Pennsylvania · all 67 counties

Radon help for Pennsylvania homes, starting with your ZIP.

352 certified testing firms · short-term tests take 2–7 days 101 certified mitigation firms · get two written quotes 18 DEP-certified radon labs Enter your result, then your ZIP, city or county

DEP ID on every listingCheck it against the state record.
Never ranked by paymentOrdered by location and name.
Sourced and datedRefreshed with each DEP list.

414 certified firms (101 mitigation, 352 testing, 18 labs) and 742 certified individuals, taken from Pennsylvania DEP records. Every listing names the firm, shows its DEP IDs and links the source.

Our advice

Test before you call a mitigator.

Radon varies house to house, even on the same street. A test costs far less than a system, and it tells you whether you need one at all.

Testing vs. mitigation, explained →

Get two written quotes.

Ask each certified mitigator for their DEP certification ID, and retest after the system is installed. A national cost guide puts typical systems at $786–$1,274.

Typical costs and estimate tool →

Use a kit analyzed by a certified lab.

Pennsylvania requires labs that analyze radon for the public to be DEP-certified. Follow the kit's placement and timing instructions, then mail it promptly.

What is radon? →

What your number means

EPA recommends fixing at 4 pCi/L or more, and considering it between 2 and 4.

024 = EPA action level

Confirming a high result →

Already have a test result? Check your number

Based on EPA guidance. General information, not medical advice.

1
Test your home
A short-term test takes 2–7 days. Hire a certified tester or use a mail-in kit from a DEP-certified lab.
352 testers · 18 labs
2
Understand the number
EPA recommends fixing at 4 pCi/L or more, and considering it between 2 and 4.
Levels in your county
3
Fix it if needed
Get two written quotes from certified mitigators. Most systems cost $786–$1,274.
101 mitigation firms

Radon by county

In Allegheny County, 34% of basement tests came back high.

Counties with the most certified firms
County	Percent	Firms
Allegheny	34%	44
Montgomery	28%	29
Bucks	31%	19
Chester	31%	18
Westmoreland	40%	17
Luzerne	31%	13
Butler	47%	12
Delaware	20%	12

Tick = statewide 37% · PA DEP test results, 1986–presentAll 67 counties →

Highest share of high tests

#1Fulton70%
#2Juniata62%
#3Perry61%
#4Lebanon60%
#5Mifflin59%
#6Franklin59%

Share of basement tests ≥ 4 pCi/L. Only a test tells you your home's level.

Full county table →

PA DEP estimates about 40% of Pennsylvania homes tested have radon above EPA's 4 pCi/L action guideline (PA DEP Radon Division). In DEP's test records, 37% of basement tests statewide are at or above 4 pCi/L.