Westside Water Assn
EPA ID: WA5394950 · 562 people served · 1 ZIP code
ZipCheckup's reading of EPA SDWIS for Westside Water Assn (WA5394950): 1 unresolved EPA violation on record. Within the EPA compliance database, Westside Water Assn shows 1 violation still pending resolution - a status that applies across the full service territory of approximately 562 people and reflects findings that have not yet cleared the federal enforcement process or received formal closure.
Data: EPA SDWIS
Service Area Map
Coverage area for Westside Water Assn Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Westside Water Assn serves a community with a median household income of $115,750 and an estimated 10,424 residents across its service area. Approximately 68% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Westside Water Assn's water is pumped from underground aquifers. 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
Detected Contaminants
How Westside Water Assn compares to EPA limits
What This Means For You
Stage 1 DBP Rule at 1 mg/L exceeds the EPA maximum of mg/L.
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
Westside Water Assn (EPA ID: WA5394950) is a community water system in Washington that serves approximately 562 people from groundwater sources.
This system serves ZIP code 98070 in Vashon.
Violation History
Status breakdown for accepted records with record years 2021-2026: 0 resolved, 0 archived, 0 addressed, and 1 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 |
|---|---|---|---|
| January 1, 2023 | Stage 1 DBP Rule | Non-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 1 DBP Rule | Treatment Failure | 1 | No |
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.0017 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 WA or modeled from parcel and building-footprint data.
- 98070 - Vashon
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Westside Water Assn (WA5394950) on EPA.gov.
Frequently Asked Questions
Is Westside Water Assn water safe to drink?
The accepted 2026Q2 ECHO snapshot shows 1 current noncompliance record and zero current records classified as health-based. That classification is not a property-specific water test or safety guarantee.
How many people does Westside Water Assn serve?
Westside Water Assn serves approximately 562 people across 1 ZIP code in Washington.
Where does Westside Water Assn get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Westside Water Assn (WA): 1 EPA Violation. https://zipcheckup.com/water-system/wa5394950/
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author = {{ZipCheckup}},
title = {{Westside Water Assn (WA): 1 EPA Violation}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/wa5394950/}
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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
Westside Water Assn (EPA ID: WA5394950) - request the latest Consumer Confidence Report or ask about specific contaminants.