They can inhibit the system's ability to break down waste. Instead, take them to a community household hazardous waste collection event. Have septic tanks inspected every year and pumped out every 3-5 years. Septic system cleaning products which contain methylene chloride or 1,1,1-trichloroethane should not be used. Never discharge pool or spa water to a storm drain.
Chlorinated water is toxic to wildlife in ponds, rivers or streams.
It must be disposed of through the sanitary sewer system. Do not dispose of pet waste in the storm drain. Pick up after pets and dispose of wastes in the toilet or garbage. Free Household Hazardous Waste Collection Events are available for the disposal of up to 5 gallons or 50 pounds of hazardous waste periodically.