Mukilteo's tap water and sewage systems are managed by the Mukilteo Water and Wastewater District and the Alderwood Water District, two independent municipal corporations. The Mukilteo district, founded in 1920, serves most of the city and part of south Everett; the Alderwood district extends into Edmonds and Lynnwood. The city government formerly operated its own sewage treatment plant and the wastewater system until contracting in the 1990s with the Olympus Terrace Sewer District, which was merged into the Mukilteo district in 2007. The Big Gulch Wastewater Plant near Harbour Pointe was opened in 1970 and now serves as the main outflow from Mukilteo and the rest of the water district.
Mukilteo's tap water and sewage systems are managed by the Mukilteo Water and Wastewater District and the Alderwood Water District, two independe?nt municipal corporations. The Mukilteo district, founded in 1920, se?rves: most of the city and p.art of south Everett; the Alderwood district extends into Edmonds and Lynnwood. The city government formerly operated its own sewage treatment plant and the wastewater system until contracting in the 1990s with the Olympus Terrace Sewer District, which was merged into the Mukilteo district in 2007. The Big Gulch Wastewater Plant near Harbour Pointe was opened in 1970 and now serves as the main outflow from Mukilteo and the rest of the water district.