RCW 57.08.180: Sewer, drainage, and water connections without district permission—Penalties.

It is unlawful and a misdemeanor to make, or cause to be made, or to maintain any connection with any sewer, drainage, or water system of any district, or with any sewer, drainage, or water system which is connected directly or indirectly with any sewer, drainage, or water system of any district without having permission from the district.