Hanford, CA: 4 Health Violations — 95/100 (2026)
2 ZIP codes · 6 water systems · Updated 2026-06-03
Water systems serving Hanford hold a strong EPA compliance record — the city places among the better-performing areas in CA with few health-based violations on file.
How Hanford Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Hanford Water
- Your city's water systems recorded 12 violations in the past 5 years.
- Average lead level: 0.0047 mg/L.
- Estimated remediation: $1,300 per household.
- CDC health risk index: 11.97.
Who Supplies Your Water in Hanford
Residential water in Hanford, CA is supplied by 3 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 6 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 2 ZIP codes in Hanford, California, covering 6 community water systems serving approximately 69,130 people.
2 of 2 ZIP codes (100%) have recorded EPA violations. 4 health-based violations documented.
Home Safety Score
Average Home Safety Score for Hanford: A (95/100)
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
Hanford water systems draw from: Groundwater.
Lead & Copper
- Average lead level (90th percentile): 0.0047 mg/L (EPA action level: 0.015 mg/L)
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 3 (Low Risk)
- Zone 1 (High): 0 ZIP codes
- Zone 2 (Moderate): 0 ZIP codes
- Zone 3 (Low): 2 ZIP codes
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 6 | 2 |
| Stage 1 DBP Rule | Treatment Technique | 6 | 2 |
| Lead | Inorganic | 3 | 2 |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 3 | 2 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 93230 | A | 6 | 2 | City of Hanford, |
| 93232 | A | 6 | 2 | City of Hanford, |
All ZIP Codes in Hanford
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 Hanford
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
Top Contaminants in Hanford Water
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
Cost Context: What Remediation Means for Hanford Homeowners
Within the Hanford market, estimated remediation claims a small portion of typical property equity — the financial burden is proportionally low.
Remediation costs in Hanford are relatively low compared to home values. The $550–$2,300 estimated range is a small fraction of median property value. Home values are 56% below the California average.
Lead Exposure Risk for Children in Hanford
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 Hanford 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.
Flood & Climate Risk in Hanford
Although Hanford's flood history doesn't reach high-severity thresholds, NFIP data documents 4 claims and FEMA maps place 50% of ZIP codes in designated flood zones — a combined profile that makes flood-related water quality considerations a reasonable planning baseline.
Hanford has a moderate flood history with 4 FEMA claims averaging $1,951 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>$1,300</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.
Deep Dive Reports
Detailed analysis for Hanford, CA