If that's not possible, dispose of latex (water-based) paint in your regular household trash. We've got how-to instructions on our website.
Making sure that the paint is completely solidified before you set it out for trash collection is critical. Paint spills are very challenging to clean up.
(Reminder: it's only oil-based paint which must be disposed of as household hazardous waste. If the oil-based paint is from your business, consider our Ecowise program for small-quantity generators.)