Chualar, CA: 1 Health Violation — 64/100 (2026)
1 ZIP code · 2 water systems · Updated 2026-06-03
Across Chualar, EPA compliance data for CA sits at a moderate level — not alarming, but not uniformly clean across all service areas either.
How Chualar Compares
Data: EPA SDWIS Last verified: 2026-06-03
Key Facts for Chualar Residents
- Your city's water systems recorded 2 violations in the past 5 years.
- Average lead level: 0.011 mg/L.
- Homes built before 1986: 63% — older plumbing may contain lead solder.
- Estimated remediation: $1,900 per household.
- CDC health risk index: 11.65.
Chualar's Water Providers
Residential addresses in Chualar, CA are served by 2 primary water providers out of 2 systems in federal records. Each system maintains separate infrastructure and files its own EPA compliance reports, so service conditions are not uniform across the city.
Overview
We track water quality and home safety data for 1 ZIP code in Chualar, California (population ~1,320), covering 2 community water systems serving approximately 8,372 people region-wide.
1 of 1 ZIP code (100%) have recorded EPA violations. 1 health-based violation documented.
Home Safety Score
Average Home Safety Score for Chualar: C (64/100)
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
Chualar water systems draw from: Groundwater.
Lead & Copper
- Average lead level (90th percentile): 0.0110 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)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Stage 2 DBP Rule | Treatment Technique | 4 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 93925 | C | 2 | 1 | City of Gonzales, |
All ZIP Codes in Chualar
- 93925 [C] — 2 violations ⚠
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.
Chualar 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
What's in Chualar's Water?
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
Chualar Infrastructure Age
With 63% of homes built before 1986, lead solder in plumbing is a potential concern. The EPA banned lead solder in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Viewed through the lens of construction era, Chualar is predominantly an older city — a median build year of 1972 puts most of the residential inventory in the range where pre-1986 plumbing materials were the standard.
Over half of homes in Chualar were built before 1986, when lead solder was banned. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.
Source: U.S. Census Bureau ACS B25034.
How Remediation Costs Compare in Chualar
How much of a Chualar home's value does documented remediation represent? A small fraction — the equity share here is in the low tier, and from a household financial perspective, most property owners are considering a commitment that fits comfortably within standard planning rather than a decision that rises to the level of a material budget event or significant equity consideration.
Remediation costs in Chualar are relatively low compared to home values. The $950–$3,200 estimated range is a small fraction of median property value. Home values are 11% below the California average.
Chualar: Lead Risk & Vulnerable Populations
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.
Pulling a tap sample fills the gap that utility data cannot close, particularly here where 63% of housing dates from the pre-rule era and citywide monitoring sits at or above the regulatory mark in Chualar.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Chualar: Flood History & Water Damage Risk
FEMA data shows 100% of Chualar's ZIP codes mapped into designated flood zones, paired with an NFIP record of 6 claims. That footprint places local flood exposure in the range where it warrants attention without rising to high-severity planning territory.
Chualar has a moderate flood history with 6 FEMA claims averaging $15,210 per payout. 100% 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>$1,900</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 Chualar
- Test your water at home. City-level data shows averages — your tap may differ. Lead testing is especially recommended given the area's lead levels.
- Install a certified water filter. Filters rated for Stage 2 DBP Rule can reduce the most common contaminant found in Chualar's water.
- Check your home's plumbing. With 63% of homes built before 1986, lead solder is a real possibility.
Deep Dive Reports
Detailed analysis for Chualar, CA