Nutrients from agricultural, municipal, and industrial sources in Iowa impact not only State of Iowa waters but also downstream waters all the way to the Gulf of Mexico. The 2008 Gulf Hypoxia Action Plan established a goal of at least a 45% reduction in total nitrogen (TN) and total phosphorus (TP) loads to the Mississippi River from Iowa and other states along the river.
Point source implementation, led by the Iowa Department of Natural Resources (IDNR), has already begun through issuance of NPDES permits. The process for municipal wastewater treatment plants will vary for facilities where biological nutrient removal has already been installed or is planned and/or where treatment capacity increases are under construction or planned. Typical activities in response to the strategy include planning and feasibility evaluation, permitting and funding, and implementation through design and construction.
The brochure highlights the process for the 102 major municipalities identified in the nutrient strategy.
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