Arthur, IL Radon Levels

Q: What EPA Radon Zone is Arthur in?

Arthur is in Douglas County, EPA Zone 1.

Q: Why are radon readings shown from areas near Arthur?

No homeowner radon tests have been submitted for Arthur yet, so readings from the closest cities and the Douglas County average are used as the best available indicator of local conditions. The EPA recommends testing every individual home.

Q: How much does radon mitigation cost in Arthur?

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

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

Arthur, IL Radon Facts

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

County Douglas County, IL

Zip Code 61911

Located in Douglas County within Illinois's central prairie region, Arthur in zip code 61911 sits atop glacial moraine deposits over limestone bedrock that contribute to elevated radon potential. This Amish community features traditional housing alongside conventional residential construction, with many properties including basement foundations typical of central Illinois building practices. While specific testing data for Arthur remains limited, the underlying geological conditions common to Douglas County suggest homeowners should consider radon testing.

17.00

pCi/L area average

Above EPA Action Level

Douglas County average: 17.00 pCi/L, based on 1 user-submitted test across 1 city in the county. No homeowner readings have been submitted for Arthur 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+

Arthur, IL 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 Arthur, IL

No homeowner tests have been submitted for Arthur 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
Tuscola	11.2 mi	17.00 pCi/L	1
Mattoon	16.3 mi	9.33 pCi/L	3
Charleston	21.3 mi	8.00 pCi/L	1
Monticello	22.8 mi	4.50 pCi/L	2
Shelbyville	25.4 mi	17.00 pCi/L	1
Champaign	29.9 mi	6.67 pCi/L	3
Urbana	30.1 mi	15.00 pCi/L	1
Moweaqua	30.5 mi	7.00 pCi/L	1

Douglas County Radon Profile

Because of its underlying geology, Douglas 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 1 city in Douglas County average 17.00 pCi/L across 1 test — 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 Douglas County home regardless of zone or a neighbor's results.

Radon FAQ for Arthur, IL

What EPA Radon Zone is Arthur in?

Arthur and the 61911 zip code are in Douglas 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 Arthur?

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

Radon mitigation in Arthur 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 Arthur?

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.