Biohazard & Trauma Cleanup in Illinois
57 certified biohazard cleanup 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)
Marion, Waukegan, Gilberts, Algonquin, Bedford Park, Bloomington, Bolingbrook, Buffalo Grove, Cary, Alsip, Arlington Heights, Aurora, Downers Grove, Decatur, Colona, Elk Grove Village, Fairview Heights, Frankfort, Grayslake, Effingham, Joliet, Lake Zurich, Lombard, Lockport, Loves Park, Mackinaw, Manteno, Elgin, Morton, Mundelein, Niles, Naperville, Pekin, Quincy, Rockford, Oswego, Roselle, Schaumburg, Urbana, St. Charles
What Illinois biohazard cleanup firms are certified in
Certification counts across the 57 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 |
|---|---|---|
| TCST | Trauma and Crime Scene Technician | 57 |
| WRT | Water Damage Restoration Technician | 53 |
| FSRT | Fire and Smoke Damage Restoration Technician | 49 |
| AMRT | Applied Microbial Remediation Technician | 45 |
| ASD | Applied Structural Drying Technician | 40 |
| OCT | Odor Control Technician | 40 |
51 of these firms hold three or more certifications; 4 appear in two independent registries and carry a cross-verified marker; 28 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 →
Biohazard Cleanup in Illinois: common questions
Is biohazard cleanup work licensed in Illinois?
No US state licenses biohazard cleanup 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 biohazard cleanup firms actually hold?
Across the 57 Illinois firms on file for this work, the most common credentials are TCST (Trauma and Crime Scene Technician) held by 57 firms, WRT (Water Damage Restoration Technician) held by 53 firms, FSRT (Fire and Smoke Damage Restoration Technician) held by 49 firms, AMRT (Applied Microbial Remediation Technician) held by 45 firms. 51 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. 4 of the 57 appear in two independent registries and carry a cross-verified marker. Checked August 14, 2026.
Which Illinois cities have the most biohazard cleanup firms?
Chicago leads with 7, followed by Addison (3). We build a page wherever a city has three or more certified firms; smaller markets are listed below that without their own page.