Water Quality: Mountain Home, ID
13 water systems • 16,107 people served
Multiple Health ViolationsWater Quality Summary
Mountain Home is served by 13 public water systems with a combined service population of 16,107 people, and has 713 EPA Safe Drinking Water Act violations on record. Critically, 28 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Mountain Home's violation count is 436% above the national average for Idaho. Contaminants associated with violations include Barium, Chlorine Dioxide, E. coli, Stage 2 DBP.
Contaminants Found
Increases blood pressure and causes cardiovascular effects with long-term exposure.
Common source: Natural rock deposits, oil drilling operations, coal power plant waste
EPA limit: 2 mg/L
Can cause anemia in infants and young children; may cause nervous system effects at high levels.
Common source: Water treatment disinfectant used to control taste, odor, and microorganisms
EPA limit: 0.8 mg/L
Causes gastrointestinal illness; certain strains (e.g., O157:H7) can cause severe kidney failure and death.
Common source: Fecal contamination from humans or animals entering the water supply
EPA limit: Zero (no E. coli permitted in drinking water)
Trihalomethanes and haloacetic acids that increase cancer risk and may cause adverse reproductive outcomes.
Common source: Chlorine disinfection reacting with natural organic matter in source water
EPA limit: TTHM: 0.080 mg/L; HAA5: 0.060 mg/L
Water Systems Serving Mountain Home
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| MOUNTAIN HOME, CITY OF | ID4200032 | Groundwater | 14,651 | 150 |
| TRINITY ESTATES WATER USERS ASSN | ID4200053 | Groundwater | 250 | 12 |
| MELLEN SUBD WATER DIST | ID4200089 | Groundwater | 250 | 179 |
| SUMMERWIND WATER USERS | ID4200049 | Groundwater | 192 | 1 |
| SAWTOOTH ESTATES WATER USERS | ID4200043 | Groundwater | 175 | 8 |
| BLUE SAGE SUBDIVISION | ID4200108 | Groundwater | 112 | 240 |
| SPLENDID ACRES WATER ASSN | ID4200048 | Groundwater | 91 | 33 |
| TOWN AND COUNTRY WATER USERS ASSN | ID4200052 | Groundwater | 86 | 11 |
| NEW HORIZONS WATER INC | ID4200033 | Groundwater | 85 | 7 |
| OAKLEAF SUBDIVISION | ID4200096 | Groundwater | 71 | 1 |
| HAMMETT HAVEN APARTMENTS | ID4200023 | Groundwater | 64 | 25 |
| CAMAS ESTATES WATER USERS | ID4200009 | Groundwater | 50 | 28 |
| SILVER SAGE REAL PROPERTY OWNERS ASSN | ID4200045 | Groundwater | 30 | 18 |
Concerned About Your Water?
A home water filter can remove common contaminants. NSF-certified filters are tested against EPA standards.
Consider a reverse osmosis system for comprehensive filtration or a carbon filter for basic improvement.
Other Cities in Idaho
Data Sources
Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). Data includes all recorded violations for active community water systems.