Willow Grove, PA Radon Levels

Q: What EPA Radon Zone is Willow Grove in?

Willow Grove is in Montgomery County, EPA Zone 1.

Q: How much does radon mitigation cost in Willow Grove?

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

Check local Willow Grove radon levels and find certified testing and mitigation professionals to keep your home safe

Willow Grove, PA Radon Facts

EPA Radon Zone Zone 1 — High Risk > 4.0 pCi/L (Zone 1)

County Montgomery County, PA

Zip Code 19090

Situated in Montgomery County within the Philadelphia metro area, Willow Grove lies in EPA Zone 1 - Pennsylvania's highest radon potential region - due to underlying Reading Prong geology and uranium-bearing rock formations. While specific testing data for zip code 19090 is currently limited, the area's geological conditions and prevalence of basement-equipped homes create significant radon risk. Given Pennsylvania's statewide radon concerns, professional testing and potential mitigation should be priorities for all Willow Grove residents.

8.41

pCi/L area average

Above EPA Action Level

Montgomery County average: 8.41 pCi/L, based on 17 user-submitted tests across 16 cities in the county. No homeowner readings have been submitted for Willow Grove itself yet, so this county figure is the closest available benchmark. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Willow Grove, PA Radon Mitigation

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

Need Radon Mitigation or Testing in Willow Grove?

100% Free, No-Obligation Quotes
Matches You with State-Licensed Montgomery County Pros

1-800-299-3578 610-255-7504 (local) Toll-free · Mon–Fri 8am–6pm ET

Radon Readings Near Willow Grove, PA

No homeowner tests have been submitted for Willow Grove yet. The closest cities with user-submitted radon data are shown below — explore them to gauge local conditions. Radon varies by home, so testing is the only way to know your level.

City	Distance	Avg User Level	Readings
Horsham	2.1 mi	20.00 pCi/L	1
Abington	2.4 mi	8.00 pCi/L	1
Glenside	3.6 mi	7.00 pCi/L	1
Warminster	4.0 mi	11.00 pCi/L	3
Jenkintown	4.2 mi	7.00 pCi/L	1
Ambler	5.0 mi	4.00 pCi/L	1
Wyncote	5.0 mi	20.00 pCi/L	1
Elkins Park	5.7 mi	10.67 pCi/L	3

Montgomery County Radon Profile

Because of its underlying geology, Montgomery County is mapped as EPA Radon Zone 1 — the most elevated classification — where predicted indoor screening averages exceed 4 pCi/L. Homeowner-submitted tests from 16 cities in Montgomery County average 8.41 pCi/L across 17 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. As the second leading cause of lung cancer in the U.S., radon warrants testing in every Montgomery County home regardless of zone or a neighbor's results.

Radon FAQ for Willow Grove, PA

What EPA Radon Zone is Willow Grove in?

Willow Grove and the 19090 zip code are in Montgomery 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.

Why are radon readings shown from areas near Willow Grove?

No homeowner radon tests have been submitted for Willow Grove yet. Because radon is driven by regional soil and bedrock geology, readings from the closest cities—and the Montgomery County average—are the best available indicator of local conditions until Willow Grove homeowners submit their own results. The EPA still recommends testing every individual home, since levels can vary significantly from house to house.

How much does radon mitigation cost in Willow Grove?

Radon mitigation in Willow Grove 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 Willow Grove?

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.