December 23, 2025
Progress across communities, waterways, and projects in 2025
Steady work strengthened the system, from capital upgrades to river cleanup and daily operations.
October 30, 2025
Protecting Puget Sound through source control
The King County Industrial Waste Program is offering treatment plant tours and conducting a comprehensive survey to help manage industrial pollutants, including PFAS and 6PPD-Q, that could enter our regional wastewater system and impact Puget Sound.
September 13, 2024
Once a gas station, this converted art space makes an outsized impact on water quality
Discover how King County’s WaterWorks Grant Program helped transform a former gas station into an eco-friendly art space in Georgetown. The Mini Mart City Park uses the power of green infrastructure to improve local water quality while also providing classroom…
September 15, 2023
Swapping backpacks for hardhats, a summer job like no other
King County has been partnering with the Mountains to Sound Greenway Trust since 2016, as part the Wastewater Treatment Division’s efforts to cultivate the next generation of clean water professionals and to build more ties to communities in our service…
August 11, 2022
Celebrating our award-winning treatment plants
All five of King County’s wastewater treatment plants received 2021 National Association of Clean Water Agency’s Peak Performance Awards, honoring multiple consecutive years of compliance with state and federal effluent permit limits.
September 20, 2021
Reducing nitrogen in Puget Sound where it matters
King County is committed to protecting water quality and reducing harm to fish and aquatic life in Puget Sound’s shallow bays caused by human sources of nitrogen.
September 22, 2020
Utility of the Future Today & awards for outstanding performance
King County Wastewater Treatment Division (WTD) has received national recognition as a Utility of the Future Today for its beneficial use of Loop® biosolids. WTD is one of 65 water utilities being recognized for transformational work in community engagement, watershed stewardship,…
October 30, 2019
Help us protect recovering landscapes
Some colorful new signs may catch your eye at former King County Wastewater Treatment Division (WTD) construction sites. WTD’s Mitigation and Monitoring (M/M) Program is installing new signs to alert people and help them protect recovering landscapes. WTD’s project teams…
October 28, 2019
Let WTD know your priorities for the Clean Water Plan
Online Clean Water Plan questionnaire closes Nov. 1 -- tell us what you think Since spring 2019, we have been talking with people about the Clean Water Plan and listening to their priorities for our rivers, lakes, and Puget Sound. …
September 6, 2019
RainWise is working to promote Green Stormwater Infrastructure!
The RainWise program were big participants in August’s Neighbor Night Out celebration. RainWise staff and partners visited 14 different block parties hosted by current RainWise customers, and spread the word about the program to over 300 residents. This is the…
August 2, 2019
PopUp Storywalk at Carkeek Park until August 5
Water Princess, installed as a PopUp Storywalk at Carkeek Park, July 19-August 5 King County Wastewater Treatment Division is partnering with PopUp Storywalk and Seattle Parks for a fun summer activity. Come walk the trails at Carkeek Park and enjoy…