Norwalk, CA: 2 Violations - Home Safety 56/100
4 ZIP codes · 5 water systems · Updated
ZipCheckup grade for Norwalk: C.
A mixed picture - some signals here are worth your attention.
Across Norwalk, EPA compliance data for CA sits at a moderate level - not alarming, but not uniformly clean across all service areas either.
How Norwalk Compares
Data: EPA SDWIS
Key Facts for Norwalk Residents
- Your city's water systems recorded 2 violations in the past 5 years.
- Average lead level: 0.0019 mg/L.
- Estimated remediation: $850 per household.
- CDC health risk index: 10.71.
Norwalk's Water Providers
Water service in Norwalk, CA is split across 3 utilities out of 5 tracked federally, each operating its own infrastructure and compliance record.
- C
- C
- C
Overview
We track home safety data for 4 ZIP codes in Norwalk, California (population ~100,808), covering 5 community water systems serving approximately 265,849 people region-wide. The EPA snapshots used for this build directly map water systems to 1 of 4 ZIP codes.
1 of 1 ZIP code with a reported violation count in the available EPA record (100%) have recorded EPA violations. The available record reports no health-based violations for this measured scope.
Home Safety Score
Average Home Safety Score for Norwalk: C (56/100)
Model 4.0.0 uses four measured components across three equally weighted domains. If a required domain is unavailable, no score is published:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| PFAS MCL Screen | UCMR 5 testing against the covered federal MCLs |
| Radon Risk | EPA radon zone classification |
| Annual AQI | EPA AirData county-year median with at least 90 observed days |
Water Sources
Norwalk water systems draw from: Groundwater, Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0019 mg/L (EPA action level: 0.015 mg/L)
- 0 of 1 ZIP code with known status exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 2 (Moderate Risk)
- Zone 1 (High): 0 ZIP codes
- Zone 2 (Moderate): 4 ZIP codes
- Zone 3 (Low): 0 ZIP codes
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Stage 1 DBP Rule | Treatment Technique | 4 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 90650 | C | 2 | 0 | Liberty Utilities - Bellflower-norwalk |
All ZIP Codes in Norwalk
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
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.
Norwalk 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 Norwalk's Water?
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
How Remediation Costs Compare in Norwalk
Within the Norwalk market, estimated remediation claims a small portion of typical property equity - the financial burden is proportionally low.
Remediation costs in Norwalk are relatively low compared to home values. The $300–$1,450 estimated range is a small fraction of median property value. Home values are 17% below the California average.
Norwalk: 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.
Lead risk in Norwalk 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.
Norwalk: NFIP Claim Records and Water-Quality Context
Historical NFIP data for Norwalk contains 6 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $3,989. Among ZIP codes with claim records, 0% have an A- or V-family dominant rated zone recorded in those historical claims. This is not a complete current FEMA property-map inventory.
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. The <strong>$850</strong> remediation estimate shown here excludes flood insurance and is not derived from NFIP claim count.
Claim count does not establish current property risk. Check the exact address in FEMA's current map and obtain a property-specific insurance quote when relevant.
Source: historical FEMA National Flood Insurance Program (NFIP) claim records. No current FEMA property-map designation is asserted.
What You Can Do in Norwalk
- 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. Filters rated for Stage 1 DBP Rule can reduce the most common contaminant found in Norwalk's water.
- 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 Norwalk, CA