Idaho Water Quality
Health violation data for 767 community water systems in Idaho. Based on EPA Safe Drinking Water Information System (SDWIS) data.
Water Systems
767
Total Violations
2,204
Systems with Violations
50
Cities with Issues
135
Water Systems with Most Violations
| # | Water System | Violations | Health |
|---|---|---|---|
| 1 | MISSION CREEK WATER ASSN Bonners Ferry | 195 | Yes |
| 2 | ELK CITY WATER AND SEWER ASSN Elk City | 114 | Yes |
| 3 | JULIAETTA CITY OF Juliaetta | 81 | Yes |
| 4 | MEADOW LARK COURT LLC Ammon | 80 | Yes |
| 5 | CLEARWATER WATER DIST Clearwater | 69 | Yes |
| 6 | DRAKE SUBD Caldwell | 62 | Yes |
| 7 | CEDAR SPRINGS COMMUNITY WATER Sagle | 54 | Yes |
| 8 | BIA NORTH IDAHO Lapwai | 49 | Yes |
| 9 | ASPEN RIDGE SUBD Rexburg | 34 | Yes |
| 10 | MCCALL CITY OF Mccall | 33 | Yes |
| 11 | FRUITLAND CITY OF Fruitland | 30 | Yes |
| 12 | KING HILL DOMESTIC WATER AND SEWER King Hill | 30 | Yes |
| 13 | RED ROCK WATER LLC Lewiston | 29 | Yes |
| 14 | FERNAN ESTATES CORPORATION Coeur D Alene | 26 | Yes |
| 15 | INDIAN VILLAGE Nampa | 26 | Yes |
| 16 | CASTLE MOUNTAIN CREEKS OWNERS ASSN Garden Valley | 26 | Yes |
| 17 | NEW HOPE SUBD Lenore | 24 | Yes |
| 18 | FILER WATER WORKS Filer | 23 | Yes |
| 19 | SHOTGUN CHEROKEE SUBD 5 Rexburg | 23 | Yes |
| 20 | BELLEVUE CITY OF Bellevue | 22 | Yes |
| 21 | OAKLEY VALLEY WATER CORPORATION Oakley | 22 | Yes |
| 22 | ASHTON CITY OF Ashton | 22 | Yes |
| 23 | RAMSEY ESTATES Coeur D'alene | 21 | Yes |
| 24 | IDAHO YOUTH RANCH HANDS OF PROMISE Caldwell | 21 | Yes |
| 25 | COUNTRY COURT COMMUNITY Grangeville | 20 | Yes |
| 26 | RIVERBEND ESTATES American Falls | 20 | Yes |
| 27 | GARDEN VALLEY RANCHETTES HOMEOWNERS Garden Valley | 18 | Yes |
| 28 | WAYSIDE ESTATES Heyburn | 18 | Yes |
| 29 | SHOTGUN NORTH Rexburg | 18 | Yes |
| 30 | HAMMETT HAVEN APARTMENTS Mountain Home | 16 | Yes |
| 31 | MOUNTAIN HOME AIR FORCE BASE Mountain Home Afb | 16 | Yes |
| 32 | SALMON CITY OF Salmon | 16 | Yes |
| 33 | EATON MOBILE HOME COURT Lewiston | 14 | Yes |
| 34 | IDAHO CITY WATER DEPT Idaho City | 14 | Yes |
| 35 | LITTLE BLACKTAIL RANCH WATER DISTRICT Athol | 13 | Yes |
| 36 | BANIDA WINDER WATER AND SEWER DIST Preston | 13 | Yes |
| 37 | BEE LINE WATER ASSN INC Bonners Ferry | 12 | Yes |
| 38 | TWENTY MILE CREEK WATER ASSN Bonners Ferry | 12 | Yes |
| 39 | FRANKLIN DOMESTIC WATER USERS Boise | 12 | Yes |
| 40 | GREENHILLS ESTATES 3 Meridian | 12 | Yes |
| 41 | MEANDER POINT SUBD Twin Falls | 12 | Yes |
| 42 | REUBENS CITY OF Reubens | 11 | Yes |
| 43 | GOOSE CREEK RENTALS Indian Valley | 11 | Yes |
| 44 | ISLAND VILLAGE MOBILE HOME PARK Boise | 11 | Yes |
| 45 | SUNBEAM WATER Rockland | 11 | Yes |
| 46 | CASSANDRA HILLS OWNERS ASSN St Maries | 10 | Yes |
| 47 | SUNNYRIDGE I SUBD Nampa | 10 | Yes |
| 48 | WOODLAND SHORES WATER AND SEWER ASSN Coeur D Alene | 9 | Yes |
| 49 | TERRACE LAKES WATER COMPANY New Plymouth | 9 | Yes |
| 50 | GREENHORN SUBD Ketchum | 9 | Yes |
Most Common Contaminants in Idaho
| Contaminant | Violations | Systems Affected |
|---|---|---|
| Fluoride | 610 | 136 |
| E. coli | 269 | 92 |
| Lead (Action Level) | 221 | 9 |
| Nitrate | 210 | 13 |
| Chloroform | 193 | 3 |
| Barium | 174 | 17 |
| Haloacetic Acids (HAA5) | 110 | 11 |
| Turbidity | 90 | 9 |
| Arsenic | 72 | 21 |
| Gross Alpha | 68 | 61 |
| Total Coliform (RTCR) | 52 | 32 |
| Copper | 36 | 5 |
| Combined Radium 226/228 | 35 | 20 |
| Total Trihalomethanes (TTHM) | 23 | 4 |
| Manganese | 15 | 2 |
Cities with Water Quality Issues
Pocatello American Falls Blackfoot Soda Springs Twin Falls Burley Jerome Heyburn Rupert Idaho Falls Rexburg Salmon Lewiston Grangeville Kamiah Caldwell Eagle Fruitland Grand View Marsing Kuna Meridian Mountain Home Afb Nampa Payette Wilder Boise Athol Kellogg Moyie Springs Post Falls Plummer Priest River Princeton Rathdrum Dover Wallace Coeur D Alene Donnelly Moscow +95 more
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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 Idaho are included.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.