, MissouriSaline, MissouriMiller, MissouriDuchesne, UtahTipton, TennesseeDecatur, IowaRichland, MontanaGlacier, MontanaFlathead, MontanaLincoln, MontanaBeaverhead, MontanaDeer Lodge, MontanaGranite, MontanaLake, MontanaMineral, MontanaMissoula, MontanaPowell, MontanaRavalli, MontanaRinggold, IowaJefferson, MontanaJudith Basin, MontanaLewis and Clark, MontanaMeagher, MontanaWheatland, MontanaPark, MontanaSweet Grass, MontanaCarbon, MontanaFergus, MontanaGarfield, MontanaMusselshell, MontanaPetroleum, MontanaStillwater, MontanaAppanoose, IowaCherokee, TexasWayne, IowaHunt, TexasVan Buren, IowaPage, VirginiaDavis, IowaAlbany, WyomingKing, WashingtonWapello, IowaCrawford, WisconsinHenry, IowaMarinette, WisconsinJefferson, IowaPalo Alto, IowaPocahontas, IowaBuena Vista, IowaClay, IowaJasper, IowaMarion, IowaCarroll, IowaHumboldt, IowaMcPherson, NebraskaKossuth, IowaGreene, IowaWinnebago, IowaWright, IowaHooker, NebraskaCerro Gordo, IowaAdair, IowaHillsborough, New HampshireSullivan, New HampshireMerrimack, New HampshireCarroll, New HampshireCoos, New HampshireBelknap, New HampshireStrafford, New HampshireAtlantic, New JerseyWarren, New JerseyHudson, New JerseyWorth, IowaMorris, New JerseyPassaic, New JerseyCamden, New JerseySussex, New JerseyGloucester, New JerseySalem, New JerseyMonmouth, New JerseyEssex, New JerseyUnion, New JerseyMiddlesex, New JerseyBergen, New JerseyBurlington, New JerseyCumberland, New JerseyOcean, New JerseyGuthrie, IowaChaves, New MexicoDona Ana, New MexicoDe Baca, New MexicoSan Miguel, New MexicoRoosevelt, New MexicoUnion, New MexicoEddy, New MexicoOtero, New MexicoMcKinley, New MexicoFranklin, IowaUlster, New YorkMonroe, New YorkWestchester, New YorkOrleans, New YorkBronx, New YorkKings, New YorkChautauqua, New YorkSteuben, New YorkMontgomery, New YorkCayuga, New YorkOnondaga, New YorkOswego, New YorkSchuyler, New YorkCrawford, IowaMadison, New YorkOneida, New YorkClinton, New YorkOtsego, New YorkEssex, New YorkFranklin, New YorkAlbany, New YorkFulton, New YorkGreene, New YorkDallas, IowaCattaraugus, New YorkSchenectady, New YorkAllegany, New YorkBoone, IowaWarren, New YorkWashington, New YorkColumbia, New YorkRensselaer, New YorkRichmond, New YorkDelaware, New YorkHamilton, New YorkOrange, New YorkPutnam, New YorkNassau, New YorkNiagara, New YorkErie, New YorkQueens, New YorkMadison, IowaTompkins, New YorkSuffolk, New YorkSullivan, New YorkWayne, New YorkYancey, North CarolinaHaywood, North CarolinaJackson, North CarolinaRichmond, North CarolinaPamlico, North CarolinaGranville, North CarolinaCalhoun, IowaRandolph, North CarolinaWatauga, North CarolinaMitchell, North CarolinaCatawba, North CarolinaCabarrus, North CarolinaDavie, North CarolinaRowan, North CarolinaStanly, North CarolinaRobeson, North CarolinaEdgecombe, North CarolinaDare, North CarolinaBrunswick, North CarolinaColumbus, North CarolinaGreene, North CarolinaIda, IowaSac, IowaHamilton, IowaHardin, IowaWebster, IowaGrundy, IowaBenton, IowaAtoka, OklahomaBryan, OklahomaWagoner, OklahomaSequoyah, OklahomaJackson, OklahomaKeokuk, IowaIowa, IowaMahaska, IowaPoweshiek, IowaTama, IowaCedar, IowaWashington, Rhode IslandCalhoun, South CarolinaClarendon, South CarolinaDorchester, South CarolinaJones, IowaKershaw, South CarolinaAiken, South CarolinaSumter, South CarolinaChesterfield, South CarolinaChester, South CarolinaSaluda, South CarolinaGreenville, South CarolinaBerkeley, South CarolinaLouisa, IowaWoodbury, IowaLyon, IowaO'Brien, IowaGeorgetown, South CarolinaBeaufort, South CarolinaJasper, South CarolinaAllendale, South CarolinaBamberg, South CarolinaBarnwell, South CarolinaOrangeburg, South CarolinaDillon, South CarolinaFlorence, South CarolinaFairfield, South CarolinaDarlington, South CarolinaHorry, South CarolinaMarion, South CarolinaRooks, KansasBarton, KansasLexington, South CarolinaAnderson, South CarolinaLaurens, South CarolinaEdgefield, South CarolinaUnion, South CarolinaCherokee, South CarolinaMcCormick, South CarolinaAbbeville, South CarolinaSpartanburg, South CarolinaStafford, KansasNess, KansasGraham, KansasOsborne, KansasPawnee, KansasRussell, KansasHouston, TexasBarber, KansasJasper, TexasJefferson, TexasClark, KansasKiowa, KansasPratt, KansasHarper, KansasKingman, KansasEllsworth, KansasLincoln, KansasOttawa, KansasRice, KansasSaline, KansasHarvey, KansasMcPherson, KansasChase, KansasGreenwood, KansasLyon, KansasMorris, KansasCoffey, KansasWoodson, KansasChautauqua, KansasElk, KansasMontgomery, KansasPhillips, KansasSmith, KansasCloud, KansasRepublic, KansasWashington, KansasJewell, KansasMitchell, KansasMarshall, KansasJackson, KansasBrown, KansasGove, KansasAllen, KansasNeosho, KansasAnderson, KansasWichita, KansasMeade, KansasLane, KansasMorton, KansasGreeley, KansasGray, KansasScott, KansasLipscomb, TexasRawlins, KansasStevens, KansasCheyenne, KansasSherman, KansasWallace, KansasGrant, KansasHansford, TexasKearny, KansasStanton, KansasSeward, KansasFinney, KansasHodgeman, KansasLogan, KansasSheridan, KansasThomas, KansasTrego, KansasComanche, KansasEdwards, KansasDecatur, KansasHamilton, KansasNorton, KansasFord, KansasRush, KansasWilson, KansasNemaha, KansasCherokee, KansasBourbon, KansasCrawford, KansasLabette, KansasFranklin, KansasLinn, KansasMiami, KansasFayette, KentuckyGarrard, KentuckyBoyle, KentuckyPendleton, KentuckyNicholas, KentuckyTodd, KentuckyTrigg, KentuckyLogan, KentuckyEdmonson, KentuckyRussell, KentuckySimpson, KentuckyAllen, KentuckyBarren, KentuckyTaylor, KentuckyHenry, KentuckyJefferson, KentuckyCarroll, KentuckyShelby, KentuckyMetcalfe, KentuckyAdair, KentuckyMason, KentuckyMonroe, KentuckyBallard, KentuckyCarlisle, KentuckyFulton, KentuckyHickman, KentuckyCalloway, KentuckyMarshall, KentuckyLivingston, KentuckyCrittenden, KentuckyHopkins, KentuckyLyon, KentuckyWebster, KentuckyUnion, KentuckyButler, KentuckyWest Baton Rouge, LouisianaCalhoun, MichiganMissaukee, MichiganMontcalm, MichiganGladwin, MichiganIsabella, MichiganJackson, MichiganGratiot, MichiganMontmorency, MichiganSt. Joseph, MichiganMidland, MichiganOgemaw, MichiganShiawassee, MichiganWayne, MichiganAlpena, MichiganChippewa, MichiganEaton, MichiganKalamazoo, MichiganMecosta, MichiganOsceola, MichiganWexford, MichiganIonia, MichiganKalkaska, MichiganLake, MichiganClare, MichiganCrawford, MichiganRoscommon, MichiganClinton, MichiganCass, MichiganHillsdale, MichiganBranch, MichiganOscoda, MichiganSaginaw, MichiganOtsego, MichiganRock, MinnesotaDodge, MinnesotaCook, MinnesotaIsanti, MinnesotaCarlton, MinnesotaFillmore, MinnesotaHouston, MinnesotaMower, MinnesotaBenton, MinnesotaOlmsted, MinnesotaChisago, MinnesotaPope, MinnesotaMorrison, MinnesotaStearns, MinnesotaTodd, MinnesotaCrow Wing, MinnesotaItasca, MinnesotaRice, MinnesotaBrown, MinnesotaNicollet, MinnesotaKandiyohi, MinnesotaMeeker, MinnesotaHubbard, MinnesotaWadena, MinnesotaKanabec, MinnesotaMartin, MinnesotaSteele, MinnesotaJackson, MinnesotaCottonwood, MinnesotaWaseca, MinnesotaFaribault, MinnesotaFreeborn, MinnesotaMcLeod, MinnesotaKittson, MinnesotaMarshall, MinnesotaPolk, MinnesotaNorman, MinnesotaBig Stone, MinnesotaLac qui Parle, MinnesotaBecker, MinnesotaTraverse, MinnesotaPennington, MinnesotaRed Lake, MinnesotaMahnomen, MinnesotaGrant, MinnesotaStevens, MinnesotaSwift, MinnesotaDouglas, MinnesotaNobles, MinnesotaLincoln, MinnesotaLyon, MinnesotaMurray, MinnesotaPipestone, MinnesotaLeflore, MississippiWashington, MississippiSunflower, MississippiHolmes, MississippiClay, MississippiMontgomery, MississippiWebster, MississippiLee, MississippiLafayette, MississippiQuitman, MississippiOktibbeha, MississippiWinston, MississippiCalhoun, MississippiChickasaw, MississippiPontotoc, MississippiBenton, MississippiGrenada, MississippiPanola, MississippiTippah, MississippiUnion, MississippiYalobusha, MississippiAlcorn, MississippiItawamba, MississippiPrentiss, MississippiTishomingo, MississippiIssaquena, MississippiHancock, MississippiCovington, MississippiAdams, MississippiLawrence, MississippiLincoln, MississippiPike, MississippiWalthall, MississippiGeorge, MississippiStone, MississippiClarke, MississippiForrest, MississippiGreene, MississippiJasper, MississippiJones, MississippiLauderdale, MississippiNewton, MississippiPerry, MississippiWayne, MississippiLamar, MississippiMarion, MississippiScott, MississippiSmith, MississippiLeake, MississippiKemper, MississippiNeshoba, MississippiNoxubee, MississippiPearl River, MississippiHarrison, MississippiJackson, MississippiPemiscot, MissouriAndrew, MissouriBuchanan, MissouriNodaway, MissouriHolt, MissouriAtchison, MissouriCooper, MissouriDeKalb, MissouriGentry, MissouriStaunton, VirginiaPatrick, VirginiaCaldwell, MissouriLexington, VirginiaDaviess, MissouriGrundy, MissouriFalls Church, VirginiaHarrison, MissouriMercer, MissouriSullivan, MissouriLinn, MissouriLewis, MissouriMonroe, MissouriShelby, MissouriAdair, MissouriKnox, MissouriMacon, MissouriRandolph, MissouriScotland, MissouriBarry, MissouriCedar, MissouriDade, MissouriHickory, MissouriPolk, MissouriDallas, MissouriWayne, MissouriPulaski, MissouriWright, MissouriHoward, MissouriMoniteau, MissouriSt. Louis City, MissouriCarter, MissouriCrawford, MissouriIron, MissouriReynolds, MissouriRipley, MissouriBollinger, MissouriOregon, MissouriMadison, MissouriBedford City, VirginiaMcDonald, MissouriCape Girardeau, MissouriNew Madrid, MissouriPerry, MissouriGolden Valley, MontanaWibaux, MontanaSheridan, MontanaDaniels, MontanaRoosevelt, MontanaChouteau, MontanaLiberty, MontanaDakota, NebraskaThurston, NebraskaCheyenne, NebraskaCuster, NebraskaBuffalo, NebraskaKearney, NebraskaPhelps, NebraskaPlatte, NebraskaHamilton, NebraskaMerrick, NebraskaKimball, NebraskaDundy, NebraskaGreeley, NebraskaSherman, NebraskaValley, NebraskaBuena Vista, VirginiaAdams, NebraskaPerkins, NebraskaHall, NebraskaBarbour, West VirginiaPutnam, West VirginiaGreenbrier, West VirginiaJackson, West VirginiaPendleton, West VirginiaGrant, West VirginiaRandolph, West VirginiaHarlan, NebraskaUpshur, West VirginiaLewis, West VirginiaKanawha, West VirginiaHancock, West VirginiaHardy, West VirginiaPreston, West VirginiaMingo, West VirginiaTaylor, West VirginiaNicholas, West VirginiaPleasants, West VirginiaFranklin, NebraskaWebster, NebraskaSeward, NebraskaClay, NebraskaJefferson, NebraskaSaline, NebraskaNance, NebraskaCuming, NebraskaMorrill, NebraskaGage, NebraskaBanner, NebraskaBox Butte, NebraskaDawes, NebraskaScotts Bluff, NebraskaGrant, NebraskaBlaine, NebraskaLogan, NebraskaGarfield, NebraskaLoup, NebraskaPierce, NebraskaWayne, NebraskaBoone, NebraskaMadison, NebraskaPawnee, NebraskaKeith, NebraskaThayer, NebraskaNuckolls, NebraskaWheeler, NebraskaYork, NebraskaAntelope, NebraskaGarden, NebraskaChase, NebraskaFrontier, NebraskaHayes, NebraskaHitchcock, NebraskaGosper, NebraskaRed Willow, NebraskaFurnas, NebraskaNemaha, NebraskaHoward, NebraskaRock, NebraskaDixon, NebraskaWashoe, NevadaStorey, NevadaPershing, NevadaClark, NevadaDouglas, NevadaRockingham, New HampshireCheshire, New HampshireLuna, New MexicoCurry, New MexicoValencia, New MexicoHarding, New MexicoCatron, New MexicoCortland, New YorkYates, New YorkRockland, New YorkCaswell, North CarolinaPerson, North CarolinaHarnett, North CarolinaMoore, North CarolinaScotland, North CarolinaForsyth, North CarolinaAvery, North CarolinaWilkes, North CarolinaMadison, North CarolinaPolk, North CarolinaClay, North CarolinaCleveland, North CarolinaStokes, North CarolinaRockingham, North CarolinaDurham, North CarolinaChatham, North CarolinaLee, North CarolinaTransylvania, North CarolinaSteele, North DakotaMcIntosh, North DakotaSheridan, North DakotaMcKenzie, North DakotaDunn, North DakotaBottineau, North DakotaTowner, North DakotaRenville, North DakotaFoster, North DakotaAdams, North DakotaBowman, North DakotaHettinger, North DakotaSlope, North DakotaBillings, North DakotaGolden Valley, North DakotaEddy, North DakotaWells, North DakotaDickey, North DakotaBarnes, North DakotaGriggs, North DakotaSargent, North DakotaCavalier, North DakotaRansom, North DakotaPierce, North DakotaNelson, North DakotaRolette, North DakotaBurke, North DakotaDivide, North DakotaHarrison, OhioHocking, OhioHolmes, OhioJackson, OhioVinton, OhioTrumbull, OhioKnox, OhioGuernsey, OhioFranklin, OhioMadison, OhioPickaway, OhioDelaware, OhioAuglaize, OhioDefiance, OhioPaulding, OhioVan Wert, OhioDarke, OhioMercer, OhioPreble, OhioChampaign, OhioFayette, OhioLogan, OhioMiami, OhioShelby, OhioClark, OhioClinton, OhioHardin, OhioUnion, OhioMarion, OhioAllen, OhioHenry, OhioPutnam, OhioHancock, OhioSeneca, OhioWyandot, OhioCrawford, OhioHuron, OhioMorrow, OhioWilliams, OhioFulton, OhioMayes, OklahomaCarter, OklahomaCraig, OklahomaBlaine, OklahomaGarfield, OklahomaKingfisher, OklahomaStephens, OklahomaAdair, OklahomaLatimer, OklahomaChoctaw, OklahomaPittsburg, OklahomaCimarron, OklahomaWashington, OklahomaAlfalfa, OklahomaGrant, OklahomaDewey, OklahomaMajor, OklahomaBeckham, OklahomaHarmon, OklahomaOttawa, OklahomaOkfuskee, OklahomaCotton, OklahomaCoal, OklahomaJohnston, OklahomaNowata, OklahomaMalheur, OregonClatsop, OregonWashington, OregonMultnomah, OregonClackamas, OregonHood River, OregonWasco, OregonGilliam, OregonUnion, OregonWallowa, OregonSherman, OregonColumbia, OregonGrant, OregonCrook, OregonLincoln, OregonBenton, OregonWarren, PennsylvaniaCameron, PennsylvaniaMcKean, PennsylvaniaPotter, PennsylvaniaBradford, PennsylvaniaPike, PennsylvaniaMercer, PennsylvaniaSusquehanna, PennsylvaniaLebanon, PennsylvaniaLawrence, PennsylvaniaChester, PennsylvaniaWyoming, PennsylvaniaWashington, PennsylvaniaDelaware, PennsylvaniaAllegheny, PennsylvaniaLackawanna, PennsylvaniaSullivan, PennsylvaniaCambria, PennsylvaniaSchuylkill, PennsylvaniaYork, PennsylvaniaCumberland, PennsylvaniaDauphin, PennsylvaniaWestmoreland, PennsylvaniaNorthumberland, PennsylvaniaLehigh, PennsylvaniaForest, PennsylvaniaClinton, PennsylvaniaBristol, Rhode IslandDeuel, South DakotaHyde, South DakotaClay, South DakotaCampbell, South DakotaWalworth, South DakotaMcPherson, South DakotaTodd, South DakotaMiner, South DakotaBuffalo, South DakotaHand, South DakotaSanborn, South DakotaSpink, South DakotaHanson, South DakotaHamlin, South DakotaHutchinson, South DakotaClark, South DakotaMcCook, South DakotaAurora, South DakotaDouglas, South DakotaJerauld, South DakotaBrule, South DakotaDavison, South DakotaKingsbury, South DakotaBeadle, South DakotaDay, South DakotaMinnehaha, South DakotaMoody, South DakotaPotter, South DakotaBennett, South DakotaFaulk, South DakotaTurner, South DakotaEdmunds, South DakotaCodington, South DakotaBrookings, South DakotaPerkins, South DakotaMarshall, South DakotaLake, South DakotaGrant, South DakotaJackson, South DakotaHaakon, South DakotaHughes, South DakotaButte, South DakotaFall River, South DakotaTrousdale, TennesseeLake, TennesseeCheatham, TennesseeMarshall, TennesseePolk, TennesseeGibson, TennesseeCrockett, TennesseeStewart, TennesseeHouston, TennesseeMontgomery, TennesseeWilson, TennesseeHickman, TennesseeHumphreys, TennesseeBenton, TennesseeDeKalb, TennesseeBradley, TennesseeMacon, TennesseeHardin, TennesseeSequatchie, TennesseeWilliamson, TennesseeCarroll, TennesseeGiles, TennesseeCoffee, TennesseeLauderdale, TennesseeMadison, TennesseeKnox, TennesseeWeakley, TennesseeHardeman, TennesseeGrainger, TennesseeHaywood, TennesseeLewis, TennesseeRobertson, TennesseeJohnson, TennesseeMarion, TennesseeEctor, TexasBrooks, TexasHockley, TexasAndrews, TexasGaines, TexasTerrell, TexasWebb, TexasFort Bend, TexasSan Augustine, TexasJim Hogg, TexasCollingsworth, TexasLynn, TexasJack, TexasLubbock, TexasSterling, TexasGray, TexasHall, TexasBrazoria, TexasSabine, TexasLiberty, TexasPalo Pinto, TexasHarris, TexasGalveston, TexasPanola, TexasGregg, TexasMoore, TexasReagan, TexasRockwall, TexasUpton, TexasComanche, TexasDonley, TexasCallahan, TexasDawson, TexasCoke, TexasFisher, TexasConcho, TexasOldham, TexasMitchell, TexasHartley, TexasKent, TexasIrion, TexasHemphill, TexasSutton, TexasBriscoe, TexasMidland, TexasBailey, TexasLamb, TexasPotter, TexasRoberts, TexasRandall, TexasMotley, TexasDickens, TexasWinkler, TexasKing, TexasParmer, TexasHale, TexasCrosby, TexasGlasscock, TexasCastro, TexasMartin, TexasCochran, TexasCottle, TexasBorden, TexasWheeler, TexasStephens, TexasDeaf Smith, TexasWillacy, TexasAtascosa, TexasLlano, TexasBandera, TexasMcCulloch, TexasKnox, TexasMills, TexasErath, TexasFalls, TexasBlanco, TexasTerry, TexasHoward, TexasDimmit, TexasMenard, TexasKerr, TexasShackelford, TexasLa Salle, TexasStonewall, TexasArcher, TexasGarza, TexasSwisher, TexasScurry, TexasSchleicher, TexasOchiltree, TexasMcMullen, TexasYoung, TexasFrio, TexasZavala, TexasUvalde, TexasNolan, TexasYoakum, TexasEastland, TexasLimestone, TexasSomervell, TexasCoryell, TexasTaylor, TexasHamilton, TexasHood, TexasCarson, TexasKimble, TexasGillespie, TexasDallam, TexasThrockmorton, TexasArmstrong, TexasHutchinson, TexasHaskell, TexasJones, TexasChildress, TexasRunnels, TexasFloyd, TexasBaylor, TexasMason, TexasUtah, UtahCarbon, UtahWeber, UtahIron, UtahSummit, UtahMorgan, UtahJuab, UtahUintah, UtahEmery, UtahWasatch, UtahBeaver, UtahBennington, VermontOrleans, VermontFairfax City, VirginiaFranklin City, VirginiaEmporia, VirginiaSmyth, VirginiaAugusta, VirginiaPowhatan, VirginiaFluvanna, VirginiaMecklenburg, VirginiaChesterfield, VirginiaIsle of Wight, VirginiaCampbell, VirginiaBedford, VirginiaRockingham, VirginiaBuckingham, VirginiaGiles, VirginiaWise, VirginiaPortsmouth, VirginiaMartinsville, VirginiaWinchester, VirginiaCulpeper, VirginiaGreene, VirginiaPrince Edward, VirginiaRoanoke, VirginiaNorthumberland, VirginiaMathews, VirginiaHalifax, VirginiaBland, VirginiaPulaski, VirginiaWaynesboro, VirginiaPetersburg, VirginiaBotetourt, VirginiaHarrisonburg, VirginiaNorton, VirginiaSalem, VirginiaRadford, VirginiaWythe, VirginiaCharlottesville, VirginiaFrederick, VirginiaClarke, VirginiaWhatcom, WashingtonGarfield, WashingtonLincoln, WashingtonKitsap, WashingtonDouglas, WashingtonYakima, WashingtonColumbia, WashingtonIsland, WashingtonStevens, WashingtonFranklin, WashingtonWahkiakum, WashingtonGrays Harbor, WashingtonBrooke, West VirginiaHarrison, West VirginiaLincoln, West VirginiaClay, West VirginiaCalhoun, West VirginiaWayne, West VirginiaMercer, West VirginiaBerkeley, West VirginiaMarion, West VirginiaWirt, West VirginiaOhio, West VirginiaTaylor, WisconsinLincoln, WisconsinEau Claire, WisconsinWaushara, WisconsinPortage, WisconsinVilas, WisconsinBayfield, WisconsinDane, WisconsinMarquette, WisconsinIowa, WisconsinWashington, WisconsinAshland, WisconsinPepin, WisconsinRusk, WisconsinCalumet, WisconsinShawano, WisconsinGreen Lake, WisconsinLanglade, WisconsinSawyer, WisconsinGreen, WisconsinLafayette, WisconsinWashburn, WisconsinKenosha, WisconsinPrice, WisconsinWinnebago, WisconsinRichland, WisconsinWood, WisconsinColumbia, WisconsinIron, WisconsinSublette, WyomingCarbon, Wyoming

Hydrogen potential per county area

LowerHigher

Projected water stress

LowExtremely high

Select a county on the left to inspect hydrogen potential.

Select a watershed on the right to inspect water stress.

Hydrogen potential is normalized by county area and shown in five relative groups. Water stress shows the 2050 business-as-usual projection on watershed polygons. No watershed-to-county aggregation is applied. Boundaries are simplified only for display. Gray indicates arid/low water use or missing data.

04 / Findings

The modeled gains are substantial.

66%

Less freshwater for the modeled hydrogen economy

The paper reports a 66% reduction, with 62–99% across the study cases. The analysis uses the geographic distribution of existing hydrogen users and WRRFs in the contiguous United States. These are scenario results, not measured savings at operating projects. [1]

$758m

Annual national cost savings

Reported savings range from $275 million to $1.162 billion across study cases. This is the combined economic result for WRRF–hydrogen-user pairs, not a guaranteed selling price or profit for either party. [1, 2]

What makes a pair feasible?

Compare the avoided water and sewer bills with the added pipeline, pumping and treatment costs. Economically feasible candidates then enter a multicriteria ranking. [2]

Selected economic assumptions in the study
InputStudy value
Avoided water + sewer charge$2.90/m³ base case; $1.30–4.00/m³ explored
Added feedwater treatment cost$0.00–0.20/m³ explored
Pipeline financial assumptions30-year life; 8% interest rate

Historical study assumptions, not current tariffs or a project quotation. See Supporting Information §§S2–S4. [2]

05 / Scope & limits

A national screen, then a local decision.

What the analysis covers

Hydrogen demand is estimated for refineries and ammonia plants. WRRF information in the optimization comes from CWNS 2012. A location that looks favorable on the context map is not necessarily a feasible reclaimed-water connection. [2]

What still needs investigation

Oxygen from electrolysis could support wastewater aeration; waste heat may offer another connection. The paper identifies these as opportunities for future technical and economic work. Site-level water quality, supply commitments and infrastructure would still need assessment. [1]