Water Quality: Rancho Cordova, CA
12 water systems • 134,193 people served
Multiple Health ViolationsWater Quality Summary
Rancho Cordova is served by 12 public water systems with a combined service population of 134,193 people, and has 129 EPA Safe Drinking Water Act violations on record. Critically, 112 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Rancho Cordova's violation count is 169% above the national average for California. Contaminants associated with violations include Barium, Fecal Coliform, Gross Alpha, TTHM, Total Haloacetic Acids (HAA5).
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
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)
Alpha-emitting radioactive particles increase cancer risk, particularly from bone and other internal cancers.
Common source: Natural uranium and radium in geological formations
EPA limit: 15 pCi/L (excluding radon and uranium)
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 Rancho Cordova
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| GOLDEN STATE WATER CO. - CORDOVA | CA3410015 | Surface Water | 47,161 | 4 |
| GOLDEN STATE WATER COMPANY - SIMI VALLEY | CA5610059 | Surface Water | 45,128 | 0 |
| GOLDEN STATE WATER COMPANY - BAY POINT | CA0710002 | Surface Water | 23,731 | 0 |
| GOLDEN STATE WATER CO - ARDEN WATER SERV | CA3410003 | Groundwater | 5,658 | 0 |
| GOLDEN STATE WATER CO.-CLEARLAKE SYSTEM | CA1710002 | Surface Water | 4,644 | 0 |
| GOLDEN STATE WATER COMPANY - NIPOMO | CA4010018 | Groundwater | 4,506 | 0 |
| GOLDEN STATE WATER COMPANY-CYPRESS RIDGE | CA4010040 | Groundwater | 2,026 | 3 |
| GOLDEN STATE WATER COMPANY - LAKE MARIE | CA4210022 | Groundwater | 545 | 0 |
| HOMETOWN COLONIAL ESTATES LLC | CA3400217 | Groundwater | 400 | 0 |
| GOLDEN STATE WATER CO. - ROBBINS | CA5100107 | Groundwater | 205 | 81 |
| GOLDEN STATE WATER CO - SAN JUAN OAKS | CA3510008 | Groundwater | 159 | 0 |
| GOLDEN STATE WATER COMPANY - SOUTH SHORE | CA1700519 | Surface Water | 30 | 41 |
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.