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Who is qualified to test for smoke in California
In California, as everywhere in the United States, the testing and the cleaning are separate disciplines. Certified Industrial Hygienists (CIHs) and environmental consultants design the sampling plan, collect surface and air samples, interpret the laboratory data against background and write the clearance letter. Fire damage restoration technicians and disaster restoration specialists execute the protocol: dry-sponge and wet cleaning of soot, HEPA vacuuming, air scrubbing, thermal fogging for residual odor, and structural drying of firefighting water.
California does not issue a “smoke tester” licence, and neither does any other state; the qualification is the credential and the method. A Certified Industrial Hygienist holds a board certification in exposure science; an environmental consultant may hold the same or a related credential. What both produce is a sampling plan, chain-of-custody documentation, accredited laboratory analysis and a written interpretation — the package United Policyholders [1] tells wildfire survivors to insist on, and the package a CIH-led fire and smoke assessment [2] is built around.
What gets sampled in a California property
- Surfaces — tape lifts and wipe samples from horizontal surfaces, inside cabinets and closets, on the attic insulation; microscopy identifies char, soot and ash and distinguishes them from the ordinary dust of a California house.
- Air — volatile organic compounds by canister or sorbent tube where odor persists in the California property; particulate where occupancy is the question.
- HVAC — the filter that ran during the event, the return plenum, a supply register; the ANSI/IICRC S590 [3] standard governs the inspection of the system after a California fire.
- Background — outdoor and unaffected-reference samples, essential after a regional California smoke event so that interior results are read against the local baseline.
- Clearance — the same locations after remediation; the letter that says the California property is back to background.
The restoration itself is governed by ANSI/IICRC S700 [4], which describes the assessment, the work plan and the verification of fire and smoke damage restoration; the IICRC’s own scope note says the standard addresses fires other than wildfires, and there is no published S760, so a California wildfire-intrusion protocol is written by the hygienist from S700’s principles rather than read out of a wildfire standard (our page on testing before you clean after wildfire smoke walks through that protocol). See our pages on particle testing and fire VOC testing for the laboratory methods.
What a California insurer accepts
The California Department of Insurance does not certify testing firms, but its claims rules decide how fast a California carrier must answer the report you give it. Under California's Fair Claims Settlement Practices Regulations (10 CCR 2695.5 and 2695.7), an insurer must acknowledge a claim within 15 calendar days, accept or deny it in writing within 40 calendar days of receiving proof of claim, send a written status notice every 30 days if it needs more time, and pay within 30 days of accepting a claim. [5] CDI's Residential Series Guides page collects nine consumer guides for homeowners and renters, including the Residential Property Claims Guide, a home inventory guide, disaster-scam prevention and earthquake claims mediation, alongside the residential insurer contact list and homeowners complaint-data studies. [6]
In practice a California adjuster accepts a report that shows a defensible sampling design (affected, unaffected and outdoor locations), accredited laboratory analysis with detection limits, a named and credentialed author, and a conclusion that ties the findings to a remediation scope. A report missing any of those is where the “just dust” argument lives. Our guide to reading a laboratory report shows what each of those looks like on paper.
How California regulates the trades involved
Testing, cleaning and the hazardous-material work that fire damage often exposes are regulated differently in California. CSLB requires a current contractor license for any job that needs a building permit, uses employee labor, or is valued at $1,000 or more for combined labor and materials. [7] AB 2622 raised California's unlicensed-work threshold from $500 to $1,000 effective January 1, 2025, but only when no workers are hired and no permit is needed; CSLB warns down payments should not exceed 10 percent and that unlicensed contracting carries administrative fines up to $15,000 and up to six months in jail. [8] Cal/OSHA requires contractors removing 100 square feet or more of material with more than 0.1 percent asbestos to register under Labor Code 6501.5–6510, and anyone sampling or overseeing asbestos projects of 100 square feet or more must be a Certified Asbestos Consultant or Site Surveillance Technician under 8 CCR 341.15. [9] CDPH's mold page explains that the 2001 Toxic Mold Protection Act asked the department to set health-based exposure limits for indoor mold, that CDPH concluded in 2005 the evidence did not support such limits (still its position), and that since January 1, 2016 visible mold has been a condition making a California home substandard; the CDPH group does not do inspections or enforcement. [10] CDPH's Childhood Lead Poisoning Prevention Branch certifies individuals to perform lead-related construction work in California and accredits their training providers; since July 1, 2020 each certificate or renewal costs $135 and each state certification exam $70. [11]
The California lookup is Contractors State License Board [12]; check the restoration contractor there, and ask the hygienist for the certification number on their report.
The California context: what the testing is up against
CAL FIRE's 2020 archive records 8,648 wildfires, 4,304,379 acres burned, 33 fatalities and 11,116 structures destroyed, the largest season in California's modern record; the August Complex alone burned 1,032,648 acres across seven counties and was called the first "gigafire." [13] A CARB analysis released July 12, 2021 found lead in Chico's air reached 50 times the site's average on November 10, 2018 during the Camp Fire, with elevated lead, zinc, calcium, iron and manganese detected more than 150 miles away in Sacramento, San Jose and Modesto, and peak PM2.5 across much of California more than 300 percent above 2010–2017 averages for November 8–22. [14] USFA's 2023 NFIRS profile for California shows 3.5 deaths and 14.5 injuries per 1,000 residential structure fires, below the national averages of 5.8 deaths and 19.7 injuries, based on data reported by 562 California fire departments. [15] After a regional event in California, background matters more than anywhere: every house downwind has some residue, and the report has to show that yours has more than the baseline and that it came from the fire in question. That is a sampling-design problem, and it is solved on the first visit or not at all.
The roof is outside the hygienist’s scope. Heat, embers and ventilation cuts are inspected by a roofer or an engineer; smoke odor in decking and attic insulation [16] explains why the attic is sampled and the deck is inspected by different people. The picker below opens the California roofing directory.