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Nevada Hydrographic Regions/Basins
Nevada's Hydrographic Regions (Basins), Areas and Sub-Areas Nevada Division of Water Resources

[1] Northwest Region - Covers 3,052 square miles (7,905 square kilometers or 1,953,280 acres) of northern Washoe and Humboldt counties and encompasses 16 hydrographic areas; extends into the State of California to the west and the State of Oregon to the north;

[2] Black Rock Desert Region - Covers 8,632 square miles (22,357 square kilometers or 5,524,480 acres) of parts of Washoe, Humboldt, and Pershing counties and includes 17 hydrographic areas, two of which are divided into separate hydrographic sub–areas; extends into the State of California to the west and the State of Oregon to the north;

[3] Snake River Basin - Covers 5,230 square miles (13,546 square kilometers or 3,347,200 acres) in parts of Elko and Humboldt counties and includes eight hydrographic areas; extends into the states of Oregon and Idaho to the north and the State of Utah to the east;

[4] Humboldt River Basin - Covers 16,843 square miles (43,623 square kilometers or 10,779,520 acres) in parts of eight counties - Elko, White Pine, Eureka, Humboldt, Lander, Nye, Pershing, and Churchill - and the largest river (Humboldt River) wholly contained within Nevada. This basin contains 34 hydrographic areas and one hydrographic sub–area and is one of only two that are wholly contained within the State of Nevada. It originates in the Ruby, Jarbidge, Independence, and East Humboldt Mountain ranges (Elko County) and terminates in the Humboldt Lake and Sink (Pershing and Churchill counties). During particularly wet years, the Humboldt Sink may drain into the Carson Sink by means of the Humboldt Slough;

[5] West Central Region - Covers 1,656 square miles (4,289 square kilometers or 1,059,840 acres) and includes parts of Pershing, Lyon, and Churchill counties and comprises five hydrographic areas. This basin is one of only two waterbasins that are wholly contained within the State of Nevada;

[6] Truckee River Basin - Encompasses 2,300 square miles (5,957 square kilometers or 1,472,000 acres) containing parts of Washoe, Pershing, Churchill, Lyon, Douglas, Carson City, and Storey counties comprising 12 hydrographic areas; originates in the Sierra Nevada Mountains, the State of California and the Lake Tahoe Basin and terminates in Pyramid Lake (Washoe County);

[7] Western Region - Covers 602 square miles (1,559 square kilometers or 385,280 acres) and is contained only in Washoe County in Nevada; contains nine hydrographic areas, one of which is divided into two sub–areas and another into one hydrographic sub–area; extends to the west into the State of California;

[8] Carson River Basin - Covers 3,519 square miles (9,114 square kilometers or 2,252,160 acres) and includes parts of six counties-Douglas, Carson City, Lyon, Storey, Churchill, and Pershing; contains five hydrographic areas and one sub–area; has its origin to the west in the Sierra Nevada Mountains and the State of California and its terminus in the Carson Sink and Desert (Churchill and Pershing counties);

[9] Walker River Basin - Covers 3,046 square miles (7,889 square kilometers or 1,949,440 acres) of Mineral, Lyon, and Douglas counties (and a very small portion of Churchill County) and includes five hydrographic areas, one of which has been divided into three hydrographic sub–areas; has its origin to the west in the Sierra Nevada Mountains and the State of California and its terminus in Walker Lake (Mineral County);

[10] Central Region - By far the largest hydrographic region in Nevada covering 46,783 square miles (121,167 square kilometers or 29,941,120 acres) in thirteen Nevada counties-Nye, Elko, White Pine, Lincoln, Clark, Humboldt, Pershing, Churchill, Lander, Eureka, Lyon, Mineral, and Esmeralda. This region includes 78 hydrographic areas, ten of which are divided into two sub–areas and one into three sub–areas; extends to the south and west into the State of California;

[11] Great Salt Lake Basin - Covers 3,807 square miles (9,860 square kilometers or 2,436,480 acres) of the easternmost portions of Elko, White Pine, and Lincoln counties; includes eight hydrographic areas, one of which is divided into four hydrographic sub–areas; extends to the east into the State of Utah;

[12] Escalante Desert Basin - Covers a large area in Utah but only a very small part of it is in Lincoln County, Nevada - 106 square miles (275 square kilometers or 67,480 acres). It is made up of only one hydrographic area; extends to the east into the State of Utah;

[13] Colorado River Basin - Covers 12,376 square miles (32,054 square kilometers or 7,920,640 acres) including parts of Clark, Lincoln, Nye, and White Pine counties and is divided into 27 hydrographic areas; extends to the south into California, borders the Colorado River to the south and east, and extends into the states of Arizona and Utah to the east;

[14] Death Valley Basin - Covers 2,593 square miles (6,716 square kilometers or 1,659,520 acres) of Nye and Esmeralda counties including eight hydrographic areas, one of which has been divided into two hydrographic sub–areas; also extends into the State of California to the south and west.

Nevada's 14 Hydrographic Regions and 256 Areas and Sub-Areas:

[1] NORTHWEST REGION (Hydrographic Basin 1)
Basin Num [1] Area Num [2] Size (sq mi) [3] Size (acres) [4] Hydrographic Area/Sub-Area Name Counties Included [5] Nearest Cities Desig [6]
1 1 118 75,520 Pueblo Valley Humboldt Denio No
1 2 214 136,960 Continental Lake Valley Humboldt Denio No
1 3 195 124,800 Gridley Lake Valley Humboldt Denio, Summit Lake No
1 4 494 316,160 Virgin Valley Humboldt, Washoe Denio No
1 5 22 14,080 Sage Hen Valley Humboldt Denio No
1 6 147 94,080 Guano Valley Washoe, Humboldt Denio, Vya No
1 7 226 144,640 Swan Lake Valley Washoe, Humboldt Denio No
1 8 176 112,640 Massacre Lake Valley Washoe Vya, Cedarville No
1 9 433 277,120 Long Valley Washoe Vya, Cedarville No
1 10 27 17,280 Macy Flat Washoe Vya No
1 11 51 32,640 Coleman Valley Washoe Vya No
1 12 32 20,480 Mosquito Valley Washoe Vya No
1 13 82 52,480 Warner Valley Washoe Vya No
1 14 214 136,960 Surprise Valley Washoe Vya, Cedarville No
1 15 88 56,320 Boulder Valley Washoe Vya, Cedarville No
1 16 533 341,120 Duck Lake Valley Washoe Gerlach No
  Total 3,052 1,953,280 Square miles/acres      
[2] BLACK ROCK DESERT REGION (Hydrographic Basin 2):
Basin Num [1] Area Num [2] Size (sq mi) [3] Size (acres) [4] Hydrographic Area/Sub-Area Name Counties Included [5] Nearest Cities Desig [6]
2 17 12 7,680 Pilgrim Flat Washoe Gerlach No
2 18 31 19,840 Painter Flat Washoe Gerlach No
2 19 39 24,960 Dry Valley Washoe Gerlach, Sutcliffe No
2 20 12 7,680 Sano Valley Washoe Sano, Smoke Creek No
2 21 980 627,200 Smoke Creek Desert Washoe Gerlach, Smoke Creek No
2 22 305 195,200 San Emidio Desert Washoe, Pershing Empire, Gerlach Yes
2 23 9 5,760 Granite Basin Washoe Gerlach No
2 24 315 201,600 Hualapai Flat Washoe, Humboldt, Pershing Gerlach No
2 25 665 425,600 High Rock Lake Valley Washoe, Humboldt Vya, Gerlach No
2 26 495 316,800 Mud Meadow Humboldt Summit Lake No
2 27 60 38,400 Summit Lake Valley Humboldt Summit Lake No
2 28 2,179 1,394,560 Black Rock Desert Humboldt, Pershing, Washoe Sulfur, Jungo, Summit Lake No
2 29 528 337,920 Pine Forest Valley Humboldt Denio Yes
2 30A 300 192,000 Kings River Valley/Rio King Sub-Area Humboldt Orovada Yes
2 30B 113 72,320 Kings River Valley/Sod House Sub-Area Humboldt McDermitt Yes
2 31 1,052 673,280 Desert Valley Humboldt, Pershing Jungo, Winnemucca Yes
2 32 313 200,320 Silver State Valley Humboldt Winnemucca Yes
2 33A 632 404,480 Quinn River Valley/Orovada Sub-Area Humboldt McDermitt Yes
2 33B 592 378,880 Quinn River Valley/McDermitt Sub-Area Humboldt McDermitt Yes
  Total 8,632 5,524,480 Square miles/acres      
[3] SNAKE RIVER BASIN (Hydrographic Basin 3):
Basin Num [1] Area Num [2] Size (sq mi) [3] Size (acres) [4] Hydrographic Area/Sub-Area Name Counties Included [5] Nearest Cities Desig [6]
3 34 716 458,240 Little Owyhee River Area Elko, Humboldt McDermitt No
3 35 1,310 838,400 South Fork Owyhee River Area Elko Jack Creek, Tuscarora No
3 36 345 220,800 Independence Valley Elko Tuscarora No
3 37 533 341,120 Owyhee River Area Elko Owyhee, Mountain City No
3 38 514 328,960 Bruneau River Area Elko Mountain City, Jarbidge No
3 39 278 177,920 Jarbidge River Area Elko Jarbidge No
3 40 1,218 779,520 Salmon Creek Area Elko Jackpot, Contact Yes
3 41 316 202,240 Goose Creek Area Elko Jackpot No
  Total 5,230 3,347,200 Square miles/acres      
[4] HUMBOLDT RIVER BASIN (Hydrographic Basin 4):
Basin Num [1] Area Num [2] Size (sq mi) [3] Size (acres) [4] Hydrographic Area/Sub-Area Name Counties Included [5] Nearest Cities Desig [6]
4 42 1,073 686,720 Marys River Area Elko Wells, Deeth Yes
4 43 332 212,480 Starr Valley Elko Halleck, Deeth Yes
4 44 1,110 710,400 North Fork Area Elko North Fork, Halleck Yes
4 45 257 164,480 Lamoille Valley Elko Lamoille, Elko Yes
4 46 99 63,360 South Fork Area Elko Lamoille, Jiggs Yes
4 47 787 503,680 Huntington Valley Elko, White Pine Jiggs Yes
4 48 392 250,880 Dixie Creek Area-Tenmile Creek Area Elko Elko, Spring Valley Yes
4 49 314 200,960 Elko Segment Elko, Eureka Elko Yes
4 50 223 142,720 Susie Creek Area Elko, Eureka Carlin Yes
4 51 396 253,440 Maggie Creek Area Elko, Eureka Carlin Yes
4 52 61 39,040 Marys Creek Area Eureka, Elko Palisade, Carlin Yes
4 53 1,002 641,280 Pine Valley Eureka, Elko Carlin Yes
4 54 752 481,280 Crescent Valley Eureka, Lander Beowawe, Crescent Valley Yes
4 55 376 240,640 Carico Lake Valley Lander Austin, Crescent Valley No
4 56 1,138 728,320 Upper Reese River Valley Lander, Nye Austin Yes
4 57 452 289,280 Antelope Valley Lander Austin Yes
4 58 319 204,160 Middle Reese River Valley Lander Austin Yes
4 59 588 376,320 Lower Reese River Valley Lander, Eureka Austin, Ione No
4 60 94 60,160 Whirlwind Valley Eureka, Lander Beowawe, Dunphy Yes
4 61 544 348,160 Boulder Flat Eureka, Lander, Elko Beowawe, Battle Mountain Yes
4 62 444 284,160 Rock Creek Valley Elko, Lander, Eureka Battle Mountain No
4 63 405 259,200 Willow Creek Elko Midas No
4 64 720 460,800 Clovers Area Humboldt, Lander, Elko Battle Mountain Yes
4 65 299 191,360 Pumpernickel Valley Humboldt, Pershing Golconda, Valmy No
4 66 301 192,640 Kelley Creek Valley Humboldt, Elko Golconda Yes
4 67 975 624,000 Little Humboldt Valley Humboldt, Elko Paradise Valley No
4 68 167 106,880 Hardscrabble Area Humboldt Paradise Valley No
4 69 600 384,000 Paradise Valley Humboldt Paradise Valley, Winnemucca Yes
4 70 435 278,400 Winnemucca Segment Humboldt Winnemucca, Golconda Yes
4 71 520 332,800 Grass Valley Pershing, Humboldt Winnemucca Yes
4 72 771 493,440 Imlay Area Pershing Imlay, Humboldt, Mill City Yes
4 73 635 406,400 Lovelock Valley Pershing, Churchill Rye Patch, Lovelock Yes
4 73A 98 62,720 Lovelock Valley/Oreana Sub-Area Pershing Lovelock, Toulon No
4 74 164 104,960 White Plains Churchill, Pershing Lovelock, Fernley Yes
  Total 16,843 10,779,520 Square miles/acres      
[5] WEST CENTRAL REGION (Hydrographic Basin 5):
Basin Num [1] Area Num [2] Size (sq mi) [3] Size (acres) [4] Hydrographic Area/Sub-Area Name Counties Included [5] Nearest Cities Desig [6]
5 75 178 113,920 Brady Hot Springs Area Churchill, Lyon Bradys Hot Springs, Fernley Yes
5 76 120 76,800 Fernley Area Lyon, Washoe, Storey, Churchill Fernley, Hazen Yes
5 77 58 37,120 Fireball Valley Churchill Nixon, Fernley No
5 78 967 618,880 Granite Springs Valley Pershing, Churchill Lovelock, Gerlach No
5 79 333 213,120 Kumiva Valley Pershing Gerlach No
  Total 1,656 1,059,840 Square miles/acres      
[6] TRUCKEE RIVER BASIN (Hydrographic Basin 6):
Basin Num [1] Area Num [2] Size (sq mi) [3] Size (acres) [4] Hydrographic Area/Sub-Area Name Counties Included [5] Nearest Cities Desig [6]
6 80 371 237,440 Winnemucca Lake Valley Pershing, Washoe, Churchill Nixon, Gerlach No
6 81 672 430,080 Pyramid Lake Valley Washoe, Churchill Nixon, Sutcliffe No
6 82 92 58,880 Dodge Flat Washoe, Churchill Wadsworth No
6 83 285 182,400 Tracy Segment Storey, Washoe, Lyon Sparks, Fernley Yes
6 84 247 158,080 Warm Springs Valley Washoe Sparks Yes
6 85 76 48,640 Spanish Springs Valley Washoe Sparks, Reno Yes
6 86 10 6,400 Sun Valley Washoe Sun Valley, Sparks Yes
6 87 203 129,920 Truckee Meadows Washoe, Storey Reno, Sparks Yes
6 88 39 24,960 Pleasant Valley Washoe Reno, Washoe City Yes
6 89 82 52,480 Washoe Valley Washoe Washoe City Yes
6 90 139 88,960 Lake Tahoe Basin Douglas, Washoe, Carson City Incline Village, Glenbrook, Stateline Yes
6 91 84 53,760 Truckee Canyon Segment Washoe Verdi Yes
  Total 2,300 1,472,000 Square miles/acres      
[7] WESTERN REGION (Hydrographic Basin 7):
Basin Num [1] Area Num [2] Size (sq mi) [3] Size (acres) [4] Hydrographic Area/Sub-Area Name Counties Included [5] Nearest Cities Desig [6]
7 92A 53 33,920 Lemmon Valley/Western Part Washoe Lemmon Valley, Reno Yes
7 92B 40 25,600 Lemmon Valley/Eastern Part Washoe Lemmon Valley, Reno Yes
7 93 18 11,520 Antelope Valley Washoe Lemmon Valley, Sparks Yes
7 94 53 33,920 Bedell Flat Washoe Lemmon Valley Yes
7 95 80 51,200 Dry Valley Washoe D0Yle No
7 96 9 5,760 Newcomb Lake Valley Washoe Doyle No
7 97 193 123,520 Honey Lake Valley Washoe Flanigan, Doyle Yes
7 98 43 27,520 Skedaddle Creek Valley Washoe Smoke Creek, Doyle No
7 99 58 37,120 Red Rock Valley Washoe Bordertown, Lemmon Valley Yes
7 100 30 19,200 Cold Springs Valley Washoe Bordertown, Lemmon Valley Yes
7 100A 25 16,000 Cold Springs Valley/Long Valley Washoe Bordertown Yes
  Total 602 385,280 Square miles/acres      
[8] CARSON RIVER BASIN (Hydrographic Basin 8):
Basin Num [1] Area Num [2] Size (sq mi) [3] Size (acres) [4] Hydrographic Area/Sub-Area Name Counties Included [5] Nearest Cities Desig [6]
8 101 2,022 1,294,080 Carson Desert Churchill, Pershing, Lyon Fallon, Stillwater Yes
8 101A 160 102,400 Carson Desert/Parkard Valley Pershing Lovelock Yes
8 102 480 307,200 Churchill Valley Lyon, Churchill, Douglas, Storey Fallon Yes
8 103 369 236,160 Dayton Valley Lyon, Storey, Carson City, Douglas Dayton, Virginia City Yes
8 104 69 44,160 Eagle Valley Carson City, Douglas Carson City Yes
8 105 419 268,160 Carson Valley Douglas, Carson City Minden, Gardnerville Yes
  Total 3,519 2,252,160 Square miles/acres      
[9] WALKER RIVER BASIN (Hydrographic Basin 9):
Basin Num [1] Area Num [2] Size (sq mi) [3] Size (acres) [4] Hydrographic Area/Sub-Area Name Counties Included [5] Nearest Cities Desig [6]
9 106 115 73,600 Antelope Valley Douglas Topaz, Wellington Yes
9 107 479 306,560 Smith Valley Lyon, Douglas Wellington Yes
9 108 516 330,240 Mason Valley Lyon, Mineral, Douglas Yerington, Mason Yes
9 109 586 375,040 East Walker Area Lyon, Mineral Bridgeport, Yerington No
9 110A 502 321,280 Walker Lake Valley/Schurz Sub-Area Mineral, Lyon, Churchill Schurz No
9 110B 307 196,480 Walker Lake Valley/Lake Sub-Area Mineral Walker Lake, Hawthorne, Schurz No
9 110C 541 346,240 Walker Lake Valley/Whiskey Flat-Hawthorne Sub-Area Mineral Hawthorne, Babbit Yes
  Total 3,046 1,949,440 Square miles/acres      
[10] CENTRAL REGION (Hydrographic Basin 10):
Basin Num [1] Area Num [2] Size (sq mi) [3] Size (acres) [4] Hydrographic Area/Sub-Area Name Counties Included [5] Nearest Cities Desig [6]
10 111A 18 11,520 Alkali Valley/Northern Part Mineral Hawthorne No
10 111B 65 41,600 Alkali Valley/Southern Part Mineral Hawthorne No
10 112 27 17,280 Mono Valley Mineral Hawthorne No
10 113 97 62,080 Huntoon Valley Mineral Hawthorne No
10 114 323 206,720 Teels Marsh Valley Mineral Mina, Benton Station No
10 115 15 9,600 Adobe Valley Mineral Benton Station, Mina No
10 116 65 41,600 Queen Valley Mineral, Esmeralda Fish Lake Valley, Benton Station No
10 117 706 451,840 Fish Lake Valley Esmeralda Fish Lake Valley, Dyer Yes
10 118 370 236,800 Columbus Salt Marsh Valley Esmeralda, Mineral Fish Lake Valley, Mina No
10 119 199 127,360 Rhodes Salt Marsh Valley Mineral Mina No
10 120 92 58,880 Garfield Flat Mineral Mina, Hawthorne No
10 121A 246 157,440 Soda Springs Valley/Eastern Part Mineral Luning, Mina Yes
10 121B 130 83,200 Soda Springs Valley/Western Part Mineral Luning, Hawthorne Yes
10 122 1,277 817,280 Gabbs Valley Mineral, Nye, Churchill Gabbs Yes
10 123 227 145,280 Rawhide Flats Churchill, Mineral, Lyon Schurz, Fallon No
10 124 285 182,400 Fairview Valley Churchill, Mineral Frenchman, Fallon, Eastgate Yes
10 125 43 27,520 Stingaree Valley Churchill Frenchman, Eastgate Yes
10 126 110 70,400 Cowkick Valley Churchill Frenchman, Eastgate Yes
10 127 216 138,240 Eastgate Valley Area Churchill Eastgate Yes
10 128 1,303 833,920 Dixie Valley Churchill, Pershing, Lander Dixie Valley, Fallon Yes
10 129 742 474,880 Buena Vista Valley Pershing, Churchill Unionville, Lovelock Yes
10 130 285 182,400 Pleasant Valley Pershing Dixie Valley, Winnemucca Yes
10 131 504 322,560 Buffalo Valley Pershing, Lander, Humboldt Battle Mountain, Winnemucca No
10 132 142 90,880 Jersey Valley Pershing, Lander Dixie Valley, Battle Mountain Yes
10 133 416 266,240 Edwards Creek Valley Churchill Eastgate, Austin No
10 134 582 372,480 Smith Creek Lander, Nye Austin, Eastgate No
10 135 460 294,400 Ione Valley Nye, Mineral Gabbs, Ione No
10 136 284 181,760 Monte Cristo Valley Esmeralda, Mineral Mina, Tonopah No
10 137A 1,603 1,025,920 Big Smoky Valley/Tonopah Flat Nye, Esmeralda, Mineral Tonopah, Manhattan Yes
10 137B 1,323 846,720 Big Smoky Valley/Northern Part Nye, Lander Round Mountain, Austin Yes
10 138 595 380,800 Grass Valley Lander, Eureka Austin No
10 139 868 555,520 Kobeh Valley Eureka, Lander Eureka Yes
10 140A 529 338,560 Monitor Valley/Northern Part Nye, Lander, Eureka Austin No
10 140B 509 325,760 Monitor Valley/Southern Part Nye Round Mountain, Tonopah No
10 141 971 621,440 Ralston Valley Nye, Esmeralda Tonopah Yes
10 142 313 200,320 Alkali Spring Valley Esmeralda, Nye Goldfield, Tonopah No
10 143 555 355,200 Clayton Valley Esmeralda Silverpeak No
10 144 535 342,400 Lida Valley Esmeralda, Nye Lida, Goldfield No
10 145 381 243,840 Stonewall Flat Nye, Esmeralda Goldfield No
10 146 812 519,680 Sarcobatus Flat Nye, Esmeralda Scottys Junction, Beatty Yes
10 147 684 437,760 Gold Flat Nye Goldfield No
10 148 403 257,920 Cactus Flat Nye Goldfield, Warm Springs No
10 149 985 630,400 Stone Cabin Valley Nye Tonopah, Warm Springs Yes
10 150 434 277,760 Little Fish Lake Valley Nye Eureka, Warm Springs No
10 151 444 284,160 Antelope Valley Eureka, Nye Eureka No
10 152 17 10,880 Stevens Basin Eureka Eureka No
10 153 752 481,280 Diamond Valley Eureka, Elko, White Pine Eureka, Austin Yes
10 154 801 512,640 Newark Valley White Pine, Eureka Eureka No
10 155A 591 378,240 Little Smoky Valley/Northern Part Nye, Eureka, White Pine Eureka No
10 155B 57 36,480 Little Smoky Valley/Central Part Nye Duckwater, Eureka No
10 155C 510 326,400 Little Smoky Valley/Southern Part Nye Duckwater, Eureka No
10 156 1,036 663,040 Hot Creek Nye Warm Springs No
10 157 350 224,000 Kawich Valley Nye Warm Springs No
10 158A 663 424,320 Emigrant Valley/Groom Lake Valley Lincoln, Nye Tempiute No
10 158B 104 66,560 Emigrant Valley/Papoose Valley Lincoln, Nye Indian Springs, Mercury No
10 159 305 195,200 Yucca Flat Nye Mercury No
10 160 463 296,320 Frenchman Flat Nye, Lincoln, Clark Mercury No
10 161 655 419,200 Indian Springs Valley Clark, Lincoln, Nye Indian Springs Yes
10 162 789 504,960 Pahrump Valley Clark, Nye Pahrump, Las Vegas Yes
10 163 236 151,040 Mesquite Valley (Sandy Valley) Clark Goodsprings, Las Vegas Yes
10 164A 253 161,920 Ivanpah Valley/Northern Part Clark Roach, Searchlight Yes
10 164B 73 46,720 Ivanpah Valley/Southern Part Clark Jean, Roach, Goodsprings Yes
10 165 96 61,440 Jean Lake Valley Clark Jean, Goodsprings Yes
10 166 34 21,760 Hidden Valley Clark Henderson, Jean Yes
10 167 530 339,200 Eldorado Valley Clark Boulder City, Searchlight Yes
10 168 298 190,720 Three Lakes Valley-Northern Part Lincoln, Clark Indian Springs No
10 169A 607 388,480 Tikapoo Valley/Northern Part Lincoln Hiko, Tempiute No
10 169B 391 250,240 Tikapoo Valley/Southern Part Lincoln, Clark Alamo, Indian Springs No
10 170 700 448,000 Penoyer Valley (Sand Spring Valley) Lincoln, Nye Hiko, Warm Springs Yes
10 171 460 294,400 Coal Valley Lincoln, Nye Tempiute No
10 172 493 315,520 Garden Valley Nye, Lincoln Sunnyside, Tempiute No
10 173A 603 385,920 Railroad Valley/Southern Part Nye, Lincoln Tempiute, Warm Springs No
10 173B 2,149 1,375,360 Railroad Valley/Northern Part Nye, White Pine, Lincoln Currant, Duckwater No
10 174 422 270,080 Jakes Valley White Pine Ely, Eureka No
10 175 651 416,640 Long Valley White Pine, Elko Ely, Eureka No
10 176 1,004 642,560 Ruby Valley Elko, White Pine Elko, Ruby Valley Yes
10 177 464 296,960 Clover Valley Elko Wells, Ruby Valley Yes
10 178A 271 173,440 Butte Valley/Northern Part Elko Currie, Ruby Valley No
10 178B 739 472,960 Butte Valley/Southern Part White Pine, Elko Cherry Creek, Ely No
10 179 1,942 1,242,880 Steptoe Valley White Pine, Elko Ely, Cherry Creek Yes
10 180 362 231,680 Cave Valley Lincoln, White Pine Sunnyside, Preston No
10 181 882 564,480 Dry Lake Valley Lincoln Caliente, Pioche No
10 182 383 245,120 Delamar Valley Lincoln Caliente, Hiko No
10 183 557 356,480 Lake Valley Lincoln, White Pine Ely, Pioche Yes
10 184 1,661 1,063,040 Spring Valley White Pine, Lincoln Ely, Baker No
10 185 345 220,800 Tippett Valley White Pine Tippett No
10 186A 125 80,000 Antelope Valley/Southern Part Elko, White Pine Wendover, Ely No
10 186B 270 172,800 Antelope Valley/Northern Part Elko, White Pine Wendover, Ely No
10 187 954 610,560 Goshute Valley Elko Oasis, Shafter Yes
10 188 562 359,680 Independence Valley (Pequop Valley) Elko Wells, Oasis Yes
  Total 46,783 29,941,120 Square miles/acres      
[11] GREAT SALT LAKE BASIN (Hydrographic Basin 11):
Basin Num [1] Area Num [2] Size (sq mi) [3] Size (acres) [4] Hydrographic Area/Sub-Area Name Counties Included [5] Nearest Cities Desig [6]
11 189A 163 104,320 Thousand Springs Valley/ Herrill Siding-Brush Creek Area Elko Wells, Contact Yes
11 189B 618 395,520 Thousand Springs Valley/ Toano-Rock Spring Area Elko Jackpot, Wells Yes
11 189C 183 117,120 Thousand Springs Valley/ Rocky Butte Area Elko Montello, Jackpot Yes
11 189D 482 308,480 Thousand Springs Valley/ Montello-Crittenden Creek Area Elko Montello Yes
11 190 55 35,200 Grouse Creek Valley Elko Grouse Creek, Jackpot No
11 191 326 208,640 Pilot Creek Valley Elko Wendover Yes
11 192 507 324,480 Great Salt Lake Desert Elko Wendover No
11 193 208 133,120 Deep Creek Valley White Pine, Elko Wendover No
11 194 75 48,000 Pleasant Valley White Pine Baker, Wendover No
11 195 777 497,280 Snake Valley White Pine Baker No
11 196 413 264,320 Hamlin Lincoln, White Pine Baker, Pioche No
  Total 3,807 2,436,480 Square miles/acres      
[12] ESCALANTE DESERT BASIN (Hydrographic Basin 12):
Basin Num [1] Area Num [2] Size (sq mi) [3] Size (acres) [4] Hydrographic Area/Sub-Area Name Counties Included [5] Nearest Cities Desig [6]
12 197 106 67,840 Escalante Desert Lincoln Panaca No
  Total 106 67,840 Square miles/acres      
[13] COLORADO RIVER BASIN (Hydrographic Basin 13):
Basin Num [1] Area Num [2] Size (sq mi) [3] Size (acres) [4] Hydrographic Area/Sub-Area Name Counties Included [5] Nearest Cities Desig [6]
13 198 113 72,320 Dry Valley Lincoln Panaca, Pioche No
13 199 12 7,680 Rose Valley Lincoln Pioche, Ursine No
13 200 52 33,280 Eagle Valley Lincoln Pioche, Ursine No
13 201 287 183,680 Spring Valley Lincoln Pioche, Ursine No
13 202 418 267,520 Patterson Valley Lincoln Pioche No
13 203 334 213,760 Panaca Valley Lincoln Panaca, Pioche Yes
13 204 364 232,960 Clover Valley Lincoln Caliente No
13 205 979 626,560 Lower Meadow Valley Wash Lincoln, Clark Caliente, Moapa Yes
13 206 234 149,760 Kane Springs Valley Lincoln Caliente, Moapa No
13 207 1,607 1,028,480 White River Valley Nye, White Pine, Lincoln Preston, Sunnyside No
13 208 508 325,120 Pahroc Valley Lincoln, Nye Hiko, Sunnyside No
13 209 768 491,520 Pahranagat Valley Lincoln Hiko, Alamo No
13 210 657 420,480 Coyote Springs Valley Lincoln, Clark Moapa, Alamo Yes
13 211 311 199,040 Three Lakes Valley-Southern Part Clark Indian Springs Yes
13 212 1,564 1,000,960 Las Vegas Valley Clark Las Vegas, Henderson Yes
13 213 563 360,320 Colorado River Valley Clark Laughlin, Boulder City Yes
13 214 338 216,320 Piute Valley Clark Searchlight Yes
13 215 630 403,200 Black Mountains Area Clark Boulder City, Overton Yes
13 216 156 99,840 Garnet Valley Clark North Las Vegas, Moapa No
13 217 80 51,200 Hidden Valley Clark North Las Vegas, Moapa No
13 218 318 203,520 California Wash Clark Moapa No
13 219 91 58,240 Muddy River Springs Area Clark, Lincoln Moapa, Overton Yes
13 220 252 161,280 Lower Moapa Valley Clark, Lincoln Logandale, Overton Yes
13 221 192 122,880 Tule Desert Lincoln Caliente, Mesquite No
13 222 907 580,480 Virgin River Valley Lincoln, Clark Mesquite, Bunkerville Yes
13 223 533 341,120 Gold Butte Area Clark Overton, Logandale No
13 224 108 69,120 Greasewood Area Clark Bunkerville, Overton No
  Total 12,376 7,920,640 Square miles/acres      
[14] DEATH VALLEY BASIN (Hydrographic Basin 14):
Basin Num [1] Area Num [2] Size (sq mi) [3] Size (acres) [4] Hydrographic Area/Sub-Area Name Counties Included [5] Nearest Cities Desig [6]
14 225 110 70,400 Mercury Valley Nye Indian Springs No
14 226 82 52,480 Rock Valley Nye Amargosa Valley No
14 227A 279 178,560 Fortymile Canyon/Jackass Flats Nye Lathrop Wells No
14 227B 240 153,600 Fortymile Canyon/Buckboard Mesa Nye Lathrop Wells No
14 228 460 294,400 Oasis Valley Nye Beatty Yes
14 229 182 116,480 Crater Flat Nye Lathrop Wells, Beatty No
14 230 896 573,440 Amargosa Desert Nye Beatty, Lathrop Wells Yes
14 231 162 103,680 Grapevine Canyon Esmeralda, Nye Scottys Junction No
14 232 182 116,480 Oriental Wash Esmeralda Lida, Goldpoint No
  Total 2,593 1,659,520 Square miles/acres      
NEVADA TOTAL-ALL HYDROGRAPHIC REGIONS/BASINS
  Total 110,545 70,748,800 Square miles/acres      

Hydrographic Regions, Areas, and Sub–Areas Table Notes:
A Basin is defined as a geographic area drained by a single major stream or an area consisting of a drainage system comprised of streams and often natural or man–made lakes. Also referred to as Drainage Basin, Watershed, or Hydrographic Region. The U.S. Geological Survey and the Nevada Division of Water Resources, Department of Conservation and Natural Resources, have divided the state into discrete hydrologic units for WaterPlanning and management purposes. These have been identified as 232 Hydrographic Areas (256 areas and sub–areas, combined) within 14 major Hydrographic Regions or Basins.
[1] Nevada Hydrographic Basin Number (1–14).
[2] Nevada Hydrographic Area/Sub–Area Number (1–232; hydrographic sub–areas designated A, B, C, etc.). There are a total of 256 hydrographic areas and sub–areas.
[3] and [4] Hydrographic areas and sub–areas in square miles and acres, respectively, and include acreage only contained within Nevada.
[5] Counties are listed in order of their share of the hydrographic area/sub–area.
[6] Desig = Designated Groundwater Basin (Area or Sub–Area). Designated groundwater basins are basins where permitted ground water rights approach or exceed the estimated average annual recharge and the water resources are being depleted or require additional administration. Under such conditions, a state's water officials will so designate a groundwater basin and, in the interest of public welfare, declare preferred uses (e.g., municipal and industrial, domestic, agriculture, etc.). Also referred to as Administered Groundwater Basins. For Nevada, in the interest of public welfare, the Nevada State Engineer, Division of Water Resources, Department of Conservation and Natural Resources, is authorized by statute (Nevada Revised Statute 534.120) and directed to designate a groundwater basin and declare preferred uses within such designated basin. The State Engineer has additional authority in the administration of the water resources within a designated groundwater basin.
Source Data: Office of the State Engineer, Nevada Division of Water Resources, Department of Conservation and Natural Resources.

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