Downingtown, PA Radon Mitigation and Testing

Q: What is the average radon level in Downingtown, PA?

Based on 1 user-submitted tests, the average radon level is 20.00 pCi/L.

Q: What EPA Radon Zone is Downingtown in?

Downingtown is in Chester County, EPA Zone 1.

Q: How much does radon mitigation cost in Downingtown?

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

Avg: 20.00 pCi/L

Chester County

EPA Zone 1

1 user test

Downingtown is located in Chester County, Pennsylvania. With 1 user-submitted readings averaging 20.00 pCi/L, the area exceeds the EPA's 4.0 pCi/L action threshold, and testing is strongly recommended for homeowners in the 19335 zip code.

20.00

pCi/L average

Above EPA Action Level

Based on 1 user-submitted radon test for homes in Downingtown, PA. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Downingtown, PA Radon Mitigation

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

Downingtown, PA Radon Testing

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

Downingtown, Pennsylvania Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
20 pCi/L	Downingtown, PA	0-20 Years	Full Basement	Mar 2019

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

Downingtown Radon Facts

Key details about the radon risk profile for Downingtown and the 19335 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Chester County, PA

Zip Code

19335

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

20.00 pCi/L

User Tests Submitted

Downingtown and the 19335 zip code are located in Chester 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 Downingtown, PA

What is the average radon level in Downingtown, PA?

Based on 1 user-submitted test, the average radon level in Downingtown is 20.00 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 Downingtown in?

Downingtown and the 19335 zip code are in Chester 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 Downingtown?

Radon mitigation in Downingtown 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 Downingtown?

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 Pennsylvania

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

City	Avg User Radon Level	Submissions
State College	10.00 pCi/L	14
Chambersburg	10.14 pCi/L	7
Easton	12.33 pCi/L	6
Butler	12.40 pCi/L	5
Dingmans Ferry	5.80 pCi/L	5
Hanover	14.00 pCi/L	4
Mechanicsburg	13.75 pCi/L	4
Greenville	10.75 pCi/L	4
Pittsburgh	9.25 pCi/L	4
Albrightsville	9.00 pCi/L	4
Philadelphia	8.00 pCi/L	4
Lackawaxen	15.33 pCi/L	3
York	11.67 pCi/L	3
Elizabethtown	9.67 pCi/L	3
Johnstown	7.33 pCi/L	3
West Chester	6.67 pCi/L	3
Danville	5.67 pCi/L	3
Springfield	5.67 pCi/L	3
East Stroudsburg	5.00 pCi/L	3
Langhorne	4.67 pCi/L	3