MacKaye Harbor Water District
EPA ID: WA5312911 · 133 people served · 1 ZIP code
ZipCheckup's reading of EPA records for MacKaye Harbor Water District (WA5312911): 1 violation on record since 2021. MacKaye Harbor Water District has 1 EPA violation on record, all marked resolved in the federal data; the utility serves 133 residents.
Data: EPA SDWIS
Service Area Map
Coverage area for MacKaye Harbor Water District Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with MacKaye Harbor Water District have a median household income of $78,871 and about 3,030 residents live in those ZIP codes (Census; not the number of people this system supplies). 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?
MacKaye Harbor Water District'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.
Infrastructure Risk
Comparable Water Systems
Similar-sized systems in Washington
System Overview
MacKaye Harbor Water District (EPA ID: WA5312911) is a community water system in Washington that serves approximately 133 people from groundwater sources.
This system serves ZIP code 98261 in Lopez Island.
Violation History
Status breakdown for accepted records with record years 2021-2026: 1 resolved, 0 archived, 0 addressed, and 0 unaddressed. Under this source contract, current noncompliance is the sum of addressed and unaddressed records. Archived and resolved records are excluded from current noncompliance.
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| July 1, 2021 | Consumer Confidence Rule | Non-health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Consumer Confidence Rule | Other (notice or report rule) | 1 | No |
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.0015 mg/L | No | 2024-12-31 |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Radon Risk in Service Area
1 of 1 ZIP records with known zones is in EPA Radon Zone 3.
The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.
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.
- 98261 - Lopez Island
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for MacKaye Harbor Water District (WA5312911) on EPA.gov.
Frequently Asked Questions
Is MacKaye Harbor Water District water safe to drink?
The accepted 2026Q2 ECHO snapshot shows no current noncompliance for MacKaye Harbor Water District; its 1 accepted 2021-2026 record are resolved or archived. Historical compliance status does not establish conditions at a specific tap.
How many people does MacKaye Harbor Water District serve?
MacKaye Harbor Water District serves approximately 133 people across 1 ZIP code in Washington.
Where does MacKaye Harbor Water District get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). MacKaye Harbor Water District (WA): 1 EPA Violation. https://zipcheckup.com/water-system/wa5312911/
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author = {{ZipCheckup}},
title = {{MacKaye Harbor Water District (WA): 1 EPA Violation}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/wa5312911/}
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What You Can Do
Test your water
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Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
MacKaye Harbor Water District (EPA ID: WA5312911) - request the latest Consumer Confidence Report or ask about specific contaminants.