Water Quality: Pleasanton, CA
4 water systems • 176,289 people served
Some ConcernsWater Quality Summary
Pleasanton is served by 4 public water systems with a combined service population of 176,289 people, and has 9 EPA Safe Drinking Water Act violations on record. Critically, 1 of those are health-based violation, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Pleasanton's violation count is 81% below the national average for California. Contaminants associated with violations include Stage 2 DBP.
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
Water Systems Serving Pleasanton
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| DUBLIN SAN RAMON SERVICES DISTRICT | CA0110009 | Surface Water | 98,776 | 0 |
| CITY OF PLEASANTON | CA0110008 | Surface Water | 76,689 | 0 |
| CASTLEWOOD DOMESTIC WATER SYSTEM | CA0105008 | Groundwater | 524 | 2 |
| SAHARA MOBILE COURT | CA3900964 | Groundwater | 300 | 7 |
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.