Chatsworth, CA Water Safety: 54/100 (2026)
2 ZIP codes · 5 water systems · Updated 2026-06-03
Across water systems in Chatsworth, EPA data shows a below-average compliance pattern for CA — health-based violations are on file in several areas, and checking the specific system serving your address is a practical first step for concerned residents.
How Chatsworth Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Chatsworth Water
- Estimated remediation: $1,000 per household.
- CDC health risk index: 10.71.
Who Supplies Your Water in Chatsworth
Throughout Chatsworth, CA, water comes from one of 3 primary utilities out of 5 total systems — independent providers with different rate structures, infrastructure, and compliance records that vary across the service territory.
Overview
We track water quality and home safety data for 2 ZIP codes in Chatsworth, California (population ~40,557), covering 5 community water systems serving approximately 4,044,852 people region-wide.
No EPA violations recorded across any ZIP codes in Chatsworth — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Chatsworth: D (54/100)
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
Chatsworth water systems draw from: Surface water.
Lead & Copper
- Lead data: not yet available for Chatsworth
- 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 |
|---|---|---|---|
| 91311 | C | VENTURA WWD NO. 8 - SIMI VALLEY | 94,738 |
| 91313 | D | VENTURA WWD NO. 8 - SIMI VALLEY | 94,738 |
All ZIP Codes in Chatsworth
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 Chatsworth
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 Chatsworth Homeowners
Given current Chatsworth valuations, the remediation-to-property-value ratio is low — most homeowners are looking at a proportionally modest share that fits within routine financial planning.
Remediation costs in Chatsworth are relatively low compared to home values. The $400–$1,700 estimated range is a small fraction of median property value. Home values are 13% above the California average.
Flood & Climate Risk in Chatsworth
Across the NFIP's long tracking period, Chatsworth shows 25 claims and 50% of ZIP codes within FEMA-designated flood zones — figures that place it in moderate flood exposure territory. At this level, the water-quality implications of flooding — contaminated wells, stressed treatment intake, distribution backflow — move from theoretical edge cases to genuine periodic risks, particularly during higher-severity events.
Chatsworth has a moderate flood history with 25 FEMA claims averaging $4,711 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.
What You Can Do in Chatsworth
- Test your water at home. City-level data shows averages — your tap may differ. NSF-certified test kits cost $20-40 and give results in days.
- Install a certified water filter. An NSF-certified pitcher or under-sink filter removes most common contaminants.
- Check your home's plumbing. Homes built before 1986 may have lead solder in pipes. A licensed plumber can assess your risk.
- Review your water system's CCR. Your utility publishes an annual Consumer Confidence Report with detailed test results. Request it or find it online.
Deep Dive Reports
Detailed analysis for Chatsworth, CA