Lyndon, IL Radon Levels

Q: What EPA Radon Zone is Lyndon in?

Lyndon is in Whiteside County, EPA Zone 1.

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

No homeowner radon tests have been submitted for Lyndon yet, so readings from the closest cities and the Whiteside 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 Lyndon?

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

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

Lyndon, IL Radon Facts

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

County Whiteside County, IL

Zip Code 61261

Small-town Whiteside County in northwestern Illinois features glacial till deposits over sedimentary bedrock that can facilitate radon accumulation in homes. While specific testing data for ZIP code 61261 remains limited, the area's geological composition suggests moderate radon potential similar to other communities in the Illinois-Iowa border region. Local homeowners should prioritize radon testing, especially in properties with basements common to this part of Illinois.

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 Lyndon 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+

Lyndon, 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 Lyndon?

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 Lyndon, IL

No homeowner tests have been submitted for Lyndon 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	12.0 mi	6.00 pCi/L	2
Fulton	15.1 mi	4.00 pCi/L	1
Walnut	20.2 mi	5.00 pCi/L	1
Geneseo	21.8 mi	6.00 pCi/L	1
Annawan	22.2 mi	10.00 pCi/L	1
Dixon	23.7 mi	14.00 pCi/L	2
Lanark	26.2 mi	12.00 pCi/L	3
Amboy	29.4 mi	5.00 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 Lyndon, IL

What EPA Radon Zone is Lyndon in?

Lyndon and the 61261 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 Lyndon?

No homeowner radon tests have been submitted for Lyndon 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 Lyndon 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 Lyndon?

Radon mitigation in Lyndon 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 Lyndon?

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.