Willow Creek C.s.d.
EPA ID: CA1210015 · 1,298 people served · 4 ZIP codes
ZipCheckup's reading of EPA records for Willow Creek C.s.d. (CA1210015): 3 violations recorded with unresolved status in the SDWIS data used. Open violations at Willow Creek C.s.d. number 3 in the EPA compliance data, for a system that serves about 1,298 people. An open status describes how each violation is logged in the federal record; it is not a measurement of what comes out of any individual tap.
Data: EPA SDWIS
Service Area Map
Coverage area for Willow Creek C.s.d. Source: EPA SDWIS service area boundaries.
Service area boundary - average Home Safety grade of mapped ZIPs: A
Demographics of ZIP Codes Served
The ZIP codes associated with Willow Creek C.s.d. have a median household income of $43,576 and about 4,629 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 59% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
🌊 Where Does Your Water Come From?
Willow Creek C.s.d.'s water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.
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
Willow Creek C.s.d. (EPA ID: CA1210015) is a community water system in California that serves approximately 1,298 people from surface water sources.
This system provides water to 4 ZIP codes across 4 communities.
ZIP-Area Home Safety Context: A (95/100)
This is the average Home Safety Score for 1 of 4 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: 0 resolved, 0 archived, 0 addressed, and 3 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 |
|---|---|---|---|
| July 2, 2025 | LEAD AND COPPER RULE REVISIONS | Non-health-based | Unaddressed (current) |
| October 17, 2024 | LEAD AND COPPER RULE REVISIONS | Non-health-based | Unaddressed (current) |
| October 17, 2024 | LEAD AND COPPER RULE REVISIONS | Health-based | Unaddressed (current) |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| LEAD AND COPPER RULE REVISIONS | Treatment Technique, Monitoring & Reporting | 3 | 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 | 2020-12-31 |
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
4 of 4 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.
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Willow Creek C.s.d. (CA1210015) on EPA.gov.
Frequently Asked Questions
Is Willow Creek C.s.d. water safe to drink?
The accepted 2026Q2 ECHO snapshot shows 1 current health-based noncompliance record for Willow Creek C.s.d.. Review the utility's current notices and EPA record. This system-level compliance history cannot determine conditions at a specific tap.
How many people does Willow Creek C.s.d. serve?
Willow Creek C.s.d. serves approximately 1,298 people across 4 ZIP codes in California.
Where does Willow Creek C.s.d. get its water?
The primary water source is surface water.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Willow Creek C.s.d. (CA): 1 Health Violation. https://zipcheckup.com/water-system/ca1210015/
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author = {{ZipCheckup}},
title = {{Willow Creek C.s.d. (CA): 1 Health Violation}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/ca1210015/}
}
What You Can Do
Test your water
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Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Willow Creek C.s.d. (EPA ID: CA1210015) - request the latest Consumer Confidence Report or ask about specific contaminants.