Radon in South Central Connecticut Planning Region, Connecticut
South Central Connecticut Planning Region, Connecticut, is in EPA radon Zone 1: predicted average indoor radon screening level greater than 4 pCi/L (highest potential). No laboratory test results are on file for this county (no tests reported, or too few to publish).
Radon test results in South Central Connecticut Planning Region
No radon test results are on file for South Central Connecticut Planning Region. Its EPA zone is Zone 1.
Test results describe buildings whose owners chose to test and whose results reached the lab or agency, not a random sample; small counts swing widely. State and US shares are computed from county counts and percents. The laboratory data comes from national radon testing laboratories and supplements EPA's zone map.
Former Connecticut counties in this region
| Former county | EPA zone | Towns | Share of land |
|---|---|---|---|
| New Haven County | Zone 1 | 15 | 100% |
Towns are matched by name between the old counties and the new planning regions.
Radon in nearby counties
| County | EPA zone | Lab tests | 4 pCi/L or more |
|---|---|---|---|
| Lower Connecticut River Valley Planning Region, CT | Zone 1 | n/a | n/a |
| Naugatuck Valley Planning Region, CT | Mixed (Zones 1 and 2 and 3) | n/a | n/a |
| Greater Bridgeport Planning Region, CT | Zone 1 | n/a | n/a |
| Suffolk County, NY | Zone 3 | 397 | 8% |
| Western Connecticut Planning Region, CT | Mixed (Zones 1 and 2) | n/a | n/a |
| Capitol Planning Region, CT | Mixed (Zones 2 and 3) | n/a | n/a |
The six counties with the nearest centers.
What to do about radon in South Central Connecticut Planning Region
Test the building. EPA recommends fixing a home at 4 pCi/L or more and considering a fix between 2 and 4 pCi/L, and says there is no known safe level of exposure. Connecticut's state radon program can point you to testers and test kits.
Buying here? The Environmental Records Report lists this county's radon zone and test results with the flood zone, mapped faults, power lines and federal contamination records near the address.
Radon in South Central Connecticut Planning Region: questions
What is the radon level in South Central Connecticut Planning Region?
No laboratory results are on file for South Central Connecticut Planning Region. The county's EPA zone is Zone 1. Only a test of the building gives its level.
Is South Central Connecticut Planning Region in radon Zone 1?
Yes. EPA's 1993 Map of Radon Zones puts South Central Connecticut Planning Region in Zone 1, the counties with a predicted average indoor radon screening level above 4 pCi/L.
Should I test for radon in South Central Connecticut Planning Region?
Yes. EPA recommends testing every home whatever its zone: "This map should not be used to determine if individual homes need to be tested." Fix the home at 4 pCi/L or more and consider a fix between 2 and 4 pCi/L; EPA says there is no known safe level of radon exposure.
More for South Central Connecticut Planning Region
- Who owns this LLC?The Secretary of State record for an LLC, with its registered agent and listed principals.
- South Central Connecticut Planning Region loan limitsThis year's FHFA conforming, FHA and VA county loan limits for 1 to 4 unit homes, from FHFA's and HUD's official files.
- South Central Connecticut Planning Region fair market rentHUD Fair Market Rents for studios to 4 bedrooms, the voucher payment standard range and the change from last year.
- South Central Connecticut Planning Region property tax rateEffective property tax rate from Census survey data: median taxes paid against median home value, ranked in the state.
- Environmental records reportSuperfund, hazardous waste, leaking tank and brownfield sites near any South Central Connecticut Planning Region address, with distances and a site map. A records search, not a Phase I.
- Superfund sites in ConnecticutEvery EPA Superfund site in Connecticut with its status, county and a map, refreshed nightly from federal records.
- USDA eligibility map: ConnecticutHow much of each Connecticut county is in a USDA-eligible rural area, the towns mapped ineligible, and a free address check.
- Opportunity zones in ConnecticutEvery designated Opportunity Zone tract in Connecticut by county, from the IRS list, and the tracts eligible for the 2027 round.
- Census tract lookupThe census tract of any South Central Connecticut Planning Region address with its FFIEC income level and HUD Qualified Census Tract and DDA status.
Other free hazard lookups
- Fault lines near an addressUSGS-mapped earthquake faults within 5 miles, their age and slip rate, and the USGS seismic hazard value.
- Power lines near an addressHigh-voltage transmission lines within 1 mile from federal maps, with voltage and distance.
- Flood zone lookupThe FEMA flood zone mapped at any US address. Not an official flood zone determination.
- Superfund sites near an addressThe nearest EPA Superfund (NPL) sites and their status.
All of these, plus wetlands, FEMA hazard ratings and the federal contamination lists, are in the Environmental Records Report for any US address ($29).
Radon in every Connecticut county · Radon map of every state
Data compiled 2026-10-20. County FIPS 09170. County-level screening information, not a radon measurement of any building.