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Street Address:  17238 NE Woodinville-Duvall Road, Woodinville,  WA  98072
Mailing Address:  PO Box 1390,  Woodinville,  WA  98072
Mail Payments:    PO Box 94210,  Seattle,  WA  98124-6510

After Hours Emergency or Urgent Request — Call (425) 487- 4100. Remain on the line and follow instructions (do not press 0). You will be transferred to page our on-call technician. You will be called back.


Customer Service - (425) 487-4100  or  (425) 827-2020  Fax: (425) 485-6381

Engineering Department - (425) 487-4100 Fax Number - (425) 483-0327

Finance Department - (425) 487-4100 Fax Number - (425) 487-4188

General & Administration Department - (425) 487-4100  Fax Number - (425) 483-0327

Information Technology Department - (425) 487-4100 Fax Number - (425) 487-4188

Operations and Maintenance Department - (425) 487-4100  Fax Number -  (425) 487-4189