Northridge, CA Water Safety: 55/100 (2026)
6 ZIP codes · 2 water systems · Updated 2026-06-03
Compared to top-scoring cities in CA, Northridge lands in the middle tier — some water systems meet standards cleanly, others carry documented violations, and performance can vary significantly across service areas.
How Northridge Compares
Data: EPA SDWIS Last verified: 2026-06-03
Water Quality Map: Northridge, CA
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Score Distribution
Safety grade breakdown for Northridge's 6 ZIP codes.
Key Facts for Northridge Residents
- Estimated remediation: $800 per household.
- CDC health risk index: 10.71.
Northridge's Water Providers
Residential water in Northridge, CA is supplied by 2 separate utilities — not one centralized authority. Each of those providers operates under its own service territory boundary, maintains its own distribution infrastructure, and files compliance documentation with the EPA on its own timeline. Federal data counts 2 water systems in the area, with these providers collectively accounting for the dominant share of household connections.
Overview
We track water quality and home safety data for 6 ZIP codes in Northridge, California (population ~67,217), covering 2 community water systems serving approximately 3,875,648 people region-wide.
No EPA violations recorded across any ZIP codes in Northridge — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Northridge: C (55/100)
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
Northridge water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Northridge
- 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): 6 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 |
|---|---|---|---|
| 91324 | C | Los Angeles-city, Department of Water & Power | 3,875,566 |
| 91325 | C | Los Angeles-city, Department of Water & Power | 3,875,566 |
| 91327 | D | DESERT BREEZE MOBILE HOME ESTATES | 82 |
| 91328 | D | DESERT BREEZE MOBILE HOME ESTATES | 82 |
| 91329 | D | DESERT BREEZE MOBILE HOME ESTATES | 82 |
| 91330 | D | Los Angeles-city, Department of Water & Power | 3,875,566 |
All ZIP Codes in Northridge
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.
Northridge Community Health Snapshot
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
How Remediation Costs Compare in Northridge
Low proportionality — that's the Northridge picture when remediation costs are placed against typical home equity.
Remediation costs in Northridge are relatively low compared to home values. The $267–$1,400 estimated range is a small fraction of median property value. Home values are 22% above the California average.
Northridge: Flood History & Water Damage Risk
Northridge's flood exposure sits in the moderate range: 25 NFIP claims on record and 33% of ZIP codes within FEMA-designated flood zones. Residents with private wells or older infrastructure have reasonable grounds to factor flood timing into their water quality awareness.
Northridge has a moderate flood history with 25 FEMA claims averaging $1,750 per payout. 33% 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>$800</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 Northridge
- 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.
Deep Dive Reports
Detailed analysis for Northridge, CA