Lone Rock Water Assn
EPA ID: WA5347925 · 39 people served · 6 ZIP codes
Five years of EPA monitoring have produced no violations for Lone Rock Water Assn — the supplier serving 39 residents has kept every contaminant level within federal limits, a result that places it among the top-performing utilities for systems with a service population of comparable size.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for Lone Rock Water Assn Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Lone Rock Water Assn serves a community with a median household income of $92,023 and an estimated 115,667 residents across its service area. Approximately 64% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Lone Rock Water Assn'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 1% of homes in Kitsap 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 80th 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. 4 detections recorded.
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
Lone Rock Water Assn (EPA ID: WA5347925) is a community water system in Washington that serves approximately 39 people from groundwater sources.
This system provides water to 6 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 5 additional ZIPs inferred from SDWIS registry data. The EPA-confirmed set is the most reliable; SDWIS-inferred entries may be narrower than the real deployment area.
- 98310 — Bremerton
- 98311 — Bremerton
- 98312 — Bremerton
- 98314 — Bremerton
- 98337 — Bremerton
- 98383 — Silverdale
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Lone Rock Water Assn (WA5347925) on EPA.gov.
Frequently Asked Questions
Is Lone Rock Water Assn water safe to drink?
Based on EPA records, Lone Rock Water Assn has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Lone Rock Water Assn serve?
Lone Rock Water Assn serves approximately 39 people across 6 ZIP codes in Washington.
Where does Lone Rock Water Assn get its water?
The primary water source is groundwater.