North Lopez Service
EPA ID: WA5360665 · 114 people served · 1 ZIP code
In every reporting cycle over the past five years, North Lopez Service has come through without a single EPA violation — a consistent performance across the full service population of approximately 114 residents that reflects both well-maintained infrastructure and reliable operational oversight.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for North Lopez Service Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The North Lopez Service serves a community with a median household income of $78,871 and an estimated 3,030 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?
North Lopez Service'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 3% of homes in San Juan County, Washington rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
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
North Lopez Service (EPA ID: WA5360665) is a community water system in Washington that serves approximately 114 people from groundwater sources.
This system serves ZIP code 98261 in Lopez Island.
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
- 98261 — Lopez Island
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for North Lopez Service (WA5360665) on EPA.gov.
Frequently Asked Questions
Is North Lopez Service water safe to drink?
Based on EPA records, North Lopez Service has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does North Lopez Service serve?
North Lopez Service serves approximately 114 people across 1 ZIP code in Washington.
Where does North Lopez Service 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.