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 October 4, 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 October 4, 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 October 4, 2026 | Verify RNM2008209 with the Illinois Emergency Management Agency (IEMA) (opens in a new tab) |
| Mitigation license | No. RNM2022208 | Mitigation Professional | Verified October 4, 2026 | Verify RNM2022208 with the Illinois Emergency Management Agency (IEMA) (opens in a new tab) |
| Mitigation license | No. RNMT2017203 | Mitigation Technician | Verified October 4, 2026 | Verify RNMT2017203 with the Illinois Emergency Management Agency (IEMA) (opens in a new tab) |
| Mitigation license | No. RNMT2019206 | Mitigation Technician | Verified October 4, 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.
The Agency also licenses and regulates the individuals who provide radon measurement and mitigation to the public.
IEMA-OHS Radon Program
Illinois Emergency Management Agency and Office of Homeland Security
Its page covers who may test and fix radon in the state and the disclosure rule for home sales.
Phone (800) 325-1245
Visit the program's page (opens in a new tab)Read October 3, 2026
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