Mold Remediation & Assessment in Illinois
126 certified mold remediation firms on file in Illinois. 2 of them hold a mold licence issued by another state — worth knowing, but there is no Illinois licence to check. Credentials below are verified against IICRC's Certified Firm registry.
Cities with 3+ certified firms
Also served (1–2 firms)
Addison, Arlington Heights, Elgin, Downers Grove, East Dundee, Champaign, Buffalo Grove, Skokie, Wood Dale, Tinley Park, Wilmington, Quincy, Gilberts, Frankfort, Elk Grove Village, Lombard, St. Charles, Peoria, Naperville, Rolling Meadows, Algonquin, Barrington, Arlington Hts, Batavia, Bartlett, Columbia, East Peoria, Fairview Heights, Freeport, Grayslake, Decatur, Effingham, Cary, Carol Stream, Colona, Caseyville, Broadview, Blue Island, Bedford Park, Manteno
What Illinois mold remediation firms are certified in
Certification counts across the 126 Illinois firms on file for this work. These are the credentials on record with the issuing body — not what the firms advertise.
| Credential | What it covers | Illinois firms |
|---|---|---|
| WRT | Water Damage Restoration Technician | 125 |
| AMRT | Applied Microbial Remediation Technician | 123 |
| FSRT | Fire and Smoke Damage Restoration Technician | 92 |
| ASD | Applied Structural Drying Technician | 91 |
| OCT | Odor Control Technician | 72 |
| CCT | Carpet Cleaning Technician | 54 |
118 of these firms hold three or more certifications; 9 appear in two independent registries and carry a cross-verified marker; 49 operate under a national franchise brand, which is separately owned and separately credentialled from the brand itself.
Every Illinois firm we hold a record for, A–Z by city →
Mold Remediation in Illinois: common questions
Is mold remediation licensed in Illinois?
Illinois does not run a mold-specific licensing program. Only five US jurisdictions do (Texas, Florida, New York, Louisiana and the District of Columbia; Illinois has enacted a program that is not yet in force). In Illinois, the credentials to check are IICRC certification, general contractor licensing where applicable, and insurance.
What certifications do Illinois mold remediation firms actually hold?
Across the 126 Illinois firms on file for this work, the most common credentials are WRT (Water Damage Restoration Technician) held by 125 firms, AMRT (Applied Microbial Remediation Technician) held by 123 firms, FSRT (Fire and Smoke Damage Restoration Technician) held by 92 firms, ASD (Applied Structural Drying Technician) held by 91 firms. 118 hold three or more certifications. Certification describes verified training rather than the services a firm chooses to advertise.
How were these Illinois firms verified?
Every certification was checked against IICRC's own Certified Firm registry, not against the firm's marketing. 9 of the 126 appear in two independent registries and carry a cross-verified marker. Checked August 14, 2026.
Which Illinois cities have the most mold remediation firms?
Chicago leads with 11, followed by Schaumburg (5), Plainfield (4), Alsip (3). We build a page wherever a city has three or more certified firms; smaller markets are listed below that without their own page.