Biggsville, IL Radon Levels

Q: What EPA Radon Zone is Biggsville in?

Biggsville is in Henderson County, EPA Zone 1.

Q: How much does radon mitigation cost in Biggsville?

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

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

Biggsville, IL Radon Facts

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

County Henderson County, IL

Zip Code 61418

This Henderson County community sits along the Mississippi River bluffs, where loess deposits over limestone bedrock create high radon potential throughout western Illinois. Although specific testing data for the 61418 zip code isn't available, the area's geological composition strongly suggests elevated radon risk. Residents should test their homes promptly, especially those with full basements typical of the region's early-to-mid 20th century housing stock.

13.00

pCi/L area average

Above EPA Action Level

Henderson County average: 13.00 pCi/L, based on 2 user-submitted tests across 1 city in the county. No homeowner readings have been submitted for Biggsville 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+

Biggsville, IL 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 Biggsville?

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

1-800-299-3578 309-716-3952 (local) Toll-free · Mon–Fri 8am–6pm ET

Radon Readings Near Biggsville, IL

No homeowner tests have been submitted for Biggsville 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
Stronghurst	7.9 mi	13.00 pCi/L	2
Monmouth	11.7 mi	8.00 pCi/L	1
Dallas City	24.0 mi	9.00 pCi/L	1
Knoxville	30.0 mi	8.00 pCi/L	1
New Windsor	31.6 mi	6.00 pCi/L	1
Orion	43.0 mi	4.00 pCi/L	1
Cuba	43.0 mi	6.00 pCi/L	1
Coal Valley	45.1 mi	12.00 pCi/L	1

Henderson County Radon Profile

Because of its underlying geology, Henderson 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 Henderson County average 13.00 pCi/L across 2 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 Henderson County home regardless of zone or a neighbor's results.

Radon FAQ for Biggsville, IL

What EPA Radon Zone is Biggsville in?

Biggsville and the 61418 zip code are in Henderson 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 Biggsville?

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

Radon mitigation in Biggsville 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 Biggsville?

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.