The Cities Pasco, Richland, and Kennewick are urging citizens to discontinue flush anything down your toilet other than toilet paper

Here's the message from the City of Kennewick

Only toilet paper is made to disintegrate as it flows through the sewer system – other items do not break down and can cause blockages in the City sewer system or in private sewer lines. Property owners are responsible for the sewer service line from the home or business up to the connection at the City’s sewer main. Costs to unblock or repair clogged private sewer lines are the responsibility of the property owner and can be expensive