Septic tanks can’t treat everything, so don’t pour hazardous waste such as paints, solvents, pesticides, antifreeze, and hazardous cleaners down the drain or flush old medications down the toilet. Wastewater eventually makes its way to your drainfield and joins groundwater traveling towards surface waters. Protect our precious lakes and rivers by properly disposing of hazardous household waste at one of nine collection events starting on August 5 in Douglas County.