White Oak Mutual Water Company
EPA ID: CA4500204 · 415 people served · 1 ZIP code
ZipCheckup's reading of EPA SDWIS for White Oak Mutual Water Company (CA4500204): 1 EPA violation in the last five years. Since the flagged events, White Oak Mutual Water Company resolved all 1 violation - compliant today, 415 residents served.
Data: EPA SDWIS
Service Area Map
Coverage area for White Oak Mutual Water Company Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The White Oak Mutual Water Company serves a community with a median household income of $87,220 and an estimated 16,497 residents across its service area. Approximately 48% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 100% of the population in this service area is classified as disadvantaged under EPA's EJScreen criteria. 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?
White Oak Mutual Water Company's water is pumped from underground aquifers. 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
Detected Contaminants
How White Oak Mutual Water Company compares to EPA limits
What This Means For You
Consumer Confidence Report Rule at 1 mg/L exceeds the EPA maximum of mg/L.
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
White Oak Mutual Water Company (EPA ID: CA4500204) is a community water system in California that serves approximately 415 people from groundwater sources.
This system serves ZIP code 96022 in Cottonwood.
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 |
|---|---|---|---|
| June 1, 2022 | Consumer Confidence Report Rule | Non-health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Consumer Confidence Report Rule | Reporting Failure | 1 | No |
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.00101 mg/L | No | N/A |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
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.
- 96022 - Cottonwood
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for White Oak Mutual Water Company (CA4500204) on EPA.gov.
Frequently Asked Questions
Is White Oak Mutual Water Company water safe to drink?
The accepted 2026Q2 ECHO snapshot shows no current noncompliance for White Oak Mutual Water Company; 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 White Oak Mutual Water Company serve?
White Oak Mutual Water Company serves approximately 415 people across 1 ZIP code in California.
Where does White Oak Mutual Water Company get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). White Oak Mutual Water Company (CA): 1 EPA Violation. https://zipcheckup.com/water-system/ca4500204/
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author = {{ZipCheckup}},
title = {{White Oak Mutual Water Company (CA): 1 EPA Violation}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/ca4500204/}
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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
White Oak Mutual Water Company (EPA ID: CA4500204) - request the latest Consumer Confidence Report or ask about specific contaminants.