Clovis, CA: 8 Health Violations — 71/100 (2026)
4 ZIP codes · 7 water systems · Updated 2026-06-03
Drinking water tracked for Clovis by CA authorities posts above-average scores — the majority of systems are free from health-based exceedances and the city's grade sits above the state median.
How Clovis Compares
Data: EPA SDWIS Last verified: 2026-06-03
Clovis Water: The Quick Version
- Your city's water systems recorded 24 violations in the past 5 years.
- Average lead level: 0.0028 mg/L.
- Homes built before 1986: 40% — older plumbing may contain lead solder.
- Estimated remediation: $2,050 per household.
- CDC health risk index: 12.33 — above typical levels.
Water Systems Serving Clovis
Federal drinking water records identify 7 systems in Clovis, CA. The leading 3 providers serve the largest share of residential connections, each operating as a separate entity with its own rate authority, infrastructure management, and EPA compliance obligations — so service conditions are not uniform city-wide.
Overview
We track water quality and home safety data for 4 ZIP codes in Clovis, California (population ~137,802), covering 7 community water systems serving approximately 678,025 people region-wide.
4 of 4 ZIP codes (100%) have recorded EPA violations. 8 health-based violations documented.
Home Safety Score
Average Home Safety Score for Clovis: B (71/100)
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
Clovis water systems draw from: Groundwater, Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0028 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): 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 2 DBP Rule | Treatment Technique | 20 | 4 |
| Surface Water Treatment Rule | Treatment Technique | 5 | 4 |
| Consumer Confidence Report Rule | Reporting | 5 | 4 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 93611 | B | 6 | 2 | City of Clovis |
| 93612 | B | 6 | 2 | City of Clovis |
| 93613 | B | 6 | 2 | City of Clovis |
| 93619 | B | 6 | 2 | City of Clovis |
All ZIP Codes in Clovis
- 93611 [B] — 6 violations ⚠
- 93612 [B] — 6 violations ⚠
- 93613 [B] — 6 violations ⚠
- 93619 [B] — 6 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 Clovis
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 Clovis
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
How Old Is Clovis's Housing Stock?
Housing age data helps assess potential lead pipe and infrastructure risks. Newer housing stock generally means lower plumbing-related contamination risk.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Two regulatory milestones define plumbing-era risk in residential housing: 1970, when lead pipes were still commonly installed for service lines, and 1986, when lead solder was banned from new copper plumbing. A median build year of 1990 places Clovis in the middle zone between those thresholds — with a meaningful share of housing predating both cutoffs. The distribution shown above breaks out those eras explicitly, clarifying where concentrated risk sits across the residential inventory.
Most homes in Clovis were built after 1986, reducing the risk of lead contamination from plumbing. Older homes should still be tested.
Source: U.S. Census Bureau ACS B25034.
Clovis: Remediation Cost in Perspective
When estimated remediation is placed alongside median property values in Clovis, the resulting ratio is low — a finding consistent with a household financial perspective where documented issues can be addressed without a meaningful impact on overall equity position, making this market one of the more favorable contexts for remediation planning.
Remediation costs in Clovis are relatively low compared to home values. The $1,050–$3,350 estimated range is a small fraction of median property value. Home values are 38% below the California average.
Protecting Children from Lead in Clovis
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.
If 40% of the Clovis inventory comes from before the federal ban on lead-bearing solder — and if utility samples sit at or near 0.015 mg/L — the gap between citywide averages and one specific faucet becomes a practical concern rather than a theoretical one. That is why one-home reads exist as a separate measurement. A certified filter through retailer networks addresses confirmed exposure where it appears in a household.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Climate-Related Water Risk for Clovis
FEMA data shows 75% of Clovis's ZIP codes mapped into designated flood zones, paired with an NFIP record of 51 claims. That footprint places local flood exposure in the range where it warrants attention without rising to high-severity planning territory.
Clovis has a moderate flood history with 51 FEMA claims averaging $7,749 per payout. 75% 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>$2,050</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 Clovis, CA