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Central Wastewater Treatment Plant

Sediment Tanks

The Central Wastewater Treatment Plant features one of the most technologically advanced treatment processes in the country. It serves Tacoma and about 20,000 customers in Fife, Fircrest and unincorporated Pierce County.

Every bit of the biosolids material processed at the plant is recycled and turned into TAGRO gardening products - Mix and Potting Soil. These award-winning soil products will help your garden grow.

The Central Wastewater Treatment Plant has many innovative features including a dual digestion process that produces Class A exceptional quality biosolids and a peak flow treatment facility that can speed up treatment during heavy storms and reduce the risk of sewage overflows. During large storm events, the plant receives and treats more than 130 million gallons of waste water a day. The Central Wastewater Treatment Plant has played a role in Tacoma's development and was upgraded in 2008.

In 2014, the Pierce County Flood Control Zone District Board provided $6 million in locally matched funds to build a floodwall around Tacoma’s Central Wastewater Treatment Plant. The project was selected primarily due to its high risk ranking; an overflow could introduce untreated wastewater into waterways with negative regional impacts to water-based businesses, recreation and wildlife.

Driving Directions to the Central Wastewater Treatment Plant

From I-5 Southbound
  1. Take Exit 135 - Portland Avenue
  2. Turn right onto Portland Avenue
  3. Proceed under Highway 509
  4. The Central Treatment Plant is on your right

From I-5 Northbound
  1. Take Exit 134 - Portland Avenue
  2. Turn left onto Portland Avenue
  3. Proceed under Highway 509
  4. The Central Treatment Plant is on your right

For more information or to schedule a tour of the Central Wastewater Treatment Plant, call (253) 591-5588.