Our employees plan, design, build, and operate treatment facilities to clean wastewater for the region. Planning and building new wastewater infrastructure is complex. It can easily take a decade or more to go from identifying a project is needed, to cutting the ribbon on a newly completed facility. Each project goes through several phases of…
The employees who inspect and monitor all of the structures and pipes within the regional sewer system have a big job to do – with over 380 miles of sewer pipes to check, spread out over 424 square miles. The Conveyance Inspection and Flow Monitoring (CIFM) group uses instruments and equipment to see what’s happening…
It’s important to us that our wastewater facilities to be a good neighbor to the people who live, work and play near them. Part of being a good neighbor means that we work hard to control odors / smells that come from the wastewater treatment process—which can get gassy! Why does sewage smell? Treating dirty water at…
Built in 1966, West Point Treatment Plant is the largest wastewater treatment plant by volume in Washington state, and the third largest by average daily flow on the West Coast. Like much of the King County wastewater system, it’s more than 55 years old and many of its components reach their “end of life” each…
Power disruptions during heavy rainfall As a clean water agency, our mission is to protect public health and the environment. We work 24/7 to serve over 1.8 million residents and clean about 190 million gallons of water per day. Even in massive rainstorms that generate more volume than the system can handle, we feel any…
We clean wastewater for the region Pipes from homes and businesses in this area connect to local sewer systems. Then those local utility pipes connect to our bigger pipes, which carry wastewater to one of our regional treatment plants where we clean it. The local agencies own and operate their independent collection systems. The local…
It’s important for King County facilities to be a good neighbor to the people who live, work and play near us. At the County’s South Treatment Plant in Renton, we work 24-7 to treat the water that people use in homes and businesses before releasing the treated water back to Puget Sound to become part…
As we move into the rainy season, our crews are on the job 24/7 to ensure the region’s wastewater treatment service is well-prepared for an emergency or stormy weather. To make sure we’re ready for what wet weather can bring, we have inspected and replaced equipment, updated control systems and increased training of treatment plant…
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. King County Wastewater Treatment Division has important water quality investment decisions to make. The decisions…
There’s a lot of construction work planned for the Redmond area in the next few years. One of these projects is King County’s Lake Hills/NW Lake Sammamish Sewer Upgrade. King County needs to upgrade a regional sewer pipe that is undersized and aging. This 4.5-mile-long sewer pipe is located underground in trails, roads, parks, and…
King County Wastewater Treatment 