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Iowa's Section 303(d) Impaired Waters Listings

Under Section 303(d) of the Clean Water Act, states are required from "time to time" to submit a list of waters for which effluent limits will not be sufficient to meet all state water quality standards. EPA has defined "time to time" to mean April 1 of even numbered years. The failure to meet water quality standards might be due to an individual pollutant, multiple pollutants, "pollution," or an unknown cause of impairment. The 303(d) listing process includes waters impaired by point sources and non-point sources of pollutants.

Iowa Department of Agriculture and Land Stewardship - Division of Soil Conservation & Water Quality

Land stewardship is central to the work of the Department of Agriculture and Land Stewardship. The Division of Soil Conservation provides farmers with expertise and funds to help them install practices that preserve our highly productive soil, prevent erosion and protect our critical waterways. The Department is focused on making sure future Iowans can experience the same high quality of life that past generations have enjoyed in our state.

Iowa Water Center

Established in 1964, the Iowa Center (IWC) is a federally funded program. Its purposes are to identify research needs and fund selected projects about Iowa’s water quality, water quantity, and the human dimensions of water-resources management, provide outreach and education opportunities to familiarize water-resource professionals, teachers, and students with current research about Iowa’s water resources, disseminate information about Iowa’s water resources to water-resource specialists, teachers, students, policymakers, and the general public.

Iowa Flood Center

The Iowa Flood Center (IFC) provides Iowans information to help individuals and communities understand flood risks. The IFC is actively engaged in flood projects in several Iowa communities and employs several graduate and undergraduate students participating in flood-related research. IFC researchers have designed a cost-efficient sensor network to better monitor stream flow in the state; have developed a library of flood-inundation maps for several Iowa communities; and are working on a large project to develop new floodplain map for 85 of Iowa’s 99 counties.
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Upcoming Soil Conference

October 29, 2015

The Drake University Agricultural Law Center, in cooperation with the Leopold Center for Sustainable Agriculture at Iowa State University, will host a two-day conference to explore soil and water conservation policy.

The conference, titled “Sustaining Our Iowa Land (SOIL): The Past, Present, and Future of Iowa’s Soil and Water Conservation Policy,” is Nov. 19-20 at the Olmsted Center, Drake University. Read more about Upcoming Soil Conference

Questions and Answers Regarding Nitrogen and Water Quality

Due to increased awareness of nutrient management and water quality, Iowa State University Extension and Outreach has received a number of questions about nitrogen movement from Iowa’s cropping systems into surface and subsurface water. The following frequently asked questions and answers have been prepared to clarify aspects of nitrogen management and nitrogen movement in the soil system.

Water Quality Talking Points

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