Sebastopol, CA: 2 Health Violations — 88/100 (2026)
2 ZIP codes · 12 water systems · Updated 2026-06-03
Tap water in Sebastopol, CA scores well — low violation counts, above-average safety grade.
How Sebastopol Compares
Data: EPA SDWIS Last verified: 2026-06-03
Key Facts for Sebastopol Residents
- Your city's water systems recorded 4 violations in the past 5 years.
- Average lead level: 0.0034 mg/L.
- Estimated remediation: $900 per household.
- CDC health risk index: 11.32.
Sebastopol's Water Providers
Residential addresses in Sebastopol, CA are served by 3 primary water providers out of 12 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 2 ZIP codes in Sebastopol, California (population ~28,588), covering 12 community water systems serving approximately 208,322 people region-wide.
2 of 2 ZIP codes (100%) have recorded EPA violations. 2 health-based violations documented.
Home Safety Score
Average Home Safety Score for Sebastopol: A (88/100)
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
Sebastopol water systems draw from: Groundwater, Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0034 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 |
|---|---|---|---|
| Stage 2 DBP Rule | Treatment Technique | 6 | 2 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 95472 | B | 2 | 1 | City of Sebastopol, |
| 95473 | A | 2 | 1 | City of Sebastopol, |
All ZIP Codes in Sebastopol
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.
Sebastopol 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 Sebastopol's Water?
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
How Remediation Costs Compare in Sebastopol
Low proportionality — that's the Sebastopol picture when remediation costs are placed against typical home equity.
Remediation costs in Sebastopol are relatively low compared to home values. The $550–$1,500 estimated range is a small fraction of median property value. Home values are 35% above the California average.
Sebastopol: 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 Sebastopol 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.
Sebastopol: Flood History & Water Damage Risk
Flood exposure in Sebastopol is meaningful by NFIP measures — 125 claims on record and 50% of ZIP codes carrying FEMA flood zone designations. That level of activity makes flood history a relevant factor when evaluating local water quality over time.
Sebastopol has a moderate flood history with 125 FEMA claims averaging $17,679 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>$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.
Deep Dive Reports
Detailed analysis for Sebastopol, CA