On–site wastewater design professional guidelines

Due to facility issues, this licensing program has limited operations. There may be delays in responding to requests. We apologize for the inconvenience. We’re working toward resuming all business operations as soon as possible.

Roles and responsibilities

Learn about the roles of on–site wastewater design professionals, and the subjects they typically address.

Exempt services

Find out which actions may be performed by professionals other than on–site wastewater designers and inspectors.

Related information

Washington Healthcare Finder
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Access Washington – official state government website