Water Quality: Angwin, CA
5 water systems • 3,390 people served
Multiple Health ViolationsWater Quality Summary
Angwin is served by 5 public water systems with a combined service population of 3,390 people, and has 95 EPA Safe Drinking Water Act violations on record. Critically, 66 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Angwin's violation count is 98% above the national average for California. Contaminants associated with violations include Stage 2 DBP, TTHM, Total Haloacetic Acids (HAA5).
Contaminants Found
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
Total trihalomethanes are linked to increased risk of bladder cancer and adverse reproductive outcomes.
Common source: Reaction of chlorine disinfectants with naturally occurring organic matter in water
EPA limit: 0.080 mg/L (80 ppb)
Haloacetic acids are associated with increased cancer risk and potential reproductive and developmental effects.
Common source: Reaction of chlorine disinfectants with organic matter in treated water
EPA limit: 0.060 mg/L (60 ppb)
Water Systems Serving Angwin
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| PACIFIC UNION COLLEGE | CA2810012 | Groundwater | 1,958 | 6 |
| HOWELL MOUNTAIN MUTUAL WATER COMPANY | CA2810001 | Surface Water | 1,240 | 78 |
| LINDA VISTA MUTUAL WATER CO | CA2800528 | Groundwater | 90 | 0 |
| LA TIERRA HEIGHTS MUTUAL | CA2800525 | Groundwater | 67 | 10 |
| LINDA FALLS TERRACE MUTUAL | CA2800527 | Groundwater | 35 | 1 |
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 California
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.