The City of Sioux City provides water to the entire Sioux City MSA within the three-state region and has additional capacity and source to meet the increasing industrial and commercial needs of the metro area. The Zenith Plant is a conventional filter plant with a capacity of 30 million gallons per day (MGD). The new Southbridge Regional Water Treatment Plant, a membrane filter plant completed in 2011, has an initial capacity of 10 MGD expandable to 30 MGD.
The City of Sioux City provides quality waste management services with infrastructure and capacity available to facilitate growth. The City's sanitary sewer plant underwent a $73.6 million multi-phase expansion and upgrade in 2012. The plant is sized and configured to handle future industries in the food processing, agri-business, and biotechnology sectors.