Hazardous Materials in Garages and Sheds

Paint, solvents, gasoline, pesticides, pool chemicals and old batteries in a garage or shed have two honest places to go: the county's household hazardous waste program, or nowhere at all, left where they sit for an as-is buyer to handle after closing. The one place they cannot go is the trash. CalRecycle states that it is illegal to dispose of hazardous waste in the garbage, down storm drains or onto the ground. Houses in Los Angeles County use the Public Works program, houses in San Bernardino County use the program run by San Bernardino County Fire, and nobody has to move a single can before the walkthrough.

This guide is part of the full-contents and hoarder houses guides. The pillar, selling a house full of belongings, has the whole list of things to find first. This one is about the shelf above the workbench.

What counts as household hazardous waste

San Bernardino County Fire defines household hazardous waste as any hazardous waste generated incidental to owning or maintaining a place of residence, and it notes that the term does not include business waste. Los Angeles County Public Works describes it as products labeled toxic, flammable, corrosive and similar. The label is the quickest test: if the can carries one of those words, it does not belong in a haul-off load or a curbside bin.

A garage or shed that has been used for decades usually holds some of these, all of which appear on the county lists of accepted items:

• Paint, paint thinner, stains and wood preservatives
• Motor oil, oil filters, antifreeze and gasoline in old cans
• Car batteries and household batteries
• Weed killers, pesticides and fertilizers
• Pool chemicals and hobby supplies
• Drain cleaners, polishes and household cleaners
• Fluorescent tubes, mercury thermostats and old electronics

Medications and used needles found inside the house go through the same county programs, with their own rules: San Bernardino County Fire takes sharps only in an approved sharps container, and not at every location.

What the county programs will not take

Both programs publish exclusions, and the two lists are not identical.

• Los Angeles County. At its temporary collection events, the county does not accept business waste, explosives, ammunition, marine flares, radioactive materials, controlled substances, trash and tires, white goods such as refrigerators and stoves, or solar panels.
• San Bernardino County. County Fire lists business waste, radioactives, explosives, medical waste, asbestos, refrigerant cylinders, treated wood waste, reactive waste, high watt-hour lithium-ion batteries, large compressed gas cylinders, remediation waste, large appliances and construction and demolition waste as not accepted.

Anything that might be explosive, including old ammunition, does not go in a box for a drop-off run. Leave it where it is, tell the walkthrough, and ask the county program who handles it. Ammunition found with firearms belongs with the steps in firearms in an inherited house, which are handled apart from everything else.

Which program serves the house

The program follows the county the house sits in, not the mailing address or where the family lives.

Los Angeles County: Pomona, Claremont, La Verne, San Dimas, Glendora

Los Angeles County Public Works runs household hazardous waste and e-waste collection through its CleanLA program, phone (888) CLEAN-LA. Temporary collection events are open to all Los Angeles County residents with no appointment needed. The permanent centers the county lists are in Palmdale, Signal Hill and the City of Los Angeles, and the city's S.A.F.E. Centers ask every participant for their address. For a garage in Pomona or Claremont, check the temporary event calendar as well as the permanent centers.

San Bernardino County: Ontario, Upland, Rancho Cucamonga, Chino

San Bernardino County Fire lists collection facilities in Ontario, at the Upland city yard, in Rancho Cucamonga and in Chino. Its services are for San Bernardino County residents only, and proof of residency may be requested. Hours differ by site and close for holidays, and the county asks residents to call 909-382-5401 or 1-800-OILY-CAT to verify hours before visiting. Fontana residents use Fontana's own facility.

The county line matters most at the edges. An Ontario house a few blocks from the Pomona line is a San Bernardino County house, so its paint cans go to the San Bernardino County program, not to a Los Angeles County event.

When the heir lives somewhere else

Both programs are written for county residents. If the person clearing the garage lives in another county or another state, call the program that serves the house before loading a car, and ask whether waste from that house qualifies. If the answer is no, or the trip cannot happen before a flight home, leaving the shelf for the buyer is a reasonable answer.

The rules for the trip, as the counties state them

If the family takes the materials in, these are the counties' own transport rules, not ours:

• The limit. Both counties cap a trip at 15 gallons or 125 pounds of household hazardous waste. Los Angeles County Public Works says carrying more than that per trip is illegal.
• Containers. San Bernardino County Fire asks for containers no larger than 5 gallons, sound and sealed.
• Labels. Keep materials in their original containers, or label them clearly. San Bernardino County Fire adds that if the contents differ from the label, cover the old label and write the correct contents.
• Packing. Los Angeles County asks that like chemicals be grouped together and unlike ones kept apart, in a cardboard box. Both counties want the load in the trunk, away from passengers; San Bernardino County Fire also allows the bed of a pickup truck.
• At the site. Stay in the vehicle while staff unload it, and be ready to leave the containers behind.

A garage with decades of paint cans can be more than one trip under that limit, and each trip falls on the days a site or event is open. That is where the time goes.

Leaving it for the buyer

On an as-is cash sale, nothing on the garage shelf has to move before the walkthrough. Tell us where the chemicals are: the shed, the rafters, under the sink, the side yard. The walkthrough notes them, and handling them becomes part of the clean-out line on the written offer, along with the rest of what the family leaves.

If a container is leaking, swollen or unlabeled, or a garage or shed smells strongly of fuel or chemicals, do not open, mix or pour anything together. Keep people out of that space and say so before the walkthrough, which is planned around what is safe. In an emergency, call 911.

Two paths, side by side

Figures are dashes; yours come from your house, your quotes and the written offer.

LineTake it in, clear, then listLeave it (as-is cash offer)

Who hauls it

You, in trips under the county limit

The buyer, after closing

Cost of the hazardous items

Your time, trips and fuel: -

Inside the clean-out line: -

Items the program refuses

Another route found by you: -

Taken on by the buyer

Residency check

Yours, if you live outside the county

Not needed

Rest of the clean-out

Paid by you: -

Deducted on the offer: -

Sale price

Open-market read, cleared and prepared: -

As-is cash offer: -

Net to you

-

-

The open-market read is a preliminary estimate, not an appraisal, built from comparable sales on your own streets. An automated estimate cannot see a garage at all.

When clearing it yourself nets more

Taking the materials in and listing the house can come out ahead when:

• the garage holds a few shelves, not a wall, and you live in the county the house is in;
• the garage is the last thing between the house and a listing, and the house underneath is in sound shape;
• a clean-out quote that excludes hazardous materials still comes in well below the offer's clean-out line once the family has handled those items (see clean-out quotes vs. leaving it);
• there is time, and the taxes, insurance and utilities while the house sits are manageable.

When that column nets more, the written recommendation says so, and the family is introduced to a designated local expert, an independently licensed California agent who works that neighborhood. Mr. Cali Offers never lists a house. Here is when we tell a seller to list instead.

What this looks like in practice

These are the kinds of files that come in, described without names or figures.

• An Ontario garage near the airport with paint cans stacked to the rafters and a gas can beside the mower.
• An Upland side-yard shed still holding pool chemicals for a pool that is long gone.
• A Pomona garage where an heir from out of state found car batteries and motor oil and could not reach a county event before flying home.

Next step

Tell us what is in the garage and the shed, and where, when you send the address through the full-contents house page. There is no cost and no obligation to get the two numbers and the written report.

Sources

• CalRecycle, Household Hazardous Waste: calrecycle.ca.gov (accessed November 6, 2026)
• Los Angeles County Public Works, CleanLA Household Hazardous Waste: cleanla.lacounty.gov (accessed November 6, 2026)
• Los Angeles County Public Works, CleanLA Collection Centers and temporary event rules: cleanla.lacounty.gov (accessed November 6, 2026)
• Los Angeles County Public Works, How do I transport household hazardous waste?: pw.lacounty.gov (accessed November 6, 2026)
• San Bernardino County Fire Protection District, Household Hazardous Waste: sbcfire.org (accessed November 6, 2026)
• San Bernardino County Fire Protection District, Accepted HHW Items: sbcfire.org (accessed November 6, 2026)
• San Bernardino County Fire Protection District, Collection Facilities: sbcfire.org (accessed November 6, 2026)

Cash offers come from independent buyers and investors who buy for their own account and may resell for profit; a cash offer is generally below what the open market would bring. Any value shown is a preliminary estimate, not an appraisal. Nothing here is legal, tax or financial advice.