Willow Creek C.s.d.
EPA ID: CA1210015 · 1,298 people served · 4 ZIP codes
ZipCheckup's reading of EPA SDWIS for Willow Creek C.s.d. (CA1210015): 3 unresolved EPA violations on record. Pulled from the federal compliance ledger, 3 violations at Willow Creek C.s.d. remain without resolution - the utility delivers drinking water to roughly 1,298 residents.
Data: EPA SDWIS
Service Area Map
Coverage area for Willow Creek C.s.d. Source: EPA SDWIS service area boundaries.
Service area boundary - Grade A
Service Area Demographics
The Willow Creek C.s.d. serves a community with a median household income of $43,576 and an estimated 4,629 residents across its service area. 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
Detected Contaminants
How Willow Creek C.s.d. compares to EPA limits
What This Means For You
Stage 2 DBP Rule at 3 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
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 | Stage 2 DBP Rule | Non-health-based | Unaddressed (current) |
| October 17, 2024 | Stage 2 DBP Rule | Non-health-based | Unaddressed (current) |
| October 17, 2024 | Stage 2 DBP Rule | Health-based | Unaddressed (current) |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Stage 2 DBP Rule | Treatment Failure | 3 | Yes |
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0 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.
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 3 (Low Risk)
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.
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record 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/
@misc{zipcheckup-water-system-ca1210015,
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
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
Willow Creek C.s.d. (EPA ID: CA1210015) - request the latest Consumer Confidence Report or ask about specific contaminants.