Issaquah Valley Water Assn #1
EPA ID: WA5336300 · 80 people served · 2 ZIP codes
Even as other utilities in the region logged violations, Issaquah Valley Water Assn #1 kept a clean EPA record — five years, no issues, 80 people served.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for Issaquah Valley Water Assn #1 Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Issaquah Valley Water Assn #1 serves a community with a median household income of $157,029 and an estimated 59,265 residents across its service area.
💧 Where Does Your Water Come From?
Issaquah Valley Water Assn #1'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 King 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
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 6 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
Issaquah Valley Water Assn #1 (EPA ID: WA5336300) is a community water system in Washington that serves approximately 80 people from groundwater sources.
This system provides water to 2 ZIP codes across 1 community.
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: 1 ZIP code confirmed via EPA Community Water System Service Area Boundaries v3 plus 1 additional ZIP inferred from SDWIS registry data. The EPA-confirmed set is the most reliable; SDWIS-inferred entries may be narrower than the real deployment area.
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Issaquah Valley Water Assn #1 (WA5336300) on EPA.gov.
Frequently Asked Questions
Is Issaquah Valley Water Assn #1 water safe to drink?
Based on EPA records, Issaquah Valley Water Assn #1 has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Issaquah Valley Water Assn #1 serve?
Issaquah Valley Water Assn #1 serves approximately 80 people across 2 ZIP codes in Washington.
Where does Issaquah Valley Water Assn #1 get its water?
The primary water source is groundwater.