San Fernando, CA Water Safety: 83/100 (2026)
2 ZIP codes · 2 water systems · Updated 2026-06-03
Although water quality varies across any metro, San Fernando's systems collectively post above-average compliance scores for CA — and documented violations are few.
How San Fernando Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About San Fernando Water
- Average lead level: 0.0015 mg/L.
- Estimated remediation: $1,000 per household.
- CDC health risk index: 10.71.
Who Supplies Your Water in San Fernando
Across San Fernando, CA, residential water comes from 2 primary utilities rather than a single consolidated provider. Each system operates independently — managing its own distribution infrastructure, rate schedules, and EPA compliance filings. Federal records track 2 water systems in the area, with these top providers accounting for the majority of residential connections.
Overview
We track water quality and home safety data for 2 ZIP codes in San Fernando, California (population ~33,750), covering 2 community water systems serving approximately 3,899,512 people region-wide.
No EPA violations recorded across any ZIP codes in San Fernando — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for San Fernando: B (83/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
San Fernando water systems draw from: Groundwater.
Lead & Copper
- Average lead level (90th percentile): 0.0015 mg/L (EPA action level: 0.015 mg/L)
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 2 (Moderate Risk)
- Zone 1 (High): 0 ZIP codes
- Zone 2 (Moderate): 2 ZIP codes
- Zone 3 (Low): 0 ZIP codes
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 91340 | B | San Fernando-city, Water Department | 23,946 |
| 91341 | B | San Fernando-city, Water Department | 23,946 |
All ZIP Codes in San Fernando
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.
Health Outcomes in San Fernando
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
Cost Context: What Remediation Means for San Fernando Homeowners
Equity impact data for San Fernando lands in the favorable tier — remediation claims a small slice of what properties here are worth.
Remediation costs in San Fernando are relatively low compared to home values. The $400–$1,700 estimated range is a small fraction of median property value. Home values are 15% below the California average.
Lead Exposure Risk for Children in San Fernando
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
Lead risk in San Fernando appears low overall, but individual homes may differ. Testing is the only way to confirm your water's lead content.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Flood & Climate Risk in San Fernando
6 FEMA flood insurance claims are on file for San Fernando, and 50% of local ZIP codes fall within federally designated flood zones — enough to put flood exposure on the planning radar, though short of the concentrated-risk threshold where treatment-system vulnerability becomes a primary consideration.
San Fernando has a moderate flood history with 6 FEMA claims averaging $2,554 per payout. 50% of ZIP codes fall within FEMA flood zones. Flood events can contaminate drinking water and overwhelm treatment systems.
How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. Flood damage can add significantly to the estimated <strong>$1,000</strong> remediation cost per household.
Residents in flood-prone areas should consider flood insurance even outside FEMA zones — over 25% of flood claims come from low-to-moderate risk areas. After any flood event, test your water before drinking.
Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.
Deep Dive Reports
Detailed analysis for San Fernando, CA