Chester Public U.d.
EPA ID: CA3210009 · 2,187 people served · 1 ZIP code
ZipCheckup's reading of EPA records for Chester Public U.d. (CA3210009): 1 health-based violation recorded since 2021. Looking at the EPA enforcement file for Chester Public U.d., 1 violation is listed in the dataset, and none is recorded as open for the 2,187 people in its service area.
Data: EPA SDWIS
Service Area Map
Coverage area for Chester Public U.d. Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Chester Public U.d. have a median household income of $82,123 and about 2,404 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 54% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: On average, 100% of census tracts in the counties mapped to this service area are designated disadvantaged by the federal Climate and Economic Justice Screening Tool (CEJST, 2022 version). Communities with higher disadvantaged populations often face disproportionate environmental and health burdens, including aging water infrastructure and limited resources for remediation.
💧 Where Does Your Water Come From?
Chester Public U.d.'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
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
Chester Public U.d. (EPA ID: CA3210009) is a community water system in California that serves approximately 2,187 people from groundwater sources.
This system serves ZIP code 96020 in Chester.
Violation History
Status breakdown for accepted records with record years 2021-2026: 1 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
| Date | Contaminant | Type | Status |
|---|---|---|---|
| October 1, 2021 | Revised Total Coliform Rule | Health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Revised Total Coliform Rule | MCL Violation | 1 | Yes |
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
1 of 1 ZIP records with known zones is in EPA Radon Zone 2.
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.
- 96020 - Chester
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Chester Public U.d. (CA3210009) on EPA.gov.
Frequently Asked Questions
Is Chester Public U.d. water safe to drink?
The accepted 2026Q2 ECHO snapshot shows no current noncompliance for Chester Public U.d.; its 1 accepted 2021-2026 record are resolved or archived. Historical compliance status does not establish conditions at a specific tap.
How many people does Chester Public U.d. serve?
Chester Public U.d. serves approximately 2,187 people across 1 ZIP code in California.
Where does Chester Public U.d. get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Chester Public U.d. (CA): 1 Health Violation. https://zipcheckup.com/water-system/ca3210009/
@misc{zipcheckup-water-system-ca3210009,
author = {{ZipCheckup}},
title = {{Chester Public U.d. (CA): 1 Health Violation}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/ca3210009/}
}
What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Chester Public U.d. (EPA ID: CA3210009) - request the latest Consumer Confidence Report or ask about specific contaminants.