King County WTD collects and treats approximately 175 million gallons of wastewater per day from about 1.7 million people. Source control efforts help prevent pollutants from entering the wastewater system. Check out their main webpage and be sure to navigate to whichever of the 12 topic tiles interest you! Poke around!
This two-page fast-facts infographic highlights the successes of King County’s WTD as a clean water utility dedicated to protecting public health and enhancing the environment. View impact data on sustainability indicators including number of people educated, amount of water recycled, and total energy saved.
A 2017 “Infrastructure Report Card” infographic featuring wastewater statistics. See this page for large-scale facts about the current status and needs of U.S. wastewater infrastructure.
WTD Project Case Study Videos: What’s going on in King County?
Sixty Acres Park (1:01)
Wastewater Treatment Plant Tour Videos:
How does water from my toilet become clean? Engineering!
How can we impact the Clean Water Plan, and how does it impact us?
These 4 mid-length videos, targeted towards an elementary-aged audience, introduce fundamental concepts in wastewater. Narrators are interesting and speak directly to a student audience, often encouraging viewers to participate and actively learn with their own materials
Lesson 1 - What is Wastewater? (31:06)
Lesson 2 - Dirty Water Challenge (27:55)
Lesson 4 - Wastewater Stewards (18:36)
Is human urine just what plants need amid a fertilizer shortage? Human urine is, in fact, full of the same nutrients that plants need to flourish — even more than poop!
Poop as a fertilizer?! Of course! Loop is King County’s biosolids product. It is an endlessly renewable resource. For over 40 years, it has recycled the nutrients in our food back to the land the same way nature does. Learn more on the main page of their website.
Part of WTD’s mission is “recycling valuable resources” from wastewater treatment, including recycled water, biosolids, and energy produced from biogas. See how the county specifically plans to deal with biosolids in this comprehensive 17-page planning document.
Page 7-8 - Strategic Plan Overview Table with 3 main goals
Page 14 - Goals Rationale, summarizing strategy behind key goals
Learn about Loop®, King County’s biosolids product, through these 4 short videos. Loop® is a fertilizer alternative produced by cleaning, recycling, and transforming King County's wastewater into biosolids
King County’s recycled water is created by advanced wastewater treatment that works to mimic nature’s processes of filtering and cleaning used water. Be sure to check out the county’s Water Uses page to learn about specific areas where recycled water is most crucial. Curious about locations of existing recycled water systems? Check out King County Recycled Water Maps.
WTD is the first in Washington state and one of the first wastewater utilities in the nation to offer Sewer Heat Recovery (SHR). Private commercial property owners and developers can recover heat energy from our sewer pipes for heating or cooling their buildings. Check out a cool graphic on how it works here!
Combined Sewer Overflows
In certain neighborhoods in Seattle, sewage and stormwater are carried by the same pipes in a combined sewer system. When heavy rains fill the pipes, CSOs release untreated sewage and stormwater into rivers, lakes, or Puget Sound.
Take a peek into how the city dealt with wastewater overflows in 2020 through this cool infographic. Be sure to look at the map labeling CSO outfall locations!