Sterling, IL Radon Levels

Q: What EPA Radon Zone is Sterling in?

Sterling is in Whiteside County, EPA Zone 1.

Q: How much does radon mitigation cost in Sterling?

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

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

Sterling, IL Radon Facts

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

County Whiteside County, IL

Zip Code 61081

Northwestern Illinois's Sterling sits in Whiteside County along the Rock River, where glacial deposits overlay Ordovician limestone bedrock typical of the region. Testing data for zip code 61081 is currently unavailable, but the geological combination creates moderate radon potential. Homeowners should prioritize professional testing to establish baseline readings in this river valley setting.

5.33

pCi/L area average

Above EPA Action Level

Whiteside County average: 5.33 pCi/L, based on 3 user-submitted tests across 2 cities in the county. No homeowner readings have been submitted for Sterling 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+

Sterling, 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 Sterling?

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

1-800-299-3578 Toll-free · Mon–Fri 8am–6pm ET

Radon Readings Near Sterling, IL

No homeowner tests have been submitted for Sterling 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
Rock Falls	2.8 mi	6.00 pCi/L	2
Dixon	11.5 mi	14.00 pCi/L	2
Walnut	19.0 mi	5.00 pCi/L	1
Amboy	19.7 mi	5.00 pCi/L	1
Lanark	20.8 mi	12.00 pCi/L	3
Mount Morris	21.8 mi	4.00 pCi/L	1
Fulton	23.2 mi	4.00 pCi/L	1
Ashton	25.9 mi	4.00 pCi/L	1

Whiteside County Radon Profile

The bedrock and soils beneath Whiteside County are classified by the EPA as Radon Zone 1, the highest-risk tier, with predicted average indoor screening levels above 4 pCi/L. Homeowner-submitted tests from 2 cities in Whiteside County average 5.33 pCi/L across 3 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Radon is the second leading cause of lung cancer in the United States, and a short-term test is the only way to confirm a specific home's level in Whiteside County.

Radon FAQ for Sterling, IL

What EPA Radon Zone is Sterling in?

Sterling and the 61081 zip code are in Whiteside 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 Sterling?

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

Radon mitigation in Sterling 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 Sterling?

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.