Sumas Rural Water Association
EPA ID: WA5384850 · 612 people served · 3 ZIP codes
With a five-year violation-free history, Sumas Rural Water Association delivers safe water to 612 residents.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for Sumas Rural Water Association Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Sumas Rural Water Association serves a community with a median household income of $95,225 and an estimated 34,424 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?
Sumas Rural Water Association'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.
About 2% of homes in Whatcom County, Washington rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
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
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
Sumas Rural Water Association (EPA ID: WA5384850) is a community water system in Washington that serves approximately 612 people from groundwater sources.
This system provides water to 3 ZIP codes across 3 communities.
Violation History
Lead & Copper
No Lead and Copper Rule sampling data available for this water system.
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 Sumas Rural Water Association (WA5384850) on EPA.gov.
Frequently Asked Questions
Is Sumas Rural Water Association water safe to drink?
Based on EPA records, Sumas Rural Water Association has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Sumas Rural Water Association serve?
Sumas Rural Water Association serves approximately 612 people across 3 ZIP codes in Washington.
Where does Sumas Rural Water Association get its water?
The primary water source is groundwater.