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Wastewater Treatment

King County, Washington

For questions about the Wastewater Treatment Division website, please send an e-mail message or contact us at:

King Street Center
201 S. Jackson St., Suite 500
Seattle, WA 98104-3855
Phone: 206-477-5371
Fax: 206-684-1741
Telecommunication device for the deaf (TTY): 711

Get Directions to our office location in Seattle, Washington.

Staff Contacts

Let's talk trash

Protecting water quality starts with each of us!

Don't flush trouble - these items belong in the trash can! (Click for PDF file, English version.)
View print version (PDF).

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Helpful hint: Print out the flier above and post it in your bathroom or kitchen to remind yourself what needs to be thrown away!

When it comes to disposal...

Drains, toilets and trash cans are not all the same. Disposing of trash down drains and toilets can lead to sewer overflows and back-ups that can cause harm to human health and our local environment.

In the kitchen

  • grease & produce stickers = trash
  • food = compost or yardwaste bins for City of Seattle Residents, or a garbage disposal.

Grease sticks to household and sewage pipes. Over time, grease build-up will block the entire pipe and result in raw sewage backing up into your home or overflowing into the street or waterway. Follow these four simple steps to keep things running smoothly.

  • Don't put produce stickers down the drainDon't put produce stickers down the drain.
  • Don't put grease, fats, or oil of any type down your drain or garbage disposal.
  • Do use baskets or strainers in sink drains to catch food scrapsDo use baskets or strainers in sink drains to catch food scraps and other solids and empty them into the trash or compost them.
  • Do scrape grease and food scraps from cooking surfaces into a container and put in the trash can, or compost them.

In the bathroom

Think trash not toilets. Flushing the wrong thing down the toilet damages your household plumbing, your environment and the wastewater treatment system. If it isn't from your body or toilet paper, put it in the trash instead of the toilet.

Help us protect Puget Sound. Learn about proper trash disposal and what should not go in the toilet
Help us protect Puget Sound
 (video). Learn about proper trash disposal and what should not go in the toilet. Duncan and Emily also share what you can do to reduce pollution from entering storm drains. 

Related news

Related information

A side sewer saga video (external link -- City of Seattle)

Can the wipes
Can the wipes
(external link about 'disposable' items that should not be flushed down the toilet - from: Clean Water Services, Hillsboro, Oregon)

toilet How to Get Rid of Stuff You Don't Want or Need--recommended methods for disposing of residential and household waste.

Things You Can Do to Protect Your Environment--links to information about things you can do to protect your home and family, the wastewater treatment process, and water quality.

Eliminating Fats, Oils and Grease (FOG) from our Sewers--lists common household sources of grease, potential results of a grease-blocked sewer pipe, and what you can do to keep fats, oils and greases out of the sewer.

Bert the Salmon's Tips for Saving Water--things you can do to conserve water inside and outside your home.

King County Sound Tips--King County-sponsored events and opportunities, and some "Sound Tips" to help everyone make a difference.

Getting Pharmaceuticals Out of Our Water--Video Public Service Message
U.S. EPA, Region 9, Water Program

Medicine Take Back Program, (external link)