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Closures: Wednesday through Friday, Nov. 25-27, many county offices will be closed and staff will be on unpaid furlough and on Thanksgiving holiday. (See links for exceptions, such as courts and Public Defender.)

How to find us

Phone: 206-296-4600
TTY Relay: 711

Toll-free: 800-325-6165

Click here to email us

Instructions to submit a Public Records Request

Information for septic system owners

A well-managed system works well and lasts a long time. A system that doesn't work or "fails" is an immediate health risk. As the owner of a septic system, you are its "Operation and Maintenance Manager."

Septic education and care
Buying, selling or transferring properties with septic systems
As-builts (a 'map' of your septic system)
Permits, Applications, Forms and Codes
Lists of septic professionals
Questions and comments
How to get free brochures
Complete list of Wastewater Program fees