7824 Mukilteo Speedway
PO Box 260
Mukilteo, WA  98275


Maps and Directions

Administration & Operations

Big Gulch Wastewater Treatment Facility Directions

The Wastewater Treatment Plant is located at 9417 62nd Pl W, Mukilteo, Washington. If you have any questions about the map or directions, please call 425-355-6637.


From Mukilteo Speedway

From Mukilteo Speedway, turn west onto 92nd St SW. At the "Y" (92nd and 61st Pl W) stay to the left, and you will still be on 92nd St SW. Take a left onto 62nd Pl W. Take a left onto 95th Pl SW. You will see the metal gate on your right. This is the top of the one lane, winding road leading to the treatment plant. When you reach the treatment plant, there will be a pedestal on your left. Ring the call button. If there is no answer, honk your horn. If you have any questions about the directions, please call 425-355-6637.



Mailing Address:
PO Box 260
Mukilteo, WA 98275-0260

Main Office
Street Address:
7824 Mukilteo Speedway
Mukilteo, WA

Phone Number: 425-355-3355
Fax Number: 425-348-0645

Contact Us

Big Gulch Wastewater Treatment Facility

Street Address:
9417 62nd Pl W
Mukilteo, WA

Phone Number: 425-355-6637
Fax Number: 425-355-4263

Service Areas

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