Water Quality: Sunnyvale, CA
1 water system • 157,566 people served
Multiple Health ViolationsWater Quality Summary
Sunnyvale is served by 1 public water system with a combined service population of 157,566 people, and has 228 EPA Safe Drinking Water Act violations on record. Critically, 6 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Sunnyvale's violation count is 375% above the national average for California. Contaminants associated with violations include Fecal Coliform.
Contaminants Found
Indicates direct fecal contamination; associated with diarrhea, cramps, nausea, and potential severe illness.
Common source: Human and animal fecal waste
EPA limit: Zero tolerance (any positive triggers violations)
Water Systems Serving Sunnyvale
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| CITY OF SUNNYVALE | CA4310014 | Surface Water | 157,566 | 228 |
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.