South Fox Island Water System
EPA ID: WA5315532 · 493 people served · 1 ZIP code
ZipCheckup's reading of EPA records for South Fox Island Water System (WA5315532): no drinking-water violations recorded since 2021. Water monitoring history at South Fox Island Water System, as reported to the EPA, contains no recorded violations; 493 residents are counted in its service population.
Data: EPA SDWIS
Service Area Map
Coverage area for South Fox Island Water System Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with South Fox Island Water System have a median household income of $172,917 and about 3,365 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 40% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
South Fox Island Water System's water is classified in EPA records as a groundwater source. 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.
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
Comparable Water Systems
Similar-sized systems in Washington
System Overview
South Fox Island Water System (EPA ID: WA5315532) is a community water system in Washington that serves approximately 493 people from groundwater sources.
This system serves ZIP code 98333 in Fox Island.
Violation History
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.002 mg/L | No | 2023-12-31 |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
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: Ask your water utility whether running cold water for 2 minutes is enough to flush your plumbing before drinking.
ZIP Codes Served
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by WA or modeled from parcel and building-footprint data.
- 98333 - Fox Island
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for South Fox Island Water System (WA5315532) on EPA.gov.
Frequently Asked Questions
Is South Fox Island Water System water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for South Fox Island Water System in the inclusive 2021-2026 record-year window. This is a compliance-record finding, not a guarantee about water at a specific tap.
How many people does South Fox Island Water System serve?
South Fox Island Water System serves approximately 493 people across 1 ZIP code in Washington.
Where does South Fox Island Water System get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). South Fox Island Water System Water Quality Report, WA. https://zipcheckup.com/water-system/wa5315532/
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title = {{South Fox Island Water System Water Quality Report, WA}},
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