Fresno, CA: 116 Health Violations — 73/100 (2026)
58 ZIP codes · 10 water systems · Updated 2026-06-03
Although water quality varies across any metro, Fresno's systems collectively post above-average compliance scores for CA — and documented violations are few.
How Fresno Compares
Data: EPA SDWIS Last verified: 2026-06-03
Water Quality Map: Fresno, CA
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Score Distribution
Distribution of water safety grades across Fresno.
Fresno Water: The Quick Version
- Your city's water systems recorded 290 violations in the past 5 years.
- Average lead level: 0.005 mg/L.
- Estimated remediation: $1,290 per household.
- CDC health risk index: 12.33 — above typical levels.
Water Systems Serving Fresno
At present, 3 utilities serve the bulk of Fresno, CA's residential water connections out of 10 systems active in the area, spread across independent providers with separate infrastructure and compliance obligations.
Overview
We track water quality and home safety data for 58 ZIP codes in Fresno, California, covering 10 community water systems serving approximately 620,656 people.
58 of 58 ZIP codes (100%) have recorded EPA violations. 116 health-based violations documented.
Home Safety Score
Average Home Safety Score for Fresno: B (73/100)
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
Fresno water systems draw from: Groundwater, Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0050 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)
- Zone 1 (High): 0 ZIP codes
- Zone 2 (Moderate): 58 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 2 DBP Rule | Treatment Technique | 236 | 58 |
| Contaminant 2414 | Other | 59 | 58 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 93650 | B | 5 | 2 | City of Fresno |
| 93701 | B | 5 | 2 | City of Fresno |
| 93702 | B | 5 | 2 | City of Fresno |
| 93703 | B | 5 | 2 | City of Fresno |
| 93704 | B | 5 | 2 | City of Fresno |
| 93705 | B | 5 | 2 | City of Fresno |
| 93706 | B | 5 | 2 | City of Fresno |
| 93707 | B | 5 | 2 | City of Fresno |
| 93708 | B | 5 | 2 | City of Fresno |
| 93709 | B | 5 | 2 | City of Fresno |
All ZIP Codes in Fresno
- 93650 [B] — 5 violations ⚠
- 93701 [B] — 5 violations ⚠
- 93702 [B] — 5 violations ⚠
- 93703 [B] — 5 violations ⚠
- 93704 [B] — 5 violations ⚠
- 93705 [B] — 5 violations ⚠
- 93706 [B] — 5 violations ⚠
- 93707 [B] — 5 violations ⚠
- 93708 [B] — 5 violations ⚠
- 93709 [B] — 5 violations ⚠
- 93710 [B] — 5 violations ⚠
- 93711 [B] — 5 violations ⚠
- 93712 [B] — 5 violations ⚠
- 93714 [B] — 5 violations ⚠
- 93715 [B] — 5 violations ⚠
- 93716 [B] — 5 violations ⚠
- 93717 [B] — 5 violations ⚠
- 93718 [B] — 5 violations ⚠
- 93720 [B] — 5 violations ⚠
- 93721 [B] — 5 violations ⚠
- 93722 [B] — 5 violations ⚠
- 93723 [B] — 5 violations ⚠
- 93724 [B] — 5 violations ⚠
- 93725 [B] — 5 violations ⚠
- 93726 [B] — 5 violations ⚠
- 93727 [B] — 5 violations ⚠
- 93728 [B] — 5 violations ⚠
- 93729 [B] — 5 violations ⚠
- 93730 [B] — 5 violations ⚠
- 93737 [B] — 5 violations ⚠
- 93740 [B] — 5 violations ⚠
- 93741 [B] — 5 violations ⚠
- 93744 [B] — 5 violations ⚠
- 93745 [B] — 5 violations ⚠
- 93747 [B] — 5 violations ⚠
- 93750 [B] — 5 violations ⚠
- 93755 [B] — 5 violations ⚠
- 93760 [B] — 5 violations ⚠
- 93761 [B] — 5 violations ⚠
- 93764 [B] — 5 violations ⚠
- 93765 [B] — 5 violations ⚠
- 93771 [B] — 5 violations ⚠
- 93772 [B] — 5 violations ⚠
- 93773 [B] — 5 violations ⚠
- 93774 [B] — 5 violations ⚠
- 93775 [B] — 5 violations ⚠
- 93776 [B] — 5 violations ⚠
- 93777 [B] — 5 violations ⚠
- 93778 [B] — 5 violations ⚠
- 93779 [B] — 5 violations ⚠
- 93786 [B] — 5 violations ⚠
- 93790 [B] — 5 violations ⚠
- 93791 [B] — 5 violations ⚠
- 93792 [B] — 5 violations ⚠
- 93793 [B] — 5 violations ⚠
- 93794 [B] — 5 violations ⚠
- 93844 [B] — 5 violations ⚠
- 93888 [B] — 5 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.
CDC Health Data for Fresno
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
Key Contaminants Detected in Fresno
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
Fresno: Remediation Cost in Perspective
At current valuations, Fresno sits in the low remediation-share tier — the equity impact of fixing documented issues is proportionally minor.
Remediation costs in Fresno are relatively low compared to home values. The $543–$2,238 estimated range is a small fraction of median property value. Home values are 59% below the California average.
Protecting Children from Lead in Fresno
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 Fresno 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.
Climate-Related Water Risk for Fresno
Flood risk in Fresno occupies the middle ground: 151 NFIP claims and 28% of local ZIP codes within FEMA flood zones. At that level, the risk pathways connecting flooding to water quality — treatment system stress, well infiltration, distribution backflow — become relevant considerations during significant flood events, even if day-to-day water quality is unaffected by flood history.
Fresno has a moderate flood history with 151 FEMA claims averaging $4,999 per payout. 28% 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>$1,290</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 Fresno, CA