Home hazard report for 06255 — North Grosvenordale, CT
ZIP 06255 is served by Ctwc - Thompson System: no health-based violations since 2016, latest lead result 1.1 ppb, PFAS not tested. Windham County is in EPA radon zone 2.
No health-based violations reported since 2016.
90th-percentile lead in the latest round (Jan 2025). Lead comes mostly from household plumbing and service lines, so individual homes can be higher.
This system was not part of EPA’s 2023–2025 nationwide PFAS testing (UCMR 5 covers systems serving over 3,300 people and a sample of smaller ones).
Predicted average indoor radon between 2 and 4 pCi/L. Test your home; many homes here exceed 4 pCi/L.
The nearest active Superfund site is 4.8 miles away.
Active weather alerts
live from the National Weather ServiceChecking the National Weather Service…
Where ZIP 06255 is
Dashed: ZIP area · blue: utility service area · scroll or pinch to zoomDrinking water: Ctwc - Thompson System
Health-based violations
No health-based violations reported since 2016.
Lead
90th-percentile lead per sampling round (90% of the homes sampled were at or below this level). Black line: EPA’s 15 ppb action level; under the Lead and Copper Rule Improvements the action level becomes 10 ppb from 2027.
PFAS (“forever chemicals”)
This system was not part of EPA’s 2023–2025 nationwide PFAS testing (UCMR 5).
Radon in Windham County
EPA radon zone 2 — moderate potential. Predicted average indoor radon between 2 and 4 pCi/L. Test your home; many homes here exceed 4 pCi/L.
Radon is a colorless, odorless radioactive gas from soil and rock, and the leading cause of lung cancer among non-smokers. EPA recommends fixing a home at 4 pCi/L or above and considering it from 2 pCi/L. A short-term test kit costs about $15–30. How radon zones work →
Superfund sites nearby
| Site | Status | Distance |
|---|---|---|
| Linemaster Switch Corp. Woodstock, Connecticut · EPA ID CTD001153923 | Active (final NPL) | 4.8 mi |
EPA Superfund National Priorities List (NPL): the country’s most serious known hazardous-waste sites, each with an EPA cleanup record (linked). Distance is measured from the ZIP center to the site’s reference point; being near a site does not by itself mean exposure — EPA site pages describe what was found and how it is being cleaned up.
What this is — and isn’t. These are records your water utility and state reported to the EPA, and the EPA’s radon map for your county. They describe the system and the area, not the water from your own tap or the air in your home. For that, read your utility’s annual Consumer Confidence Report and test: lead and radon tests are inexpensive.
Questions about 06255
Who supplies drinking water to ZIP 06255?
Ctwc - Thompson System (EPA ID CT1410011), a groundwater (wells) system serving about 1,070 people.
Is there lead in North Grosvenordale, CT tap water?
The utility’s latest 90th-percentile lead result (Jan 2025) was 1.1 ppb; EPA’s action level is 15 ppb, falling to 10 ppb from 2027. Lead mostly comes from service lines and home plumbing, so the only way to know your tap is to test it.
Does North Grosvenordale, CT water have PFAS?
This system was not part of EPA’s 2023–2025 nationwide PFAS testing (UCMR 5 covers systems serving over 3,300 people and a sample of smaller ones).
Has the water system in 06255 had violations?
No health-based violations reported since 2016.
Are there Superfund sites near 06255?
The nearest active Superfund site is 4.8 miles away. Sites within 10 miles: Linemaster Switch Corp. (4.8 mi, Active (final NPL)).
Is radon a problem in Windham County?
Windham County is in EPA radon zone 2 (moderate potential). Predicted average indoor radon between 2 and 4 pCi/L. Test your home; many homes here exceed 4 pCi/L.