Nevada Water Quality
According to EPA Safe Drinking Water Information System (SDWIS), Nevada has 230 active community water systems in this extract. PlainEnviro's health-based slice lists 1,021 violation records across 50 systems with at least one such row. These are historical EPA registry counts, not a statewide drinkability score.
Health-based violation records for 230 community water systems in Nevada. Source: EPA Safe Drinking Water Information System (SDWIS).
Water Systems with Most Health-Based Records
| # | Water System | Health-Based Records | Health |
|---|---|---|---|
| 1 | ROSEMOUNT WATER CO Reno | 212 | Yes |
| 2 | SHOSHONE ESTATES WATER CO INC Las Vegas | 111 | Yes |
| 3 | KATHERINE LANDING DWTP Boulder City | 63 | Yes |
| 4 | SILVER KNOLLS MUTUAL WATER COMPANY Reno | 57 | Yes |
| 5 | ROARK ESTATES WATER ASSOC Las Vegas | 49 | Yes |
| 6 | OLD RIVER WATER COMPANY Fallon | 43 | Yes |
| 7 | DESERT SUNRISE WATER USERS ASSOC Las Vegas | 36 | Yes |
| 8 | Duckwater Duckwater | 28 | Yes |
| 9 | Ft. McDermitt Paiute-Shoshone - Upper Mcdermitt | 20 | Yes |
| 10 | Yerington (Campbell Ranch) Yerington | 20 | Yes |
| 11 | MCDERMITT WATER SYSTEM Winnemucca | 20 | Yes |
| 12 | Las Vegas Paiute Colony Las Vegas | 17 | Yes |
| 13 | STAR POINT MHP RV PARK Mill City | 16 | Yes |
| 14 | South Fork (Te-Moak) Elko | 15 | Yes |
| 15 | SUTCLIFFE MOBILE PARK Reno | 14 | Yes |
| 16 | ELKHORN WATER ASSOCIATION LLC Las Vegas | 13 | Yes |
| 17 | Walker River Paiute Tribe Schurz | 12 | Yes |
| 18 | ELK POINT COUNTRY CLUB Zephyr Cove | 12 | Yes |
| 19 | PRIMM VALLEY CASINO RESORTS Las Vegas | 12 | Yes |
| 20 | BERMUDA PALMS MANAGEMENT LLC Las Vegas | 11 | Yes |
| 21 | Ft. McDermitt Paiute-Shoshone - Lower Mcdermitt | 10 | Yes |
| 22 | EQUESTRIAN ESTATES CO OP WATER ASSOC Las Vegas | 10 | Yes |
| 23 | NEVADA STATE VETERANS HOME BOULDER CITY Boulder | 10 | Yes |
| 24 | SIERRA COUNTRY ESTATES Minden | 10 | Yes |
| 25 | OSPREY MOBILE HOME PARK Las Vegas | 10 | Yes |
| 26 | SHETLAND WATER DISTRICT Las Vegas | 9 | Yes |
| 27 | Las Vegas Paiute Snow Mountain Las Vegas | 8 | Yes |
| 28 | GOLDFIELD TOWN WATER Goldfield | 8 | Yes |
| 29 | BLUE DIAMOND WATER CO OP INC Las Vegas | 8 | Yes |
| 30 | STAGECOACH GID Stagecoach | 6 | Yes |
| 31 | HAWTHORNE ARMY DEPOT Hawthorne | 6 | Yes |
| 32 | PINE VILLAGE MHP Henderson | 5 | Yes |
| 33 | BEATTY WATER AND SANITATION DISTRICT Beatty | 5 | Yes |
| 34 | LUNA VISTA Las Vegas | 5 | Yes |
| 35 | Yomba Indian Reservation Austin | 4 | Yes |
| 36 | Duck Valley Newtown Owyhee | 4 | Yes |
| 37 | LANDER CO SEWER AND WATER DIST 2 AUSTIN Battle Mountain | 4 | Yes |
| 38 | TOPAZ LAKE WATER CO INC Gardnerville | 4 | Yes |
| 39 | CARVERS SMOKEY VALLEY RV AND MHP Round Mountain | 4 | Yes |
| 40 | MOUNT ROSE BOWL PROPERTY OWNERS WATER CO Reno | 4 | Yes |
| 41 | NELLIS AIR FORCE BASE Nellis Afb | 4 | Yes |
| 42 | Battle Mountain Battle Mountain | 3 | Yes |
| 43 | PLANTATION ACRES MHP Las Vegas | 3 | Yes |
| 44 | ALAMO SEWER AND WATER GID Alamo | 3 | Yes |
| 45 | TERRACE GARDEN APARTMENTS Carson City | 3 | Yes |
| 46 | YERINGTON CITY OF Yerington | 3 | Yes |
| 47 | VALMY STATION MOBILE HOME PARK Valmy | 3 | Yes |
| 48 | SOUTHERN DESERT CORRECTIONAL CTR NDOC Las Vegas | 3 | Yes |
| 49 | MCCARTNEY MOBILE ESTATES MHP 2 Las Vegas | 3 | Yes |
| 50 | MCCARTNEY MOBILE ESTATES MHP 1 Las Vegas | 3 | Yes |
Most Common Contaminants in Nevada
| Contaminant | Violations | Systems Affected |
|---|---|---|
| Arsenic | 360 | 20 |
| Combined Uranium | 227 | 4 |
| Groundwater Rule | 201 | 44 |
| Total Haloacetic Acids (HAA5) | 48 | 1 |
| TTHM | 42 | 5 |
| Revised Total Coliform Rule | 36 | 15 |
| LEAD AND COPPER RULE REVISIONS | 28 | 24 |
| Lead and Copper Rule | 21 | 6 |
| Nitrate | 19 | 4 |
| Coliform (TCR) | 7 | 3 |
| Chlorite | 7 | 1 |
| Surface Water Treatment Rule | 6 | 5 |
| CYANIDE | 5 | 1 |
| Tetrachloroethylene | 4 | 1 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | 4 | 3 |
Cities with Water Quality Issues
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About This Data
Water quality data is from the EPA Safe Drinking Water Information System (SDWIS). Health-based violations include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations. Only community water systems (CWS) in Nevada are included.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.