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618 Construction services LLC

Carterville, Illinois. Mitigation

1 Illinois state license verified against the Illinois Emergency Management Agency (IEMA) list, last checked November 11, 2026.

Call 618 Construction services LLC at (618) 438-1694

Credentials

Licenses and certifications

1 credential is on file for this business, exactly as the issuer's list printed it.

Illinois state license (1)

Issued by the Illinois Emergency Management Agency (IEMA), not by NRPP or NRSB. Radon411 last checked the list on November 11, 2026. No expiry date is on the record.

LicenseNumberStatus on the listVerifiedCheck with the issuer
Mitigation licenseNo. RNM20232140Mitigation ProfessionalVerified November 11, 2026Verify RNM20232140 with the Illinois Emergency Management Agency (IEMA) (opens in a new tab)

Licensing in Illinois

Illinois's radon program says the state licenses or certifies radon professionals.

IEMA-OHS Radon Program, Illinois Emergency Management Agency and Office of Homeland Security, (800) 325-1245.

What Illinois requires, in its program’s own words, and how to check a credential

Local radon figures

Radon in Carterville

Carterville lies in Williamson County, where 8.4% of 249 radon tests reported to CDC (2017) were at or above 4 pCi/L, 25.3 points below Illinois pooled (33.7%), 70th of 70 Illinois counties with 30 or more tests.

Radon test figures for the county Carterville lies in
CountyTestsAt or above 4 pCi/LMedianIllinois, pooledRank in the stateEPA zone
Williamson County2498.4%0.9 pCi/L33.7%70 of 70Zone 2

Shares of tests people chose to run and report, by county (2017); the state's is its counties' counts added up, calculated by Radon411. Only a test measures a home.

The counties around Carterville

Around Williamson County, where Carterville lies, the nearest Illinois counties with a CDC figure for 2017 run from 10.0% to 35.0% of tests at or above 4 pCi/L; the closest, Franklin County, is 18 miles away at 10.0%.

The nearest Illinois counties to Williamson County with 30 or more tests, 2017
CountyDistanceTestsAt or above 4 pCi/LMedian
Franklin County18 mi3010.0%1.9 pCi/L
Jackson County25 mi9625.0%2.5 pCi/L
Jefferson County39 mi13819.6%1.9 pCi/L
Washington County50 mi5111.8%2.0 pCi/L
Randolph County54 mi6035.0%2.9 pCi/L
Marion County63 mi4520.0%1.9 pCi/L

Nearby

Radon professionals nearest Carterville

More radon professionals in CartervilleMore radon professionals in Illinois

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