Maplewood Addition Water Coop
EPA ID: WA5351400 · 435 people served · 1 ZIP code
ZipCheckup's reading of EPA SDWIS for Maplewood Addition Water Coop (WA5351400): 1 EPA violation in the last five years. Looking at the EPA enforcement file for Maplewood Addition Water Coop, 1 violation appear in the five-year dataset, but none remain open - the utility has addressed each finding and is in current compliance, with no pending enforcement affecting the 435 people in its service area.
Data: EPA SDWIS
Service Area Map
Coverage area for Maplewood Addition Water Coop Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Maplewood Addition Water Coop serves a community with a median household income of $111,045 and an estimated 41,980 residents across its service area. Approximately 62% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Maplewood Addition Water Coop'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 Maplewood Addition Water Coop compares to EPA limits
What This Means For You
Surface Water Treatment Rule at 1 mg/L exceeds the EPA maximum of mg/L.
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 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
Maplewood Addition Water Coop (EPA ID: WA5351400) is a community water system in Washington that serves approximately 435 people from groundwater sources.
This system serves ZIP code 98058 in Renton.
Violation History
Status breakdown for accepted records with record years 2021-2026: 1 resolved, 0 archived, 0 addressed, and 0 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 |
|---|---|---|---|
| July 1, 2021 | Surface Water Treatment Rule | Non-health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Surface Water Treatment 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 |
|---|---|---|
| 0.0006 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.
- 98058 - Renton
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Maplewood Addition Water Coop (WA5351400) on EPA.gov.
Frequently Asked Questions
Is Maplewood Addition Water Coop water safe to drink?
The accepted 2026Q2 ECHO snapshot shows no current noncompliance for Maplewood Addition Water Coop; its 1 accepted 2021-2026 record are resolved or archived. Historical compliance status does not establish conditions at a specific tap.
How many people does Maplewood Addition Water Coop serve?
Maplewood Addition Water Coop serves approximately 435 people across 1 ZIP code in Washington.
Where does Maplewood Addition Water Coop get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Maplewood Addition Water Coop (WA): 1 EPA Violation. https://zipcheckup.com/water-system/wa5351400/
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author = {{ZipCheckup}},
title = {{Maplewood Addition Water Coop (WA): 1 EPA Violation}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/wa5351400/}
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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
Maplewood Addition Water Coop (EPA ID: WA5351400) - request the latest Consumer Confidence Report or ask about specific contaminants.