Household Waste Disposal

Household Hazardous Waste Events

The City of Redmond Solid Waste Program has events each year where household hazardous waste can be properly disposed of, for more information:  Redmond's Recycle Events or King County's Household Hazardous Waste Facilities.

For more information about household hazardous waste disposal options, check out the Local Hazardous Waste Management Program in King County.

Latex Paint Disposal

When your leftover latex paint cannot be used for touchups, small quantities that do not contain lead or mercury can be dried in the can and disposed of. Most house paint manufactured after 1991 will not contain lead or mercury. Also, the leftover paint can be painted on cardboard, dried and disposed of in a covered dumpster.

If your house paint was manufactured before 1992, it likely contains mercury and should be handled as hazardous waste. Resources for safe latex paint disposal include can be found at King County’s Local Hazardous Waste Management Program website.

What you need to know about your On-site Septic System

If your home is connected to an on-site septic system here are some basic practices to keep it functioning properly and prevent degradation of groundwater:
  • Never put chemical waste or non-human waste into a septic tank system. Septic systems are designed to only treat sewage from toilets, showers, sinks, dishwashers, laundry washers, and other plumbing fixtures.
  • Get regular inspections and maintenance. If you have a septic tank and a gravity drain every 2 to 3 years is recommended. If you have any other type of septic system, an inspection every year is recommended.
  • Garbage disposals should be used sparingly.
  • Keep trees at least 30 feet from the edge of the drain field to avoid damage from their roots.
  • Never drive over you septic system.
  • Watch for cues that your septic tank is nearing capacity, or is failing.
  • Conserve water. Too much can cause solids to escape your tank and plug your drain field.
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What is an on-site septic system and how does it work?

  • An on-site septic system is an underground holding tank that receives sewage for onsite treatment.
  • Bacteria inside the tank break down the waste anaerobically (without oxygen).
  • Liquid then flows to a drainfield and is released into the soil for further treatment and eventually filters down to groundwater.
  • The solids in the tank settle and must be occasionally removed by a certified septic system pumper. The pumped solids are then taken to an approved disposal facility.

What problems can the addition of chemicals and toxic substances do to my septic system?

If toxic substances or chemicals are dumped down the toilet or rinsed down the drain into your septic system it prevent the system from functioning properly and even permanently damage your septic system. Chemicals can disturb the bacteria in the septic tank, preventing proper treatment of the waste, causing the waste to pollute soil and groundwater (i.e. drinking water).

Pollution cleanup can be very expensive. Septic systems are designed to receive and treat sewage; the addition of chemicals and toxic substances is harmful to public health and the environment and violates federal, state, and local laws.

Benefits: Maintaining your septic system will save you money and protect your investment in your home. Also, you will be helping to protect Redmond’s water resources.

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