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The North Santiam Sewer Authority (NSSA) was established in May 2020 under Oregon Revised Statute (ORS) 190, which allows units of local government, under written agreement, to form an independent intergovernmental entity.


The North Santiam Canyon cities of Mill City, Gates, Detroit, and Idanha, recognizing shared interests in the long-term economic vitality of the Canyon and health of the North Santiam River watershed, formed the NSSA to address the collective need for a Canyon wastewater solution.


Under the intergovernmental agreement adopted by all four cities, the NSSA board consists of eight authorized voting members (two from each city).

Click here to view a brief video about the history and importance of the NSSA.

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