Wyoming tap water quality
317 community water systems
4.7%
exceed lead action level
(15/316 systems)
(15/316 systems)
100%
PFOA/PFOS detected
(1/1 systems)
(1/1 systems)
Largest water systems
Lead is the LCR 90th-percentile result; a value above 0.015 mg/L exceeds the
EPA action level. “—” means no lead sample is on file for that system.
| System | City | Population | Lead (p90) |
|---|---|---|---|
| CHEYENNE BOARD OF PUBLIC UTILITIES | CHEYENNE | 64,165 | 0.0097 mg/L |
| CASPER, CITY OF | CASPER | 59,000 | 0.0056 mg/L |
| LARAMIE, CITY OF | LARAMIE | 32,395 | 0.0060 mg/L |
| GILLETTE, CITY OF | GILLETTE | 32,222 | 0.0062 mg/L |
| JACKSON, TOWN OF | JACKSON | 24,760 | 0.0050 mg/L |
| ROCK SPRINGS, CITY OF | ROCK SPRINGS | 24,000 | 0.0071 mg/L |
| SHERIDAN, CITY OF | SHERIDAN | 22,700 | 0.0043 mg/L |
| EVANSTON, CITY OF | EVANSTON | 11,727 | 0.0031 mg/L |
| GREEN RIVER, CITY OF | GREEN RIVER | 10,500 | 0.0071 mg/L |
| RIVERTON, CITY OF | RIVERTON | 10,330 | 0.0050 mg/L |
| CODY, CITY OF | CODY | 10,224 | 0.0021 mg/L |
| SOUTH CHEYENNE WATER & SEWER DISTRICT | CHEYENNE | 10,000 | 0.0150 mg/L |
| RAWLINS WATER SUPPLY, CITY OF | RAWLINS | 9,006 | 0.0040 mg/L |
| YNP-OLD FAITHFUL | YELLOWSTONE NP | 7,675 | 0.0125 mg/L |
| LANDER, CITY OF | LANDER | 7,615 | 0.0080 mg/L |
| NORTHWEST RURAL WATER DISTRICT | CODY | 7,330 | 0.0030 mg/L |
| TORRINGTON MUNICIPAL WATER DEPT, CITY OF | TORRINGTON | 6,847 | 0.0100 mg/L |
| DOUGLAS, CITY OF | DOUGLAS | 6,400 | 0.0060 mg/L |
| POWELL, CITY OF | POWELL | 6,310 | 0.0021 mg/L |
| YNP - LAKE VILLAGE | YELLOWSTONE NT | 5,925 | 0.0150 mg/L |
| USAF F.E. WARREN AFB | CHEYENNE | 5,500 | 0.1254 mg/L |
| WORLAND UTILITIES COMMISSION | WORLAND | 4,787 | 0.0041 mg/L |
| GTNP-COLTER BAY VILLAGE | MOOSE | 4,514 | 0.0104 mg/L |
| BUFFALO, CITY OF | BUFFALO | 4,419 | 0.0320 mg/L |
| ARAPAHOE COMM WATER SYSTEM | 4,100 | 0.0003 mg/L | |
| MILLS, CITY OF | MILLS | 4,050 | 0.0010 mg/L |
| BAR NUNN, TOWN OF | MILLS | 4,000 | 0.0020 mg/L |
| WHEATLAND, TOWN OF | WHEATLAND | 3,659 | 0.0047 mg/L |
| NEWCASTLE, CITY OF | NEWCASTLE | 3,595 | 0.0038 mg/L |
| KEMMERER-DIAMONDVILLE JPB | KEMMERER | 3,348 | 0.0060 mg/L |
| WRIGHT WATER & SEWER DISTRICT | WRIGHT | 3,207 | 0.0063 mg/L |
| WHITE MOUNTAIN W&S DISTRICT | ROCK SPRINGS | 3,000 | 0.0071 mg/L |
| EVANSVILLE, TOWN OF | EVANSVILLE | 2,873 | 0.0020 mg/L |
| THERMOPOLIS, TOWN OF | THERMOPOLIS | 2,775 | 0.0256 mg/L |
| FORT WASHAKIE | 2,620 | 0.0076 mg/L | |
| YNP-MAMMOTH HOT SPRINGS | YELLOWSTONE NP | 2,600 | 0.0030 mg/L |
| GLENROCK, TOWN OF | GLENROCK | 2,466 | 0.0044 mg/L |
| SLEEPY HOLLOW SUBDIVISION | GILLETTE | 2,400 | 0.0028 mg/L |
| LOVELL, TOWN OF | LOVELL | 2,250 | 0.0021 mg/L |
| LYMAN, TOWN OF | LYMAN | 2,203 | 0.0042 mg/L |
| GREYBULL, TOWN OF | GREYBULL | 2,080 | 0.0024 mg/L |
| STAR VALLEY RANCH, TOWN OF | STAR VALLEY RANCH | 2,030 | 0.0088 mg/L |
| LITTLE AMERICA HOTELS & RESORTS, INC- WY | LITTLE AMERICA | 2,004 | 0.0104 mg/L |
| AFTON, BOARD OF PUB UTILITIES | AFTON | 2,000 | 0.0022 mg/L |
| ETHETE WATER SYSTEM | 1,950 | 0.0030 mg/L | |
| LEISURE VALLEY INC/ STAR VALLEY RV PARK | THAYNE | 1,910 | 0.0124 mg/L |
| PINEDALE MUNICIPAL WS | PINEDALE | 1,900 | 0.0156 mg/L |
| GTNP-JACKSON LAKE LODGE | MOOSE | 1,830 | 0.0067 mg/L |
| DUBOIS, TOWN OF | DUBOIS | 1,822 | 0.0104 mg/L |
| BRIDGER VALLEY JOINT POWERS BOARD | LYMAN | 1,728 | 0.0056 mg/L |
| SARATOGA, TOWN OF | SARATOGA | 1,720 | 0.0042 mg/L |
| VISTA WEST WATER COMPANY | CASPER | 1,600 | 0.0023 mg/L |
| LUSK, TOWN OF | LUSK | 1,576 | 0.0020 mg/L |
| PIONEER WATER & SEWER DISTRICT | MILLS | 1,500 | 0.0020 mg/L |
| RAFTER J SUBDIVISION HOA | JACKSON | 1,500 | 0.0030 mg/L |
| ASPENS PINES W&S DISTRICT | JACKSON | 1,400 | 0.0042 mg/L |
| ALPINE, TOWN OF | ALPINE | 1,300 | 0.0130 mg/L |
| RANCHESTER, TOWN OF | RANCHESTER | 1,297 | 0.0008 mg/L |
| ANTELOPE VALLEY I&S DISTRICT (AVISD) | GILLETTE | 1,280 | 0.0026 mg/L |
| SUNDANCE, CITY OF | SUNDANCE | 1,279 | 0.0050 mg/L |
| BASIN, TOWN OF | BASIN | 1,250 | 0.0188 mg/L |
| MOUNTAIN VIEW, TOWN OF | MOUNTAIN VIEW | 1,250 | 0.0039 mg/L |
| BEAR RIVER REGIONAL JOINT POWERS | EVANSTON | 1,200 | 0.0026 mg/L |
| GUERNSEY, TOWN OF | GUERNSEY | 1,157 | 0.0030 mg/L |
| UPTON, TOWN OF | UPTON | 1,100 | 0.0034 mg/L |
| WINCHESTER HILLS | CHEYENNE | 1,078 | 0.0022 mg/L |
| BURNS BOARD OF PUBLIC UTILITIES | BURNS | 1,024 | 0.0072 mg/L |
| MOORCROFT, TOWN OF | MOORCROFT | 1,009 | 0.0080 mg/L |
| PIONEER MOBILE HOME PARK | GREEN RIVER | 1,000 | 0.0060 mg/L |
| WASHAKIE RURAL WATER SYSTEM | 990 | 0.0089 mg/L | |
| CLEARVIEW I&S DISTRICT | ROCK SPRINGS | 930 | 0.0071 mg/L |
| TETON VILLAGE WATER & SEWER DISTRICT | TETON VILLAGE | 906 | 0.0048 mg/L |
| MELODY RANCH IMPROVEMENT & SERVICE DIST. | JACKSON | 900 | 0.0044 mg/L |
| SOUTH BIG HORN COUNTY JPB | BASIN | 900 | 0.0043 mg/L |
| MARBLETON, TOWN OF | MARBLETON | 861 | 0.0034 mg/L |
| FOX PARK SUBDIVISION | GILLETTE | 843 | 0.0082 mg/L |
| HANNA, TOWN OF | HANNA | 841 | 0.0052 mg/L |
| DAYTON, TOWN OF | DAYTON | 824 | 0.0054 mg/L |
| COWLEY, TOWN OF | COWLEY | 800 | 0.0074 mg/L |
| HERITAGE VILLAGE SUBDIVISION | GILLETTE | 750 | 0.0058 mg/L |
| BEDFORD WATER & SEWER DISTRICT | BEDFORD | 750 | 0.0073 mg/L |
| FOOTHILLS MOBILE HOME PARK | GILLETTE | 735 | 0.0050 mg/L |
| GREATER SMOOT W&S DISTRICT | SMOOT | 720 | 0.0130 mg/L |
| EASTVIEW MANUFACTURED HOME COMMUNITY | GILLETTE | 688 | 0.0044 mg/L |
| VETERANS ADMINISTRATION MEDICAL CENTER | SHERIDAN | 685 | 0.0218 mg/L |
| WEST WINDS | CHEYENNE | 663 | 0.0137 mg/L |
| ARAPAHOE INDUSTRIAL PARK | 650 | 0.0004 mg/L | |
| BIG COUNTRY ESTATES | CHEYENNE | 615 | 0.0032 mg/L |
| SALT CREEK WATER DISTRICT | NEWCASTLE | 600 | 0.0030 mg/L |
| HIGH MEADOW RANCH | 580 | 0.0029 mg/L | |
| BYRON, TOWN OF | BYRON | 561 | 0.0021 mg/L |
| JAMESTOWN-RIO VISTA W&S DISTRICT | GREEN RIVER | 560 | 0.0020 mg/L |
| COKEVILLE, TOWN OF | COKEVILLE | 535 | 0.0038 mg/L |
| FARSON EDEN SCHOOL | FARSON | 530 | 0.0049 mg/L |
| SHOSHONI, TOWN OF | SHOSHONI | 515 | 0.0052 mg/L |
| WAMSUTTER, TOWN OF | WAMSUTTER | 500 | 0.0070 mg/L |
| CRESTVIEW ESTATES SUBDIVISION | GILLETTE | 500 | 0.0077 mg/L |
| PINE HAVEN, TOWN OF | PINE HAVEN | 498 | 0.0044 mg/L |
| SOUTH LARAMIE W&S DISTRICT | LARAMIE | 490 | 0.0080 mg/L |
| LINGLE, TOWN OF | LINGLE | 486 | 0.0030 mg/L |