Lake Margaret Water System
EPA ID: WA5344200 · 406 people served · 2 ZIP codes
Five clean years on EPA record — Lake Margaret Water System, 406 residents served.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for Lake Margaret Water System Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Lake Margaret Water System serves a community with a median household income of $156,842 and an estimated 19,393 residents across its service area.
🌊 Where Does Your Water Come From?
Lake Margaret Water System's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.
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.
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
Lake Margaret Water System (EPA ID: WA5344200) is a community water system in Washington that serves approximately 406 people from surface water sources.
This system provides water to 2 ZIP codes across 2 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: 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 Lake Margaret Water System (WA5344200) on EPA.gov.
Frequently Asked Questions
Is Lake Margaret Water System water safe to drink?
Based on EPA records, Lake Margaret Water System has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Lake Margaret Water System serve?
Lake Margaret Water System serves approximately 406 people across 2 ZIP codes in Washington.
Where does Lake Margaret Water System get its water?
The primary water source is surface water.
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.