Golden State Water Company-clearlake System
EPA ID: CA1710002 · 4,644 people served · 2 ZIP codes
ZipCheckup's reading of EPA SDWIS for Golden State Water Company-clearlake System (CA1710002): no EPA violations recorded in the last five years. Across every monitored period in the past five years, Golden State Water Company-clearlake System reported no EPA violations for its service population of 4,644.
Data: EPA SDWIS
Service Area Map
Coverage area for Golden State Water Company-clearlake System Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Golden State Water Company-clearlake System serves a community with a median household income of $42,625 and an estimated 20,533 residents across its service area. Approximately 67% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 73% 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?
Golden State Water Company-clearlake System'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.
Superfund Proximity Note: This service area ranks in the 60th percentile nationally for proximity to Superfund (NPL) sites.
Infrastructure Risk
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 2 detections recorded.
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
Golden State Water Company-clearlake System (EPA ID: CA1710002) is a community water system in California that serves approximately 4,644 people from surface water sources.
This system provides water to 2 ZIP codes across 2 communities.
Violation History
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.0041 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.
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Golden State Water Company-clearlake System (CA1710002) on EPA.gov.
Frequently Asked Questions
Is Golden State Water Company-clearlake System water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Golden State Water Company-clearlake System 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 Golden State Water Company-clearlake System serve?
Golden State Water Company-clearlake System serves approximately 4,644 people across 2 ZIP codes in California.
Where does Golden State Water Company-clearlake System get its water?
The primary water source is surface water.
Federal UCMR5 PFAS Monitoring: Tested Clean
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). No PFAS compounds were detected.
Current MCL reflects the lowest state-enforceable limit (NYS 10 ppt for PFOA/PFOS, effective August 2020). The federal final MCL of 4 ppt for PFOA/PFOS (EPA April 2024 rule) is not enforceable until April 2029. Detections above 4 ppt but below 10 ppt are below current MCL but above the future federal limit.
Source: U.S. EPA UCMR5 (Unregulated Contaminant Monitoring Rule, 5th cycle) — per-system federal sampling, 2023–2025. EPA UCMR5 monitoring program →
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Golden State Water Company-clearlake System Water Report, CA. https://zipcheckup.com/water-system/ca1710002/
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