Listed for: Testing
Verified:Illinois state license
Call Preferred Property Inspection Services, Inc. at (630) 636-9676No website listed
ProfessionalsBusiness profile
Guardian Radon Mitigation
Oswego, Illinois. Mitigation
4 Illinois state licenses verified against the Illinois Emergency Management Agency (IEMA) list, last checked November 11, 2026.
Credentials
Licenses and certifications
4 credentials are on file for this business, each exactly as the issuer's list printed it.
Illinois state licenses (4)
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.
| License | Number | Status on the list | Verified | Check with the issuer |
|---|---|---|---|---|
| Mitigation license | No. RNM2008209 | Mitigation Professional | Verified November 11, 2026 | Verify RNM2008209 with the Illinois Emergency Management Agency (IEMA) (opens in a new tab) |
| Mitigation license | No. RNM2022208 | Mitigation Professional | Verified November 11, 2026 | Verify RNM2022208 with the Illinois Emergency Management Agency (IEMA) (opens in a new tab) |
| Mitigation license | No. RNMT2017203 | Mitigation Technician | Verified November 11, 2026 | Verify RNMT2017203 with the Illinois Emergency Management Agency (IEMA) (opens in a new tab) |
| Mitigation license | No. RNMT2019206 | Mitigation Technician | Verified November 11, 2026 | Verify RNMT2019206 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 Oswego
Oswego lies partly in Kendall County, where 35.0% of 3,045 radon tests reported to CDC (2017) were at or above 4 pCi/L, 1.3 points above Illinois pooled (33.7%), 50th of 70 Illinois counties with 30 or more tests.
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 Oswego
Around Kendall County, one of the counties Oswego lies in, the nearest Illinois counties with a CDC figure for 2017 run from 19.4% to 45.8% of tests at or above 4 pCi/L; the closest, Grundy County, is 21 miles away at 32.3%.
Nearby
Radon professionals nearest Oswego
Listed for: Testing
Verified:Illinois state license
Call MJS Inspections, Inc at (847) 417-3227No website listedListed for: Testing
Verified:Illinois state license
Call Reliable Radon Inspections, Inc at (877) 997-2366No website listed- View profile for Discover LLC
Discover LLC
Plainfield, IL
Listed for: Testing
Verified:Illinois state license
Call Discover LLC at (866) 750-3456No website listed Listed for: Testing
Verified:Illinois state license
Call Duffield Consulting Engineers, Ltd. at (815) 693-9871No website listedListed for: Testing
Verified:Illinois state license
No phone or website on the list. Licenses on the profile.
More radon professionals in OswegoMore radon professionals in Illinois
Is this your business?
Get FeaturedA fuller profile and first place in your area's Featured band.
Featured adds a long description, services, service areas and a badge for your own site, and puts the business first in the labelled Featured band on the pages for the areas it serves.
Get Featured