California Domestic Water Company
EPA ID: CA1910199 · 0 people served · 11 ZIP codes
California Domestic Water Company carries zero EPA violations in five years — a spotless record for a utility serving 0 residents.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for California Domestic Water Company Source: EPA SDWIS service area boundaries.
Service area boundary — Grade B
Service Area Demographics
The California Domestic Water Company serves a community with a median household income of $100,965 and an estimated 187,139 residents across its service area. Approximately 92% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 49% of the population in this service area is classified as disadvantaged under EPA's EJScreen criteria. Communities with higher disadvantaged populations often face disproportionate environmental and health burdens, including aging water infrastructure and limited resources for remediation.
💧 Where Does Your Water Come From?
California Domestic Water Company's water is pumped from underground aquifers. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
About 2% of homes in Los Angeles County, California rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Superfund Proximity Note: This service area ranks in the 70th percentile nationally for proximity to Superfund (NPL) sites. Groundwater sources near contaminated sites may face elevated risk from industrial chemicals.
Infrastructure Risk
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 34 detections recorded. 10 exceed federal EPA limits (4 ppt for PFOA/PFOS). 10 exceed state limits.
Comparable Water Systems
Similar-sized systems in California
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
California Domestic Water Company (EPA ID: CA1910199) is a community water system in California that serves approximately 0 people from groundwater sources.
This system provides water to 11 ZIP codes across 1 community.
Average Home Safety Score: B (83/100)
Based on water quality violations, lead levels, and radon risk across all ZIP codes served by this system.
Violation History
Lead & Copper
EPA Lead and Copper Rule sampling data for ZIP codes served by this system:
| ZIP Code | Lead Level | Exceeds Limit | Sample Date |
|---|---|---|---|
| 90603 | 0.0015 mg/L | No | N/A |
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 2 (Moderate Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
ZIP Codes Served
Coverage: 1 ZIP code confirmed via EPA Community Water System Service Area Boundaries v3 plus 10 additional ZIPs inferred from SDWIS registry data. The EPA-confirmed set is the most reliable; SDWIS-inferred entries may be narrower than the real deployment area.
- 90601 — Whittier
- 90602 — Whittier
- 90603 — Whittier
- 90604 — Whittier
- 90605 — Whittier
- 90606 — Whittier
- 90607 — Whittier
- 90608 — Whittier
- 90609 — Whittier
- 90610 — Whittier
- 90612 — Whittier
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for California Domestic Water Company (CA1910199) on EPA.gov.
Frequently Asked Questions
Is California Domestic Water Company water safe to drink?
Based on EPA records, California Domestic Water Company has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does California Domestic Water Company serve?
California Domestic Water Company serves approximately 0 people across 11 ZIP codes in California.
Where does California Domestic Water Company get its water?
The primary water source is groundwater.