Water Quality Report

Cornish, ME (04020): High Radon Potential Area

EPA data combined for 2 water systems mapped to this ZIP (largest mapped system: Maine Water Company Kezar Falls Division)

High County Radon Potential

EPA records for the water systems mapped to 04020 in Cornish, ME contain zero recorded violations for inclusive record years 2021 through 2026. This does not establish that every category was monitored or published, and it does not cover events outside that source window.

Data source: U.S. Environmental Protection Agency (EPA) SDWIS

Based on EPA Drinking Water FEMA Flood Data U.S. Census CDC Energy Information Admin. USGS Water Data & 9 more federal sources
Latest air quality, EPA records and weather alerts Current data temporarily unavailable
Current EPA violation data unavailable
Water records and current conditions
Current EPA violation data unavailable
Safety Score N/A
Water Quality No violations
Lead Risk Below action level Below the reporting limit, 90th percentile, sample period ending 2026-06-30
NFIP Claim History N/A
Data confidence: High (direct measurement) Medium (sampled / sub-geography) Low (modeled / inferred) Methodology →

At a Glance

  • Water No drinking-water violations in EPA records since 2021.
  • Lead The reported 90th-percentile lead result is below the laboratory reporting limit, not a measured zero; EPA's health goal for lead is zero.
  • Radon EPA Zone 1 - highest county-level potential. This is not a home measurement; test before any threshold comparison.
Contaminant Summary
Evidence unavailable
Report data assembled: Jul 27, 2026 EPA water-system identity: source date or period is not present in ZipCheckup's accepted source record EPA violation history: more than two update cycles old Lead, copper and UCMR measurements: source date or period is not present in ZipCheckup's accepted source record
2
Water Systems
1,115
People Served
0
Health Violations (since 2021)
Groundwater
Water Source
Zone 1
County Radon Potential · High
$244K
Median Home ValueState median: $230K

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Score Breakdown

Overall Home Safety Score: Score unavailable

Required evidence is missing. Missing values remain unknown and are not imputed or renormalized.

Canonical components

EPA water compliance
100/100
Observed
PFAS MCL screen
Unknown
Evidence missing
EPA radon zone
0/100
Observed
Annual EPA AirData AQI
100/100
Observed

Required domains

Drinking water
Unknown
Indoor environment
0/100
Outdoor environment
100/100

Coverage: 3 of 4 components and 2 of 3 domains observed.

Model 4.0.0; series home-safety-v4-cross-vertical.

Safety & Health (6) HIGH

Your Water System

ZIP code 04020 in Cornish, Maine is mapped to the water system Maine Water Company Kezar Falls Division (EPA ID: ME0090770). This system provides water to approximately 1,115 people from groundwater sources.

There are 2 community water systems serving this area.

Water Systems Serving This Area

System Name EPA ID Population Source
Maine Water Company Kezar Falls Division ME0090770 1,115 Groundwater
Cornish Water District ME0090380 758 Groundwater

Other Water Quality Reports in Maine

Nearby Water Quality Reports

Data Sources

This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Maine Water Company Kezar Falls Division (ME0090770) on EPA.gov.

5 of the top compounds applied across the surrounding county in USGS pesticide-use estimates appear on EPA drinking-water monitoring lists. See the agricultural pesticide-use section.

📊 EPA Safe Drinking Water · View source →
Environmental Hazards (10) MODERATE
Home & Infrastructure (8) OK
Cost & Community (9) HIGH

CPSC product recall notices

These national notices are not matched to this ZIP code or water system.

View all recalls →

📊 CPSC · View source →

Protect Your Home in Cornish

Based on local data for ZIP 04020, these services may benefit homeowners in your area.

Based on local data for your area. Use the tools below to explore your options.

Gutter Installation & Repair

The median home in 04020 was built around 1975. Aging gutters can cause foundation damage, basement flooding, and mold - a professional assessment can prevent costly repairs.

Typical cost: Gutter installation: typically $1,000–$2,500 for a standard home

Estimate Your Home Maintenance Costs

Window Replacement

The median build year of homes in Cornish is 1975; check the age and condition of your own windows. ENERGY STAR windows can save $101–$583/year on energy bills.

Typical cost: Window replacement: typically $300–$800 per window installed

Estimate Your Home Maintenance Costs

Roofing Inspection & Repair

Homes built around 1975 may be on their second or third roof. A professional inspection can catch damage before leaks start.

Typical cost: Roof inspection: typically $75–$300; repairs $300–$1,500

Estimate Your Home Insurance Needs

Service recommendations are based on public data for this ZIP code (FEMA, Census ACS, NWS). Actual needs vary by property. By calling, your information will be shared with an independent service provider. ZipCheckup may receive compensation. Cost estimates are approximate and vary by property, condition, and contractor.

Frequently Asked Questions

Is the tap water in 04020 safe to drink?

EPA SDWIS records 0 violations since 2021 across the water systems mapped to ZIP 04020 (primary system: Maine Water Company Kezar Falls Division), including 0 health-based. The violation table above shows which system each record belongs to. ZipCheckup last updated this page in July 2026. The federal source release date is unavailable, so that month is not presented as source currency.

Where does 04020's water come from?

The recorded water source for Maine Water Company Kezar Falls Division, a system mapped to ZIP code 04020, is Groundwater. This system serves approximately 1,115 people.

How can I get my water tested in Cornish?

If Maine Water Company Kezar Falls Division supplies your home, contact it for its Consumer Confidence Report; otherwise contact the water utility that serves your address, or hire a certified lab for independent home water testing. The EPA recommends annual testing if you use a private well.

What is the radon risk for 04020?

04020 is mapped to a county in EPA Radon Zone 1 (high county-level radon potential; EPA recommends testing every home), located in York County. EPA radon zones range from Zone 1 (highest county-level potential) to Zone 3 (lowest). Testing your home is recommended regardless of zone.

How to cite this page

APA ZipCheckup. (2026). Cornish, ME (04020): High Radon Potential Area. https://zipcheckup.com/report/04020/
BibTeX 
@misc{zipcheckup-report-04020,
  author = {{ZipCheckup}},
  title  = {{Cornish, ME (04020): High Radon Potential Area}},
  year   = {2026},
  url    = {https://zipcheckup.com/report/04020/}
}

Page version: October 2026.

Nearby ZIP Code Reports

Water quality comparison for ZIP codes near 04020

ZIP Code City, State Distance Grade Violations
04091 West Baldwin, ME 3.8 mi N/A 0
04028 East Parsonsfield, ME 4.6 mi N/A 0
04048 Limerick, ME 5.8 mi C 6
04049 Limington, ME 6.3 mi C 3
04041 Hiram, ME 6.8 mi N/A 0
04085 Steep Falls, ME 6.9 mi C 6
04047 Parsonsfield, ME 7.0 mi N/A 0
04024 East Baldwin, ME 7.3 mi N/A 0
04068 Porter, ME 8.0 mi N/A 0
04056 Newfield, ME 9.5 mi N/A 0

Overall safety breakdown

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Coverage: 14/17 risk factors Data sources →
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