Residential household hazardous waste (HHW) collection is held the first Saturday of each month from 9:00 a.m. to 3:00 p.m. at the Department of Public Works, 10430 Audie Lane, La Plata. Improper disposal of leftover household products that contain corrosive, toxic, ignitable, or reactive ingredients can pollute the environment and pose a threat to human health. Latex Paint is not toxic and once solidified can be disposed of in your household trash.