The City of Johnston is a member of the Des Moines Metropolitan Wastewater Reclamation Authority (WRA), which is made-up of 17 metro area municipalities, counties and sewer districts. They work together to protect public health and to enhance the environment by recycling wastewater and being the preferred treatment facilities for hauled liquid wastes.
Waste water leaving your home is transported to a WRA facility for processing. The city provides billing and collection services and maintains the collection system. Sewer rates (PDF) reflect the costs associated with WRA processing fees and maintaining the collection system.