Custer Water Association
EPA ID: WA5317050 · 365 people served · 2 ZIP codes
ZipCheckup's reading of EPA records for Custer Water Association (WA5317050): no drinking-water violations recorded since 2021. Water monitoring history at Custer Water Association, as reported to the EPA, contains no recorded violations; 365 residents are counted in its service population.
Data: EPA SDWIS
Service Area Map
Coverage area for Custer Water Association Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Custer Water Association have a median household income of $94,486 and about 21,965 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 40% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Custer Water Association'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.
Superfund Proximity Note: This service area ranks in the 70th percentile nationally for proximity to Superfund (NPL) sites. Groundwater sources near contaminated sites may face elevated risk from industrial chemicals.
Infrastructure Risk
Comparable Water Systems
Similar-sized systems in Washington
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
Custer Water Association (EPA ID: WA5317050) is a community water system in Washington that serves approximately 365 people from groundwater 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 |
|---|---|---|
| 0.0036 mg/L | No | 2023-12-31 |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
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: Ask your water utility whether running cold water for 2 minutes is enough to flush your plumbing before drinking.
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 WA 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 Custer Water Association (WA5317050) on EPA.gov.
Frequently Asked Questions
Is Custer Water Association water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Custer Water Association 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 Custer Water Association serve?
Custer Water Association serves approximately 365 people across 2 ZIP codes in Washington.
Where does Custer Water Association get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Custer Water Association Water Quality Report, WA. https://zipcheckup.com/water-system/wa5317050/
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title = {{Custer Water Association Water Quality Report, WA}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/wa5317050/}
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