Graham Hill Mutual Water Company Inc.
EPA ID: WA5328650 · 1,440 people served · 2 ZIP codes
ZipCheckup's reading of EPA SDWIS for Graham Hill Mutual Water Company Inc. (WA5328650): 1 EPA violation in the last five years. Graham Hill Mutual Water Company Inc. recorded 1 EPA violation over the past five years, all of which have since been resolved - the utility is currently in compliance serving 1,440 residents.
Data: EPA SDWIS
Service Area Map
Coverage area for Graham Hill Mutual Water Company Inc. Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Graham Hill Mutual Water Company Inc. serves a community with a median household income of $113,345 and an estimated 43,948 residents across its service area.
💧 Where Does Your Water Come From?
Graham Hill Mutual Water Company Inc.'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
Detected Contaminants
How Graham Hill Mutual Water Company Inc. 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. 3 detections recorded. 2 exceed federal EPA limits (4 ppt for PFOA/PFOS).
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
Graham Hill Mutual Water Company Inc. (EPA ID: WA5328650) is a community water system in Washington that serves approximately 1,440 people from groundwater sources.
This system provides water to 2 ZIP codes across 2 communities.
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, 2023 | 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 |
|---|---|---|
| 0.0023 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 Graham Hill Mutual Water Company Inc. (WA5328650) on EPA.gov.
Frequently Asked Questions
Is Graham Hill Mutual Water Company Inc. water safe to drink?
The accepted 2026Q2 ECHO snapshot shows no current noncompliance for Graham Hill Mutual Water Company Inc.; 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 Graham Hill Mutual Water Company Inc. serve?
Graham Hill Mutual Water Company Inc. serves approximately 1,440 people across 2 ZIP codes in Washington.
Where does Graham Hill Mutual Water Company Inc. get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Graham Hill Mutual Water Company Inc. (WA): 1 EPA Violation. https://zipcheckup.com/water-system/wa5328650/
@misc{zipcheckup-water-system-wa5328650,
author = {{ZipCheckup}},
title = {{Graham Hill Mutual Water Company Inc. (WA): 1 EPA Violation}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/wa5328650/}
}
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
Graham Hill Mutual Water Company Inc. (EPA ID: WA5328650) - request the latest Consumer Confidence Report or ask about specific contaminants.