Lake Minterwood
EPA ID: WA5355210 · 1,539 people served · 2 ZIP codes
ZipCheckup's reading of EPA SDWIS for Lake Minterwood (WA5355210): no EPA violations recorded in the last five years. From the earliest to the most recent cycle in the five-year EPA window, Lake Minterwood has logged zero violations - no MCL exceedances, no health advisories, and no enforcement activity across the entire period for the 1,539 people in its service area, a record that stands up well against both state and national benchmarks.
Data: EPA SDWIS
Service Area Map
Coverage area for Lake Minterwood Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Lake Minterwood serves a community with a median household income of $77,234 and an estimated 12,415 residents across its service area. Approximately 51% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Lake Minterwood'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 80th 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
Lake Minterwood (EPA ID: WA5355210) is a community water system in Washington that serves approximately 1,539 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 |
|---|---|---|
| 0.002 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.
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Lake Minterwood (WA5355210) on EPA.gov.
Frequently Asked Questions
Is Lake Minterwood water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Lake Minterwood 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 Lake Minterwood serve?
Lake Minterwood serves approximately 1,539 people across 2 ZIP codes in Washington.
Where does Lake Minterwood get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Lake Minterwood Water Quality Report, WA. https://zipcheckup.com/water-system/wa5355210/
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author = {{ZipCheckup}},
title = {{Lake Minterwood Water Quality Report, WA}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/wa5355210/}
}