Water Quality: Gilroy, CA
11 water systems • 60,126 people served
Multiple Health ViolationsWater Quality Summary
Gilroy is served by 11 public water systems with a combined service population of 60,126 people, and has 21 EPA Safe Drinking Water Act violations on record. Critically, 7 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Gilroy's violation count is 56% below the national average for California. Contaminants associated with violations include Selenium, Stage 2 DBP.
Contaminants Found
Hair loss, nail brittleness, and nervous system damage at elevated concentrations.
Common source: Natural geological deposits, mining discharges, oil refinery waste
EPA limit: 0.05 mg/L (50 ppb)
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 Gilroy
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| CITY OF GILROY | CA4310004 | Groundwater | 59,203 | 3 |
| NEW AVENUE MUTUAL WATER COMPANY | CA4300771 | Groundwater | 305 | 0 |
| HAPPY ACRES MWC | CA4300551 | Groundwater | 220 | 2 |
| GOLDEN HEIGHTS MUTUAL WATER COMPANY | CA4300992 | Groundwater | 66 | 0 |
| BURCHELL ROAD WATER ASSOCIATION | CA4300567 | Groundwater | 65 | 4 |
| LOS RANCHOS DE UVAS WATER COMPANY | CA4300637 | Groundwater | 58 | 4 |
| QUAIL CREEK ESTATES MUTUAL WATER COMPANY | CA4300979 | Groundwater | 55 | 0 |
| VALLEY VIEW RANCHES | CA4300996 | Groundwater | 45 | 5 |
| EMERALD VALLEY MUTUAL WATER COMPANY | CA4301004 | Groundwater | 43 | 3 |
| ANGELO LANE WATER COMPANY | CA4300578 | Groundwater | 41 | 0 |
| RUCKER AVENUE MUTUAL WATER CO | CA4301410 | Groundwater | 25 | 0 |
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.