Orange, CT Radon Mitigation and Testing

Q: What is the average radon level in Orange, CT?

Based on 4 user-submitted tests, the average radon level is 8.50 pCi/L.

Q: What EPA Radon Zone is Orange in?

Orange is in New Haven County, EPA Zone 1.

Q: How much does radon mitigation cost in Orange?

Radon mitigation typically costs between $800 and $2,000. Most standard systems fall in the $1,000-$1,500 range.

Avg: 8.50 pCi/L

New Haven County

EPA Zone 1

4 user tests

This New Haven County community has shown significant radon concerns, with an average reading of 8.5 pCi/L from recent testing data in the 06477 zip code area—more than double the EPA action level. Connecticut's glacial geology and the prevalence of full basement foundations in older New England homes create conditions where radon can accumulate to dangerous levels. Given that readings have ranged from 4.0 to 20.0 pCi/L locally, all Orange residents should prioritize professional radon testing and consider mitigation if levels exceed EPA guidelines.

8.50

pCi/L average

Above EPA Action Level

Based on 4 user-submitted radon tests for homes in Orange, CT. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Orange, CT Radon Mitigation

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

Orange, CT Radon Testing

Finding qualified radon testing professionals is the first step toward protecting your home.

Orange, Connecticut Radon Levels

User-submitted radon test readings from homes in the Orange area.

Radon Level	City	Home Age	Foundation	Submitted
6 pCi/L	Orange, CT	0-20 Years	Full Basement	Dec 2025
4 pCi/L	Orange, CT	21-50 Years	—	Dec 2024
20 pCi/L	Orange, CT	0-20 Years	Full Basement	Mar 2023

Have a radon test result for Orange? Submit your reading to help other homeowners.

Orange Radon Facts

Key details about the radon risk profile for Orange and the 06477 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

New Haven County, CT

Zip Code

06477

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

8.50 pCi/L

User Tests Submitted

Orange and the 06477 zip code are located in New Haven County, which has an EPA assigned Radon Zone of 1. A radon zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Orange, CT

What is the average radon level in Orange, CT?

Based on 4 user-submitted tests, the average radon level in Orange is 8.50 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.

What EPA Radon Zone is Orange in?

Orange and the 06477 zip code are in New Haven County, which has an EPA assigned Radon Zone of 1. A zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L.

How much does radon mitigation cost in Orange?

Radon mitigation in Orange typically costs between $800 and $2,000. Most homes with standard basements can be mitigated with a sub-slab depressurization system in the $1,000–$1,500 range. Factors that can increase cost include complex foundations, crawl spaces, or very high radon levels.

Should I test for radon if I'm buying a home in Orange?

Yes. Radon testing should be part of every home purchase. A short-term radon test is typically included as part of the home inspection process and costs $150–$250. If elevated levels are found, you can negotiate mitigation as part of the sale.

Most Active Radon Markets in Connecticut

Cities with the most user-submitted radon test data in the state.

City	Avg User Radon Level	Submissions
Hamden	4.75 pCi/L	4
West Hartford	4.25 pCi/L	4
Greenwich	7.67 pCi/L	3
Norwalk	7.00 pCi/L	1
Stamford	5.00 pCi/L	1
Middletown	4.00 pCi/L	1
Guilford	No submissions	0
Ridgefield	No submissions	0