Odor Removal in Illinois
97 certified odor removal firms on file in Illinois. Credentials below are verified against IICRC's Certified Firm registry.
Cities with 3+ certified firms
Also served (1–2 firms)
Buffalo Grove, Downers Grove, Elgin, Elk Grove Village, Marion, Naperville, Mundelein, Streamwood, Wood Dale, Wilmington, Waukegan, Broadview, Blue Island, Bedford Park, Addison, Effingham, East Dundee, Decatur, Fairview Heights, Grayslake, Huntley, Joliet, Gilberts, Lake Forest, Lakemoor, Cicero, Cary, Colona, Belleville, Alsip, Bartlett, Midlothian, Manteno, Mackinaw, Loves Park, Lisle, Lockport, Morton, Mokena, O Fallon
What Illinois odor removal firms are certified in
Certification counts across the 97 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 |
|---|---|---|
| OCT | Odor Control Technician | 97 |
| WRT | Water Damage Restoration Technician | 93 |
| FSRT | Fire and Smoke Damage Restoration Technician | 82 |
| AMRT | Applied Microbial Remediation Technician | 71 |
| ASD | Applied Structural Drying Technician | 70 |
| CCT | Carpet Cleaning Technician | 53 |
94 of these firms hold three or more certifications; 6 appear in two independent registries and carry a cross-verified marker; 42 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 →
Odor Removal in Illinois: common questions
Is odor removal work licensed in Illinois?
No US state licenses odor removal work specifically. General contractor registration may apply to any rebuild that follows. The checkable credential is IICRC certification, which is what every listing on this page is verified against.
What certifications do Illinois odor removal firms actually hold?
Across the 97 Illinois firms on file for this work, the most common credentials are OCT (Odor Control Technician) held by 97 firms, WRT (Water Damage Restoration Technician) held by 93 firms, FSRT (Fire and Smoke Damage Restoration Technician) held by 82 firms, AMRT (Applied Microbial Remediation Technician) held by 71 firms. 94 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. 6 of the 97 appear in two independent registries and carry a cross-verified marker. Checked August 14, 2026.
Which Illinois cities have the most odor removal firms?
Chicago leads with 7, followed by Bloomington (4), Arlington Heights (3), Bolingbrook (3). We build a page wherever a city has three or more certified firms; smaller markets are listed below that without their own page.