Lacon, IL Radon Levels

Q: What EPA Radon Zone is Lacon in?

Lacon is in Marshall County, EPA Zone 1.

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

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

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

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

Lacon, IL Radon Facts

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

County Marshall County, IL

Zip Code 61540

Nestled in Marshall County along the Illinois River valley, Lacon sits where alluvial soils meet underlying Ordovician limestone formations that can create variable radon conditions. Testing data for this community remains limited, making individual home testing particularly important for residents. Most homes in the area feature traditional basement construction typical of mid-20th century development.

20.00

pCi/L area average

Above EPA Action Level

Marshall County average: 20.00 pCi/L, based on 1 user-submitted test across 1 city in the county. No homeowner readings have been submitted for Lacon 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+

Lacon, 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 Lacon, IL

No homeowner tests have been submitted for Lacon 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
20 pCi/L	Varna, IL	8.0 mi	21-50 Years	Full Basement	Mar 2017
6 pCi/L	Metamora, IL	16.5 mi	21-50 Years	Full Basement	Apr 2018
7 pCi/L	Dunlap, IL	17.5 mi	0-20 Years	Full Basement	Jun 2019
2 pCi/L	Spring Valley, IL	23.5 mi	51-99 Years	Full Basement	Mar 2025
8 pCi/L	Princeton, IL	23.6 mi	100+ Years	—	Sep 2025
15 pCi/L	Princeton, IL	23.6 mi	51-99 Years	Partial Basement	Jun 2019
5 pCi/L	Peoria, IL	24.6 mi	51-99 Years	Full Basement	Nov 2025
8 pCi/L	East Peoria, IL	25.3 mi	51-99 Years	Full Basement	Jan 2020

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

Marshall County Radon Profile

The bedrock and soils beneath Marshall 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 1 city in Marshall County average 20.00 pCi/L across 1 test — 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 Marshall County.

Radon FAQ for Lacon, IL

What EPA Radon Zone is Lacon in?

Lacon and the 61540 zip code are in Marshall 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 Lacon?

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

Radon mitigation in Lacon 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 Lacon?

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 Lacon, IL

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

City	Distance	Avg User Level	Submissions
Varna	8.0 mi	20.00 pCi/L	1
Metamora	16.5 mi	7.50 pCi/L	2
Dunlap	17.5 mi	7.00 pCi/L	1
Spring Valley	23.5 mi	2.00 pCi/L	1
Princeton	23.6 mi	11.50 pCi/L	2
Peoria	24.6 mi	5.00 pCi/L	1