Isle Au Haut, ME: High Radon Risk — 40/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-03
The latest EPA cycle for Isle Au Haut shows a low safety grade within ME — compliance gaps have persisted over multiple reporting periods, and the city currently holds a low grade in available EPA data.
How Isle Au Haut Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Isle Au Haut Water
- Homes built before 1986: 69% — older plumbing may contain lead solder.
- Estimated remediation: $1,200 per household.
- CDC health risk index: 13.24 — above typical levels.
Who Supplies Your Water in Isle Au Haut
Federal records list 1 water system serving Isle Au Haut, ME. One provider accounts for the large majority of residential water connections in the area, concentrating infrastructure and compliance accountability.
Overview
We track water quality and home safety data for 1 ZIP code in Isle Au Haut, Maine (population ~59), covering 1 community water system serving approximately 683 people region-wide.
No EPA violations recorded across any ZIP codes in Isle Au Haut — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Isle Au Haut: D (40/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Isle Au Haut water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Isle Au Haut
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 1 (High Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 04645 | D | STONINGTON WATER COMPANY | 683 |
All ZIP Codes in Isle Au Haut
- 04645 [D]
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.
Health Outcomes in Isle Au Haut
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
Housing & Infrastructure in Isle Au Haut
With 69% of homes built before 1986, lead solder in plumbing is a potential concern. The EPA banned lead solder in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Housing age is one of the most reliable proxies for plumbing-era lead risk, because two federal milestones — the widespread use of lead pipes before 1970 and the continued use of lead solder until 1986 — define the highest-risk tiers of the residential housing stock. With a median build year of 1958, Isle Au Haut falls squarely within the older range — meaning a large fraction of the housing was built under the plumbing standards of those earlier eras. The distribution above captures where that risk concentrates, and why older neighborhoods warrant particular attention from residents concerned about tap water quality.
Over half of homes in Isle Au Haut were built before 1986, when lead solder was banned. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.
Source: U.S. Census Bureau ACS B25034.
Cost Context: What Remediation Means for Isle Au Haut Homeowners
Across Isle Au Haut, the equity share taken up by estimated remediation is small — a favorable ratio for most property owners.
Remediation costs in Isle Au Haut are relatively low compared to home values. The $800–$1,500 estimated range is a small fraction of median property value. Home values are 155% above the Maine average.
Lead Exposure Risk for Children in Isle Au Haut
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
In recent monitoring under the Lead and Copper Rule, citywide samples for Isle Au Haut have approached or crossed the regulatory action level on multiple occasions. Combined with 69% of stock dating from the pre-rule era, the picture supports baseline single-tap reads as a standard household-level step.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
What You Can Do in Isle Au Haut
- Test your water at home. City-level data shows averages — your tap may differ. NSF-certified test kits cost $20-40 and give results in days.
- Install a certified water filter. An NSF-certified pitcher or under-sink filter removes most common contaminants.
- Check your home's plumbing. With 69% of homes built before 1986, lead solder is a real possibility.
- Review your water system's CCR. Your utility publishes an annual Consumer Confidence Report with detailed test results. Request it or find it online.
Deep Dive Reports
Detailed analysis for Isle Au Haut, ME