It is illegal in California to toss household hazardous waste (HHW) into the trash. Be sure to always take HHW like motor oil and oil filters, anti-freeze, paints, solvents, cleaners and old batteries to a certified collection facility. Riverside County has three permanent collection centers that offer free drop-off service and safe disposal of your unwanted chemicals. The county also sponsors occasional HHW collection events. Visit their website for a list of accepted materials and hours of operation.