Maple Falls Water Coop
EPA ID: WA5351100 · 194 people served · 1 ZIP code
In the most recent five-year monitoring window, Maple Falls Water Coop posted zero EPA violations serving 194 residents.
Data: EPA SDWIS Last verified: 2026-04-02
Compliance Trajectory
Stable · Risk tier: High · 93% chance of violation in next 12 months
Violations went from 3 (2024) to 1 (2025). Violation counts have remained relatively steady.
Service Area Map
Coverage area for Maple Falls Water Coop Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Maple Falls Water Coop serves a community with a median household income of $53,115 and an estimated 4,198 residents across its service area. Approximately 50% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Maple Falls 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.
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
Maple Falls Water Coop (EPA ID: WA5351100) is a community water system in Washington that serves approximately 194 people from groundwater sources.
This system serves ZIP code 98266 in Maple Falls.
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
- 98266 — Maple Falls
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Maple Falls Water Coop (WA5351100) on EPA.gov.
Frequently Asked Questions
Is Maple Falls Water Coop water safe to drink?
Based on EPA records, Maple Falls Water Coop has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Maple Falls Water Coop serve?
Maple Falls Water Coop serves approximately 194 people across 1 ZIP code in Washington.
Where does Maple Falls Water Coop get its water?
The primary water source is groundwater.
Lead Service Line Inventory
Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:
This system reports zero confirmed lead service lines in its inventory. Unknown-material counts may still warrant verification.
Federal LCRI rule (effective October 2024) requires every public water system to inventory its service lines and complete lead-line replacement within 10 years.
Source: EPA SDWIS Federal Service Line Inventory (Phase 2) · Submitted 2026
ZipCheckup is not affiliated with the utility or state agency. Inventory figures render verbatim from the public LCRI submission cited above; ZipCheckup does not perform inspections or replacements.