Rohnert Park, CA Water Safety: 94/100 (2026)
3 ZIP codes · 10 water systems · Updated 2026-06-03
How does Rohnert Park tap water hold up under EPA scrutiny? Above average for CA — documented violations are uncommon and the safety grade reflects a clean overall record.
How Rohnert Park Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Rohnert Park Water
- Average lead level: 0.0061 mg/L.
- Estimated remediation: $1,800 per household.
- CDC health risk index: 11.32.
Who Supplies Your Water in Rohnert Park
Federal drinking water records identify 10 systems in Rohnert Park, 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 3 ZIP codes in Rohnert Park, California (population ~46,463), covering 10 community water systems serving approximately 240,449 people region-wide.
No EPA violations recorded across any ZIP codes in Rohnert Park — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Rohnert Park: A (94/100)
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
Rohnert Park water systems draw from: Groundwater, Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0061 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): 3 ZIP codes
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 94926 | A | City of Rohnert Park, | 43,821 |
| 94927 | A | City of Rohnert Park, | 43,821 |
| 94928 | A | City of Rohnert Park, | 43,821 |
All ZIP Codes in Rohnert Park
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 Rohnert Park
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
Cost Context: What Remediation Means for Rohnert Park Homeowners
Remediation costs in Rohnert Park are small relative to typical property values — the cost-to-value ratio here is favorable.
Remediation costs in Rohnert Park are relatively low compared to home values. The $1,200–$2,600 estimated range is a small fraction of median property value. Home values are 14% below the California average.
Lead Exposure Risk for Children in Rohnert Park
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 Rohnert Park 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 Rohnert Park
Multiple flood events have been recorded for Rohnert Park through the NFIP — 5 claims in total, with 33% of ZIP codes in FEMA-designated zones — pointing to a flood exposure profile that merits inclusion in a water quality assessment without reaching high-severity planning territory.
Rohnert Park has a moderate flood history with 5 FEMA claims averaging $239 per payout. 33% 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>$1,800</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 Rohnert Park, CA