Walczak 620
EPA ID: WA5392350 · 256 people served · 1 ZIP code
ZipCheckup's reading of EPA records for Walczak 620 (WA5392350): no drinking-water violations recorded since 2021. Within the EPA records available for it, Walczak 620 shows no violations; the system serves about 256 people.
Data: EPA SDWIS
Service Area Map
Coverage area for Walczak 620 Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Walczak 620 have a median household income of $116,613 and about 22,135 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 56% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Walczak 620'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
PFAS in ZIP Codes This System Serves
PFAS ("forever chemicals") have been reported in samples from water systems associated with the ZIP codes in this system's area. These results can come from other water systems serving the same ZIP codes; check the UCMR5 section for any results reported for this system. 2 detections recorded.
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
Walczak 620 (EPA ID: WA5392350) is a community water system in Washington that serves approximately 256 people from groundwater sources.
This system serves ZIP code 98022 in Enumclaw.
Violation History
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.0089 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.
- 98022 - Enumclaw
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Walczak 620 (WA5392350) on EPA.gov.
Frequently Asked Questions
Is Walczak 620 water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Walczak 620 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 Walczak 620 serve?
Walczak 620 serves approximately 256 people across 1 ZIP code in Washington.
Where does Walczak 620 get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Walczak 620 Water Quality Report, WA. https://zipcheckup.com/water-system/wa5392350/
@misc{zipcheckup-water-system-wa5392350,
author = {{ZipCheckup}},
title = {{Walczak 620 Water Quality Report, WA}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/wa5392350/}
}