Penngrove Water Company (puc)
EPA ID: CA4910003 · 1,742 people served · 6 ZIP codes
ZipCheckup's reading of EPA records for Penngrove Water Company (puc) (CA4910003): no drinking-water violations recorded since 2021. With no violations in its EPA file, Penngrove Water Company (puc) serves 1,742 residents.
Data: EPA SDWIS
Service Area Map
Coverage area for Penngrove Water Company (puc) Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Penngrove Water Company (puc) have a median household income of $105,335 and about 168,067 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 64% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Penngrove Water Company (puc)'s water is classified in EPA records as a groundwater source. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
Infrastructure Risk
PFAS in ZIP Codes This System Serves
PFAS ("forever chemicals") have been reported in samples from water systems associated with the ZIP codes in this system's area. These results can come from other water systems serving the same ZIP codes; check the UCMR5 section for any results reported for this system. 3 detections recorded. 1 detection is above the level of a federal PFAS MCL (4 ppt for PFOA and PFOS), with compliance required from 2029.
Comparable Water Systems
Similar-sized systems in California
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
Penngrove Water Company (puc) (EPA ID: CA4910003) is a community water system in California that serves approximately 1,742 people from groundwater sources.
This system provides water to 6 ZIP codes across 5 communities.
Violation History
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| Below the reporting limit | No | 2024-12-31 |
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
6 of 6 ZIP records with known zones are in EPA Radon Zone 3.
The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.
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
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Penngrove Water Company (puc) (CA4910003) on EPA.gov.
Frequently Asked Questions
Is Penngrove Water Company (puc) water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Penngrove Water Company (puc) in the inclusive 2021-2026 record-year window. This is a compliance-record finding, not a guarantee about water at a specific tap.
How many people does Penngrove Water Company (puc) serve?
Penngrove Water Company (puc) serves approximately 1,742 people across 6 ZIP codes in California.
Where does Penngrove Water Company (puc) get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Penngrove Water Company (puc) Water Quality Report, CA. https://zipcheckup.com/water-system/ca4910003/
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