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Gill Group

Dexter, Missouri. Testing

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

2 Iowa state licenses verified against the Iowa Department of Health and Human Services, Bureau of Radiological Health list, last checked November 3, 2026.

3 Kansas state licenses verified against the Kansas Department of Health and Environment, Kansas Radon Program list, last checked October 4, 2026.

2 Minnesota state licenses verified against the Minnesota Department of Health list, last checked November 3, 2026.

1 Ohio state license verified against the Ohio Department of Health, Radon Education and Licensing Program list, last checked November 3, 2026.

Call Gill Group at (800) 428-3320Visit website of Gill Group (opens in a new tab)

Credentials

Licenses and certifications

9 credentials are on file for this business, each exactly as the issuer's list printed it.

These licenses are from Iowa and Illinois and Kansas and Minnesota and Ohio, and the business address is in Missouri.

Radon411 has no Missouri record for this business. Before hiring it for a home in Missouri, check what Missouri asks for. What Missouri requires

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
Testing licenseNo. RNI20253193Measurement ProfessionalVerified November 11, 2026Verify RNI20253193 with the Illinois Emergency Management Agency (IEMA) (opens in a new tab)

Iowa state licenses (2)

Issued by the Iowa Department of Health and Human Services, Bureau of Radiological Health, not by NRPP or NRSB. Radon411 last checked the list on November 3, 2026. No expiry date is on the record.

LicenseNumberStatus on the listVerifiedCheck with the issuer
Testing licenseNo. RNTST10251Certified Radon Measurement SpecialistVerified November 3, 2026Verify RNTST10251 with the Iowa Department of Health and Human Services, Bureau of Radiological Health (opens in a new tab)
Testing licenseNo. RNTST10253Certified Radon Measurement SpecialistVerified November 3, 2026Verify RNTST10253 with the Iowa Department of Health and Human Services, Bureau of Radiological Health (opens in a new tab)

Kansas state licenses (3)

Issued by the Kansas Department of Health and Environment, Kansas Radon Program, not by NRPP or NRSB. Radon411 last checked the list on October 4, 2026. No expiry date is on the record.

LicenseNumberStatus on the listVerifiedCheck with the issuer
Testing licenseNo. KS-MS-0621Kansas certified radon measurement technicianVerified October 4, 2026Verify KS-MS-0621 with the Kansas Department of Health and Environment, Kansas Radon Program (opens in a new tab)
Testing licenseNo. KS-MS-0710Kansas certified radon measurement technicianVerified October 4, 2026Verify KS-MS-0710 with the Kansas Department of Health and Environment, Kansas Radon Program (opens in a new tab)
Testing licenseNo. KS-MS-0711Kansas certified radon measurement technicianVerified October 4, 2026Verify KS-MS-0711 with the Kansas Department of Health and Environment, Kansas Radon Program (opens in a new tab)

Minnesota state licenses (2)

Issued by the Minnesota Department of Health, not by NRPP or NRSB. Radon411 last checked the list on November 3, 2026. No expiry date is on the record.

LicenseNumberStatus on the listVerifiedCheck with the issuer
Testing licenseNo. RMEA-00553Minnesota radon measurement licenseVerified November 3, 2026Verify RMEA-00553 with the Minnesota Department of Health (opens in a new tab)
Testing licenseNo. RMEA-00630Minnesota radon measurement licenseVerified November 3, 2026Verify RMEA-00630 with the Minnesota Department of Health (opens in a new tab)

Ohio state license (1)

Issued by the Ohio Department of Health, Radon Education and Licensing Program, not by NRPP or NRSB. Radon411 last checked the list on November 3, 2026.

LicenseNumberStatus on the listExpiresVerifiedCheck with the issuer
Testing licenseNo. RT2157Ohio licensed radon testerExpires April 30, 2028Verified November 3, 2026Verify RT2157 with the Ohio Department of Health, Radon Education and Licensing Program (opens in a new tab)

Licensing in Missouri

Ask Missouri Radon Program what it requires before you hire.

Missouri Radon Program, Missouri Department of Health and Senior Services, 573-751-6102.

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

Radon figures

Radon in Missouri

CDC publishes radon testing by county, and Dexter is not a place its county figures resolve to, so the figures here are Missouri's: pooled across 115 counties, 30.6% of the 58,525 radon tests reported to CDC, 2008 to 2017, laboratory, were at or above 4 pCi/L; 72 counties have 30 or more tests for that period.

Missouri's highest and lowest counties by share of tests at or above 4 pCi/L, 2008 to 2017, laboratory
CountyTestsAt or above 4 pCi/L
Atchison County10369.9%
Andrew County15860.8%
Buchanan County57552.9%
Vernon County348.8%
Polk County7811.5%
Montgomery County4712.8%

Missouri radon levels by county

Nearby

Radon professionals nearest Dexter

More radon professionals in DexterMore radon professionals in Missouri

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