9 certified biohazard cleanup firms serve Houston, Texas — 5 certified across the full water-mold-fire stack. Every certification below is verified against IICRC's registry.
Certifications verified against the IICRC Certified Firm registry. Last checked August 14, 2026. Ordering is by verified credentials only — never by payment.
Showing the 9 firms with a verified street address. Click a marker for the firm's name, credentials and phone number.
Sponsored placement — available Featured slots are labeled and never change the organic order below. Providers: learn more.
9 certified biohazard cleanup firms in Houston, TX
Ordered by verified credentials only — cross-verified firms first, then active state licences, then breadth of certification. Payment never affects this order.
How many certified biohazard cleanup companies are in Houston?
9 firms in Houston hold verifiable credentials for this work, of which 4 are cross-verified in two independent registries.
What should I do in the first 24 hours?
Stop the source if it's safe, photograph and video everything before touching it, keep damaged materials as evidence, and notify your insurer the same day. See our first-24-hours checklist for the full sequence.
How is this list ordered?
By verified credentials only: cross-verified firms first, then active state licences, then breadth of certification. Payment never affects order.
Housing here
1,023,112 housing units in Houston city, Texas, of which 48% were built before 1980. 58% of occupied homes are rented.
Why this is on the page: older housing has had longer to accumulate water events, and its plumbing and building envelope are closer to end of life — so age is a reasonable proxy for how often local firms meet older construction, not a statement about any individual property. It does not mean older homes have mold. With 58% of homes rented, a large share of water and mold problems here are a landlord repair duty before they are a contractor decision — see the Texas law page.
Source: US Census Bureau, American Community Survey 2023 5-year estimates — tables B25001 (housing units), B25034 (year structure built), B25003 (tenure). Retrieved August 14, 2026.