Latex paint must be disposed of as hazardous waste. Although less toxic than oil-based paint, latex (water-based) paint can still harm the environment. Liquid latex paint cannot be disposed of in the regular trash, poured down sewer or storm drains, or dumped on the ground.
To dispose of leftover latex paint at UCSD:
Empty paint containers and used applicators are not hazardous waste and can go in the regular trash if they meet the following criteria:
- Containers: No paint pours out when it is held upside down, and any remaining paint is completely dry.
- It is illegal to deliberately air-dry latex paint or mix it with another substance to solidify it.
- Brushes, rollers, and other applicators: All remaining paint is dry.
Tips for minimizing latex paint waste:
- Buy only what you need.
- Store cans upside down with the lids secured.
- Use leftover paint on another project.
- Reuse applicators when possible.
For oil paint, thinner, and solvent disposal, read How to Store and Dispose of Hazardous Chemical Waste.
If you're a UC San Diego employee and have questions, contact the EH&S Environmental Management Facility, (858) 534-2753.
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