Willapa Valley Water District
EPA ID: WA5397100 · 2,425 people served · 6 ZIP codes
ZipCheckup's reading of EPA records for Willapa Valley Water District (WA5397100): no drinking-water violations recorded since 2021. With no violations in its EPA file, Willapa Valley Water District serves 2,425 residents.
Data: EPA SDWIS
Service Area Map
Coverage area for Willapa Valley Water District Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Willapa Valley Water District have a median household income of $72,241 and about 15,989 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 70% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: On average, 55% of census tracts in the counties mapped to this service area are designated disadvantaged by the federal Climate and Economic Justice Screening Tool (CEJST, 2022 version). 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?
Willapa Valley Water District'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 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
Willapa Valley Water District (EPA ID: WA5397100) is a community water system in Washington that serves approximately 2,425 people from surface water sources.
This system provides water to 6 ZIP codes across 6 communities.
Violation History
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 | 2024-12-31 |
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
6 of 6 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 WA or modeled from parcel and building-footprint data.
- 98537 - Cosmopolis
- 98577 - Raymond
- 98586 - South Bend
- 98614 - Chinook
- 98624 - Ilwaco
- 98638 - Naselle
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Willapa Valley Water District (WA5397100) on EPA.gov.
Frequently Asked Questions
Is Willapa Valley Water District water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Willapa Valley Water District 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 Willapa Valley Water District serve?
Willapa Valley Water District serves approximately 2,425 people across 6 ZIP codes in Washington.
Where does Willapa Valley Water District get its water?
The primary water source is surface water.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Willapa Valley Water District Water Quality Report, WA. https://zipcheckup.com/water-system/wa5397100/
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title = {{Willapa Valley Water District Water Quality Report, WA}},
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