Frederick, MD Radon Mitigation and Testing

Q: What is the average radon level in Frederick, MD?

Based on 7 user-submitted tests, the average radon level is 8.30 pCi/L.

Q: What EPA Radon Zone is Frederick in?

Frederick is in Frederick County, EPA Zone 1.

Q: How much does radon mitigation cost in Frederick?

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

Avg: 8.30 pCi/L

Frederick County

EPA Zone 1

7 user tests

Frederick is located in Frederick County, Maryland. With 7 user-submitted readings averaging 8.30 pCi/L, the area exceeds the EPA's 4.0 pCi/L action threshold, and testing is strongly recommended for homeowners in the 21701 zip code.

8.30

pCi/L average

Above EPA Action Level

Based on 7 user-submitted radon tests for homes in Frederick, MD. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Frederick, MD Radon Mitigation

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

Frederick, MD Radon Testing

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

Frederick, Maryland Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
6 pCi/L	Frederick, MD	0-20 Years	Full Basement	Mar 2025
5 pCi/L	Frederick, MD	51-99 Years	Full Basement	Dec 2024
9 pCi/L	Frederick, MD	0-20 Years	No Basement/All Slab	Sep 2023
12 pCi/L	Frederick, MD	0-20 Years	Full Basement	Apr 2023
10 pCi/L	Frederick, MD	0-20 Years	—	Nov 2022

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

Frederick Radon Facts

Key details about the radon risk profile for Frederick and the 21701 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Frederick County, MD

Zip Code

21701

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

8.30 pCi/L

User Tests Submitted

Frederick and the 21701 zip code are located in Frederick 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 Frederick, MD

What is the average radon level in Frederick, MD?

Based on 7 user-submitted tests, the average radon level in Frederick is 8.30 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 Frederick in?

Frederick and the 21701 zip code are in Frederick 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 Frederick?

Radon mitigation in Frederick 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 Frederick?

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 Maryland

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

City	Avg User Radon Level	Submissions
Frederick	8.29 pCi/L	7
Potomac	9.00 pCi/L	6
Hagerstown	8.67 pCi/L	6
Westminster	14.50 pCi/L	4
Baltimore	7.00 pCi/L	4
Annapolis	4.25 pCi/L	4
Upper Marlboro	15.00 pCi/L	3
Edgewater	12.67 pCi/L	3
Bowie	9.00 pCi/L	3
Clarksburg	8.00 pCi/L	3
Gambrills	6.00 pCi/L	3
Elkton	5.33 pCi/L	3
Silver Spring	4.33 pCi/L	3
Chesapeake Beach	14.00 pCi/L	2
Cumberland	9.00 pCi/L	2
Frostburg	9.00 pCi/L	2
Owings	5.50 pCi/L	2
Huntingtown	4.50 pCi/L	2
Mc Henry	20.00 pCi/L	1
Mount Airy	20.00 pCi/L	1