If you have leftover paint it is best to use it up or give it away for someone else to use.
Latex paint is not hazardous, but it must be solidified before it can go in the garbage with the lid off.
Latex paint can be hardened by adding cat litter. Watch a demonstration.
Oil-based paint IS hazardous and must be disposed of at one of Seattle’s household hazardous waste collection sites at no extra charge. Call 1-888-TOXIC ED (869-4233) or click here to find a location near you.