Marianna, PA Radon Levels

Q: What EPA Radon Zone is Marianna in?

Marianna is in Washington County, EPA Zone 2.

Q: How much does radon mitigation cost in Marianna?

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

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

Marianna, PA Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)

County Washington County, PA

Zip Code 15345

Nestled in southwestern Washington County within the Pittsburgh Metro area, Marianna sits on Pennsylvanian-era sedimentary rock formations that can contribute to elevated radon levels in some areas. The community features a blend of older mining-era homes and newer suburban construction, many with full basements that can trap radon gas. Without current testing data available for zip code 15345, local homeowners should prioritize radon testing to understand their individual exposure risks.

7.80

pCi/L area average

Above EPA Action Level

Washington County average: 7.80 pCi/L, based on 5 user-submitted tests across 3 cities in the county. No homeowner readings have been submitted for Marianna 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+

Marianna, PA Radon Mitigation

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

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Radon Readings Near Marianna, PA

No homeowner tests have been submitted for Marianna yet, so the closest user-submitted readings from neighboring communities are shown below. Radon varies by home — testing is the only way to know your level.

Radon Level	City	Distance	Home Age	Foundation	Submitted
5 pCi/L	Washington, PA	12.2 mi	51-99 Years	Full Basement	Nov 2022
7 pCi/L	Canonsburg, PA	16.6 mi	21-50 Years	Full Basement	Sep 2020
11 pCi/L	Canonsburg, PA	16.6 mi	0-20 Years	Partial Basement	Oct 2019
5 pCi/L	South Park, PA	19.0 mi	21-50 Years	Partial Basement	Oct 2021
10 pCi/L	Bethel Park, PA	20.3 mi	51-99 Years	Full Basement	Feb 2019
6 pCi/L	West Newton, PA	22.4 mi	51-99 Years	Full Basement	Sep 2021
4 pCi/L	Uniontown, PA	22.7 mi	21-50 Years	Full Basement	Aug 2024
7 pCi/L	Mckeesport, PA	25.4 mi	51-99 Years	Full Basement	Jan 2024

Readings are drawn from the nearest cities with submitted data. Have a result for Marianna? Submit your reading to help your neighbors.

Washington County Radon Profile

EPA mapping assigns Washington County to Radon Zone 2, indicating moderate predicted indoor screening levels in the 2 to 4 pCi/L range based on regional geology. Homeowner-submitted tests from 3 cities in Washington County average 7.80 pCi/L across 5 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 Washington County home regardless of zone or a neighbor's results.

Radon FAQ for Marianna, PA

What EPA Radon Zone is Marianna in?

Marianna and the 15345 zip code are in Washington County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.

Why are radon readings shown from areas near Marianna?

No homeowner radon tests have been submitted for Marianna yet. Because radon is driven by regional soil and bedrock geology, readings from the closest cities—and the Washington County average—are the best available indicator of local conditions until Marianna 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 Marianna?

Radon mitigation in Marianna 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 Marianna?

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.

Radon Levels Near Marianna, PA

User-submitted radon levels from the cities closest to Marianna with recorded test data. Explore nearby communities to compare local readings.

City	Distance	Avg User Level	Submissions
Washington	12.2 mi	5.00 pCi/L	1
Canonsburg	16.6 mi	8.33 pCi/L	3
South Park	19.0 mi	7.00 pCi/L	2
Bethel Park	20.3 mi	10.00 pCi/L	1
West Newton	22.4 mi	6.00 pCi/L	1
Uniontown	22.7 mi	4.00 pCi/L	1
Burgettstown	28.6 mi	9.00 pCi/L	1