Princeton's WordNet(0.00 / 0 votes)Rate this definition: 1  riser(noun) a person who rises (especially from bed) he's usually a late riser. 2  riser, riser pipe, riser pipeline, riser main(noun) a vertical pipe in a building. 3  riser(noun) structural member consisting of the vertical part of a stair or step.
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Utilities Department. The Noblesville Utilities Department is a 24-hour facility that handles wastewater treatment. Additionally, the department handles the monthly wastewater utility treatment costs, sanitary sewer line locations, sewer problem resolutions, and collection system assistance.dditionally, the department handles the monthly wastewater utility treatment costs, sanitary sewer line locations, sewer problem resolutions, and collection system assistance.