City of Rohnert Park

ZipCheckup's reading of EPA SDWIS for City of Rohnert Park (CA4910014): 2 EPA violations in the last five years. Dating back across the full five-year EPA tracking window, City of Rohnert Park encountered 2 violations, each subsequently remedied and closed - today the utility meets all federal drinking water requirements for the 43,821 residents in its service area and holds no open enforcement actions.

Data: EPA SDWIS

System Overview

City of Rohnert Park, (EPA ID: CA4910014) is a community water system in California that serves approximately 43,821 people from groundwater sources.

This system provides water to 7 ZIP codes across 5 communities.

ZIP-Area Home Safety Context: B (81/100)

This is the average Home Safety Score for 1 of 7 service-area ZIP codes with all required score domains observed. It is not a grade for the water utility.

Model 4.0.0 uses SDWIS identity plus accepted ECHO SDWA lifecycle-based water compliance, the UCMR 5 PFAS MCL screen, EPA radon zone, and annual EPA AirData AQI across three equally weighted domains. Missing required evidence suppresses the score.

Violation History

Status breakdown for accepted records with record years 2021-2026: 2 resolved, 0 archived, 0 addressed, and 0 unaddressed. Under this source contract, current noncompliance is the sum of addressed and unaddressed records. Archived and resolved records are excluded from current noncompliance.

Recent Violations

Contaminants Detected

The following contaminants have been flagged in EPA records for this water system:

Lead & Copper

EPA Lead and Copper Rule evidence attributed directly to this water system:

No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.

Radon Risk in Service Area

Dominant radon zone for ZIP codes served by this system: Zone 3 (Low Risk)

ZIP Codes Served

Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by CA or modeled from parcel and building-footprint data.

• 94928 - Rohnert Park
• 94931 - Cotati
• 94951 - Penngrove
• 94952 - Petaluma
• 94954 - Petaluma
• 95404 - Santa Rosa
• 95407 - Santa Rosa

Data Sources

This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for City of Rohnert Park (CA4910014) on EPA.gov.

Frequently Asked Questions

Is City of Rohnert Park water safe to drink?

The accepted 2026Q2 ECHO snapshot shows no current noncompliance for City of Rohnert Park; its 2 accepted 2021-2026 records are resolved or archived. Historical compliance status does not establish conditions at a specific tap.

How many people does City of Rohnert Park serve?

City of Rohnert Park serves approximately 43,821 people across 7 ZIP codes in California.

Where does City of Rohnert Park get its water?

The primary water source is groundwater.

@misc{zipcheckup-water-system-ca4910014,
  author = {{ZipCheckup}},
  title  = {{City of Rohnert Park (CA): 2 EPA Violations}},
  year   = {n.d.},
  url    = {https://zipcheckup.com/water-system/ca4910014/}
}