Los Angeles is a wildfire city now. The 2025 Palisades and Eaton fires taught every Angeleno something their grandparents didn't have to know: smoke damage can reach homes twenty miles from the burn line, and most of us have no idea how to clean it properly.
This guide is what we wish we'd had in January 2025. It covers what happens to your home during a smoke event, the health risks of getting cleaning wrong, what you can do yourself, when to call a professional remediation team, and how to navigate the insurance claim.
We're a cleaning company, not a remediation firm. We coordinate with IICRC-certified partners for heavy smoke work. Where we make recommendations about pro services below, we're telling you what we tell our own clients.
What wildfire smoke actually is
Wildfire smoke looks like fog but behaves like chemistry. When structures and vegetation burn, they release a complex mixture of solid particles, liquid droplets, and gaseous compounds. Understanding what's in it is the key to knowing how to clean it.
| Component | Size / form | Why it matters |
|---|---|---|
| PM2.5 particulates | Under 2.5 microns | Penetrates walls, fabrics, lungs; dominant odor source |
| PM10 particulates | Under 10 microns | Visible ash and soot; settles on surfaces |
| Carbon monoxide | Gas | Dissipates with ventilation, not cleaning |
| VOCs (benzene, formaldehyde, acrolein) | Gas | Absorbed by drywall, fabric; off-gasses for months |
| PAHs | Semi-volatile | Carcinogenic; cling to soot particles |
| Heavy metals (when structures burn) | Particulate | Lead, arsenic, mercury; require wet cleaning |
| Asbestos (older structures) | Fiber | Hazardous; requires specialized remediation |
That last row matters more than most Angelenos realize. When pre-1978 houses burn in the wildland-urban interface, the smoke plume carries lead from old paint and asbestos from vintage insulation. The 2025 Palisades fire deposited measurable asbestos and lead on surfaces up to 18 miles from the burn area, according to Caltech and LA County Public Health joint sampling.
The health risks of getting this wrong
PM2.5 is small enough to cross the lung-blood barrier. The EPA classifies sustained exposure as a cause of cardiovascular disease, respiratory disease, and certain cancers. Acute post-fire exposure — the kind that happens during cleanup — can trigger asthma attacks, chronic cough, and in older adults, measurable cardiac events.
- Children under 12: highest vulnerability, keep out of active cleaning areas
- Pregnant women: PM2.5 crosses placental barrier; medical-grade protection required
- Older adults: cardiac and respiratory risk elevated
- Anyone with asthma or COPD: cleaning triggers documented flare-ups
- Pets: low-to-the-ground exposure is concentrated; bathe before bringing back
- Healthy adults: still require N95 minimum during any cleanup
The PPE floor
Minimum protection for any post-wildfire cleaning:
- N95 respirator, not a surgical or cloth mask
- Nitrile gloves, not cotton
- Long sleeves and pants
- Safety glasses or goggles
- Shoes that stay at the door
- Post-cleaning: shower and launder immediately
For heavy cleaning, upgrade to a P100 respirator and a disposable Tyvek suit. The cost of that PPE is under $50. The cost of sending yourself to urgent care with asthma symptoms is considerably more.
Assessing the damage level
Not all smoke exposure is equal. Before you start cleaning, categorize what you're dealing with. The right response depends entirely on the exposure level.
| Level | Signs | Typical response |
|---|---|---|
| Light | Faint smell 1-3 days, no visible soot inside, some outdoor ash | DIY clean, HVAC filter swap, standard deep clean |
| Moderate | Smell persists 7+ days, visible dust film on light surfaces, some staining on window screens | Professional deep clean with HEPA + HVAC service |
| Heavy | Visible soot on walls and ceilings, strong odor, yellow staining on curtains | Professional remediation with ozone/hydroxyl treatment |
| Severe | Char marks, melted vinyl, brown/black residue streaks, odor causing nausea | Full remediation + likely drywall and insulation replacement |
The 5-test assessment
Run these five tests on any post-fire home before deciding DIY vs. pro:
- The white cloth test. Wipe a clean white microfiber across an interior wall. Gray = light. Yellow or brown = moderate. Black = heavy.
- The filter check. Pull your HVAC filter. A light gray filter means ambient dust. A yellow or black filter means active smoke infiltration.
- The window track test.Window tracks collect settled ash. If you can scrape residue with your fingernail, it's moderate+. If the residue is tar-like, it's heavy.
- The pillow test. Smell a pillow that has been in the home during the event. If it smells smoky, soft materials throughout the home need treatment or replacement.
- The 72-hour test. Ventilate fully for 72 hours. If the smell returns when you close the windows, VOCs are embedded in drywall — professional treatment required.
DIY vs. professional remediation
DIY can handle light exposures. For anything moderate or above, the DIY route will fail and you'll pay for a pro anyway — plus the time you wasted and the PM2.5 you inhaled.
| Situation | DIY OK? | Why |
|---|---|---|
| Home sealed during event, faint lingering smell | Yes | Surface cleaning will resolve |
| Outdoor ash only, no interior residue | Yes | Exterior wash, filter swap, done |
| Visible interior dust film on most surfaces | No | HVAC compromise almost certain |
| Smell lingers past 2 weeks | No | VOCs embedded; requires ozone |
| Yellow tinge on walls or curtains | No | Tar-based residues; specialized cleaning |
| Structures burned within 3 miles | No | Potential lead/asbestos; professional testing required |
| HVAC ran during event | No | Duct system almost certainly contaminated |
| Insurance claim planned | No | Need certified documentation |
Need an assessment for your home?
We coordinate free post-fire assessments across LA County with IICRC-certified remediation partners. No obligation, no upsell — just an honest read of what your home needs.
HVAC and indoor air quality
The HVAC system is the single biggest determinant of whether smoke stays in your home or leaves it. Miss this step and no amount of surface cleaning will solve the odor.
Immediate HVAC response after any smoke event
- Shut off HVAC if smoke is outside; open windows to vent only after air quality improves
- Replace main filter with MERV 13+ once event clears
- Run only with filter in place; never operate with filter removed
- Plan a full duct cleaning if smoke entered the home
- Replace filter again 30 days after first replacement
When duct cleaning is worth it
Duct cleaning is oversold for normal situations and under- sold for post-fire situations. If any of the following are true, get the ducts cleaned:
- HVAC ran at any point during the smoke event
- Air returns show visible discoloration
- Smell comes back when HVAC kicks on even after surface cleaning
- Home has been smoke-damaged in any prior wildfire event without duct service
Typical LA post-fire duct cleaning runs $450-$950. Compared to ongoing odor and PM2.5 recirculation, it's cheap.
Air purifiers
A true HEPA portable air cleaner (not a "HEPA- type") sized to the room can meaningfully reduce PM2.5 during and after an event. Rule of thumb: match the cleaner's CADR rating to roughly two-thirds of the room square footage. Budget $300-$700 per large room. Run 24/7 for the first 30 days post-event.
Carpets, upholstery, and fabrics
Soft surfaces are the hardest part of smoke cleaning because they act as giant filters, trapping particles and VOCs deep in fiber cores.
Carpets
Light exposure: HEPA vacuum pass-over followed by professional hot-water extraction. Budget $0.30-$0.55 per square foot.
Moderate to heavy exposure: extraction alone is not enough. Add an enzymatic pre-treatment, followed by extraction, followed by ozone exposure to the whole room. Some heavily-exposed carpets cannot be saved and should be replaced — the carpet padding underneath holds VOCs that will off-gas for years.
Upholstery
Cushion covers that come off: launder with fragrance-free detergent + 1 cup of white vinegar per load. Non-removable upholstery: professional hot-water extraction or ozone treatment. Leather: wipe with a slightly damp microfiber, followed by leather conditioner. Velvet, silk, and other delicates: dry cleaning only.
Bedding and clothing
The playbook that works for most smoke-exposed textiles:
- Shake off visible ash outdoors (wearing N95 and gloves)
- Wash with hot water + fragrance-free detergent
- Second cycle with 1 cup of white vinegar, no detergent
- Air dry outside if AQI permits, else low dryer
- If smell remains, repeat with baking soda pre-soak overnight
Down comforters and pillows are especially tough. Down absorbs VOCs. Expect to replace heavily-exposed down products rather than save them.
Mattresses
Mattresses cannot be laundered. Light exposure: vacuum, baking soda treatment, sunlight. Moderate to heavy exposure: replacement is almost always required. The foam core holds odor molecules indefinitely.
Hard surfaces: walls, ceilings, floors
Hard surfaces are the easiest part — in theory. In practice, most DIY cleanings make things worse because of wrong technique.
The dry-sponge step (do first)
A dry chemical sponge (often called a "soot sponge") is a yellow rubber sponge specifically engineered to lift soot off painted surfaces without smearing it in. Start with dry-sponging every wall and ceiling. Do not wet-clean first — water turns soot into a paste that bonds into paint.
Then, wet cleaning
After dry-sponging, wipe with a mild alkaline cleaner (trisodium phosphate alternatives like Simple Green Pro HD). Rinse with clean water. Work top-down. Replace rinse water constantly — clean water is non-negotiable.
Ceilings
Ceilings catch more smoke than walls because smoke rises. They're also the most commonly skipped step in DIY cleaning. Textured ceilings (popcorn, knockdown) are especially problematic and may require light sanding and repainting rather than cleaning.
Wood floors
HEPA vacuum first. Then damp-mop with a wood-safe cleaner (Method, Murphy's Oil Soap for non-polyurethane finishes). Avoid excess water. For heavy smoke, wood floors may need refinishing.
Removing lingering odor (the real challenge)
You've cleaned everything. The house still smells. This is where remediation moves from cleaning to chemistry.
Ozone treatment
Ozone generators produce O3 gas, which chemically breaks down odor-causing VOCs by oxidation. Effective, but dangerous: ozone is harmful to breathe, harmful to plants, and degrades rubber seals and some plastics. Treatment requires vacating the home for 24-48 hours during and after application. Professional service only; DIY units rarely produce clinical-grade ozone levels.
Typical LA ozone treatment: $1,500-$4,500 per home.
Hydroxyl treatment
Hydroxyl generators produce hydroxyl radicals that neutralize odors similarly to ozone but are safe to occupants and pets during treatment. Slower than ozone (48-72 hours of continuous operation) but allows normal occupancy. Increasingly the preferred approach for occupied homes.
Thermal fogging
Thermal foggers vaporize a deodorizing solution that penetrates into porous materials the same way the original smoke did. Reserved for moderate-to-heavy exposure; requires specialized equipment and certified technicians. Costs $800-$2,500 per treatment.
The insurance claim
California homeowner's policies typically cover smoke damage from named wildfire events. The claim process is bureaucratic but winnable with good documentation.
Document immediately
- Photos of ash on exterior surfaces with timestamps
- Photos of visible interior residue, room by room
- Photos of HVAC filter before and after removal
- Photo of any AQI alerts specific to your zip code
- Journal of odor intensity daily for 2 weeks
- Save all receipts: filters, air purifiers, cleaning supplies
- Get two written remediation estimates from certified firms
Filing checklist
- File within 30 days of the named fire event start
- Request a Cause of Loss determination in writing
- Ask for an ALE (Additional Living Expense) advance if you can't safely occupy
- Get claim number in writing; document every adjuster call
- Do not accept the first settlement offer; reasonable counter is common
- Use California Department of Insurance complaint process if stalled
Preparing for next time
LA homeowners who've been through a smoke event once treat it like earthquake prep now. Here's the minimum kit.
- One MERV 13 or higher HVAC filter stored on hand
- Supply of painter's tape and plastic sheeting for sealing windows
- HEPA portable air cleaner sized to your primary living area
- Box of N95 respirators, adult and child sizes
- Two weeks of nitrile gloves
- Weather-sealed go-bag with medications, documents, 72hrs supplies
- Pre-identified place to stay outside the basin during events
- AirNow app installed with alerts for your zip code
- Home inventory photos stored in cloud (helps claims later)
Frequently Asked Questions
Frequently Asked Questions
Can I clean wildfire smoke residue myself, or do I need a pro?
Light smoke exposure (an odor lingering for a few days, visible ash on outdoor surfaces only) can usually be handled with careful DIY: HEPA vacuuming, dry-sponge wall cleaning, fabric laundering, and HVAC filter replacement. Heavy exposure — visible soot on interior walls, burnt smell persisting after 2 weeks, char marks — requires professional remediation. The line in between is tricky; when in doubt, get a free inspection before attempting DIY.
How much does professional smoke damage cleaning cost in LA?
Light smoke cleaning (deep clean plus HVAC, fabrics, and air scrubbing) runs $1,200-$3,800 for a 2,000 sq ft home. Heavy remediation (ozone treatment, thermal fogging, structural cleaning) runs $6,000-$18,000+. Full restoration including drywall and insulation replacement can exceed $40,000. Insurance typically covers both when triggered by a named wildfire event.
What is PM2.5 and why does it matter for cleaning?
PM2.5 refers to particulate matter smaller than 2.5 micrometers — 30 times thinner than human hair. Wildfire smoke is predominantly PM2.5. These particles penetrate drywall, fabrics, and HVAC systems, and they keep off-gassing odor molecules for months. Standard cleaning removes surface residue but doesn't touch embedded particles. That's why ozone, hydroxyl, or thermal fogging treatments exist.
Does homeowner's insurance cover wildfire smoke cleaning?
Yes, under most California homeowner's policies, when the smoke exposure is tied to a named wildfire event and your property is within a specified distance of the fire. Document everything: ash photos, odor journals, air quality readings. File the claim promptly, request an official Cause of Loss statement, and get at least two remediation estimates. Coverage disputes are common for properties more than 15 miles from the named fire.
Do I need to replace my HVAC filters after a wildfire?
Always. Even brief wildfire smoke exposure saturates HVAC filters with PM2.5 and VOCs. Replace the main filter immediately, then again 30 days later. If smoke was heavy, have the full duct system professionally cleaned — smoke residue inside ducts will continue to off-gas into your home for months even after surfaces are cleaned.
Will the smoke smell go away on its own?
Partially, over 3-6 months in a lightly exposed home if you maintain good ventilation and change filters. Heavier exposures never fully go away without professional treatment because VOCs get absorbed into drywall, insulation, and soft furnishings. Ozone and hydroxyl treatments chemically break down the odor molecules rather than masking them.
Is wildfire ash dangerous to touch or inhale?
Yes. Wildfire ash in California frequently contains asbestos (from old construction), lead (from pre-1978 paint), arsenic, heavy metals, and dioxins — especially when structures burned nearby. Treat all post-fire ash as hazardous: N95 minimum when cleaning, gloves always, no dry sweeping (which aerosolizes particles), and wet-wipe methods for any surface you can wipe.
What about my clothes and fabrics?
All washable fabrics: launder on hot with an odor-targeting detergent (Tide with Febreze or similar), then a second cycle with a cup of white vinegar. Non-washable fabrics (suits, curtains, upholstery): professional ozone treatment or dry cleaning. Mattresses, pillows, and heavy upholstery that sat in heavy smoke often cannot be saved — budget for replacement.
How long does post-wildfire cleaning take?
Light exposure with DIY: 2-3 full days. Professional light remediation: 2-4 days. Heavy remediation with ozone and thermal fogging: 5-10 days including treatment and airing-out. Full restoration involving drywall or insulation replacement: 3-8 weeks. Temporary relocation during ozone treatment is required (the gas is harmful to breathe).
Should I stay out of my home during cleaning?
During ozone and thermal fogging treatments: absolutely yes, for 24-48 hours minimum, with sensitive individuals out for a full week. During standard HEPA and wet-wipe cleaning: you can be home but limit exposure to active cleaning zones, especially children, elderly, pregnant women, and anyone with respiratory conditions.
The short version
Assess exposure level before you start. PPE is not optional. Never dry-sweep ash. Address HVAC first. Dry-sponge hard surfaces before wet cleaning. Launder all fabrics twice, once with vinegar. Consider replacement for mattresses and down products in moderate+ exposures. Document everything for insurance. For anything beyond light exposure, hire IICRC- certified remediation. Prepare now for next season — LA is a fire city now and every homeowner needs a kit.