Note: This message is displayed if (1) your browser is not standards-compliant or (2) you have you disabled CSS. Read our Policies for more information.
Section 305(b) of the Clean Water Act requires the state to assess and report on how well the waters of Indiana support the beneficial uses designated in Indiana’s water quality standards [PDF]. Indiana’s Integrated Water Monitoring and Assessment Report (IR) is developed every two years to fulfill this requirement and describes the condition of Indiana's lakes and streams, the Lake Michigan shoreline, and ground water. The IR is submitted to the U.S. EPA in even-numbered years. In odd-numbered years, the IDEM sends a copy of its Assessment Database to the U.S. EPA as an electronic update.
For more information contact the 305(b)/303(d) Coordinator: (317) 234-1424.