Odor Removal in California
354 certified odor removal firms on file in California. Credentials below are verified against IICRC's Certified Firm registry.
Cities with 3+ certified firms
Also served (1–2 firms)
Antioch, Baldwin Park, Atascadero, Burlingame, Camarillo, Montclair, Glendora, El Cajon, Encino, Gardena, Downey, Corona, City Of Industry, Carson, Canoga Park, Yuba City, Santa Rosa, South San Francisco, Woodland Hills, Westlake Village, Vista, Roseville, San Francisco, Panorama City, Pleasant Hill, Lemon Grove, Norco, Mission Viejo, Loomis, Visalia, Ventura, Santa Clarita, Orange, Rancho Cordova, Oxnard, Orangevale, Oceanside, Ontario, Berkeley, American Canyon
What California odor removal firms are certified in
Certification counts across the 354 California 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 | California firms |
|---|---|---|
| OCT | Odor Control Technician | 354 |
| WRT | Water Damage Restoration Technician | 341 |
| FSRT | Fire and Smoke Damage Restoration Technician | 327 |
| AMRT | Applied Microbial Remediation Technician | 275 |
| ASD | Applied Structural Drying Technician | 249 |
| CCT | Carpet Cleaning Technician | 147 |
349 of these firms hold three or more certifications; 6 appear in two independent registries and carry a cross-verified marker; 103 operate under a national franchise brand, which is separately owned and separately credentialled from the brand itself.
Every California firm we hold a record for, A–Z by city →
Odor Removal in California: common questions
Is odor removal work licensed in California?
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 California odor removal firms actually hold?
Across the 354 California firms on file for this work, the most common credentials are OCT (Odor Control Technician) held by 354 firms, WRT (Water Damage Restoration Technician) held by 341 firms, FSRT (Fire and Smoke Damage Restoration Technician) held by 327 firms, AMRT (Applied Microbial Remediation Technician) held by 275 firms. 349 hold three or more certifications. Certification describes verified training rather than the services a firm chooses to advertise.
How were these California firms verified?
Every certification was checked against IICRC's own Certified Firm registry, not against the firm's marketing. 6 of the 354 appear in two independent registries and carry a cross-verified marker. Checked August 14, 2026.
Which California cities have the most odor removal firms?
San Diego leads with 16, followed by Riverside (14), Sacramento (12), Bakersfield (8). We build a page wherever a city has three or more certified firms; smaller markets are listed below that without their own page.