Sylmar, CA Water Safety: 54/100 (2026)
2 ZIP codes · 2 water systems · Updated 2026-06-03
Water monitoring data from Sylmar, CA tells a below-average story — health violations are present and system-level detail is worth reviewing before drawing conclusions.
How Sylmar Compares
Data: EPA SDWIS Last verified: 2026-06-03
Key Facts for Sylmar Residents
- Estimated remediation: $1,000 per household.
- CDC health risk index: 10.71.
Sylmar's Water Providers
2 water systems are tracked federally in Sylmar, CA. The top 2 providers collectively serve most residential addresses, but because they operate independently, infrastructure maintenance standards and compliance histories differ from one service zone to another.
Overview
We track water quality and home safety data for 2 ZIP codes in Sylmar, California (population ~93,513), covering 2 community water systems serving approximately 3,899,512 people region-wide.
No EPA violations recorded across any ZIP codes in Sylmar — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Sylmar: 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
Sylmar water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Sylmar
- 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 |
|---|---|---|---|
| 91342 | C | SAN FERNANDO-CITY, WATER DEPT. | 23,946 |
| 91392 | D | SAN FERNANDO-CITY, WATER DEPT. | 23,946 |
All ZIP Codes in Sylmar
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.
Sylmar 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 Sylmar
Low proportionality — that's the Sylmar picture when remediation costs are placed against typical home equity.
Remediation costs in Sylmar 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% below the California average.
Sylmar: Flood History & Water Damage Risk
Flood exposure in Sylmar is meaningful by NFIP measures — 36 claims on record and 50% of ZIP codes carrying FEMA flood zone designations. That level of activity makes flood history a relevant factor when evaluating local water quality over time.
Sylmar has a moderate flood history with 36 FEMA claims averaging $3,313 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 Sylmar
- 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 Sylmar, CA