The Indiana Integrated Water Monitoring and Assessment Reports (formerly known as 305(b) Reports) describe the condition of Indiana's streams, lakes, Great Lake shoreline and ground water. About one-fifth of the state waters are assessed for support of aquatic life, fishing, and recreational use each year. Section 305(b) of the Clean Water Act requires the state to report on how well the waters of the state support these beneficial uses. The Indiana Integrated Water Monitoring and Assessment Report is submitted to U.S. EPA in even-numbered years. A more informal update is prepared in odd-numbered years.
New - IDEM seeks public comment on Indiana’s Draft 2008 303(d) List of Impaired Waters for the development of the 2008 Indiana Integrated Water Monitoring and Assessment Report
2006 Integrated Water Quality Monitoring and Assessment Report [DOC - 7.4 MB file] - This is the entire narrative section of the report. Click on the page numbers within the table of contents to access the sections of the narrative. Other portions of the report are available below.
Note: Some of these files are very large and therefore you may experience long download times.
Indiana streams and lakes are monitored, and water quality is assessed on a five-year rotating basin cycle.
View the 1998 Surface Water Monitoring Strategy [PDF].
Waters that do not fully support all beneficial uses even though all permitted dischargers are meeting their permit limits are placed on the Section 303(d) List of Impaired Waters. Indiana's most recent impaired waters list was submitted to U.S. EPA in 2006.
For more information and 305(b) reports published in previous cycles contact: Jody Arthur, 305(b) Coordinator, (317) 234-1424.
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