Total Maximum Daily Load (TMDL) reports are assessments of water quality in rivers, lakes, and streams in a given watershed where impairments exist. The report contains an overview of the waterbodies, the sources of pollutants, the methods used to analyze data, reductions in levels of pollutants needed to restore water quality, actions that need to be taken to reduce pollutant levels, and actions that are being taken to improve water quality. A watershed management plan (WMP) is a strategy and a work plan for achieving water resource goals that provides assessment and management information for a geographically defined watershed.
Use the WMP and TMDL Reports Search (WATRS) Tool to find TMDLs and watershed planning efforts in your area. A full list of completed and ongoing TMDL projects are listed below.
A TMDL Report will fall in one of three categories:
- TMDLs Under Development: These TMDLs are being researched and written and the progress is noted in the table.
- TMDLs on Public Notice: These TMDLs are in the final stage of approval and are in a Public Comment Period. A public comment period typically lasts thirty (30) days. All comments should be sent to the project manager on or before the close of business on the date listed.
- Approved TMDLs: These TMDLs have been approved by the U.S. Environmental Protection Agency, and are available to view, print, or download.
| TMDL Reports | |||
|---|---|---|---|
| TMDLs Under Development | |||
| TMDL Name | Notes | Documents | Progress |
| Big Raccoon-Wabash River | Big Raccoon-Wabash River Interactive Story Map | Public Notice of New Assessments | |
| Indian Creek-White River | Indian Creek-White River Interactive Story Map | Monitoring | |
| TMDLs on Public Notice | |||
| TMDL Name | Notes | Documents | Notice Dates * |
| * All comments are due in writing by close of business on the date specified | |||
| Approved TMDLs | |||
| TMDL Name | Parameter | Approval Date | |
| Beanblossom Creek | E. coli | 04/02/2006 | |
| Big Blue River | E. coli | 07/31/2006 | |
| Big Blue River (Lower) | E. coli | 07/14/2014 | |
| Big Raccoon Creek | E. coli Impaired Biotic Communities (IBC) | 09/20/2013 | |
| Black Creek | E. coli Impaired Biotic Communities (IBC) Dissolved Oxygen Nutrients | 02/29/2024 | |
| Blue River, South Fork | E. coli | 09/15/2017 | |
| Cicero Creek | E. coli | 09/30/2011 | |
| Deep River-Portage Burns | E. coli Impaired Biotic Communities (IBC) | 09/26/2014 | |
| Duck, Pipe, Killbuck, Stony Creek | E. coli | 04/23/2008 | |
| Eel River, Lower | E. coli | 03/28/2005 | |
| Fall Creek | E. coli | 03/31/2004 | |
| First Creek | E. coli | 04/29/2005 | |
| Flatrock-Haw Creek | E. coli | 09/22/2005 | |
| Galena River Watershed | E. coli | 09/20/2010 | |
| Highland-Pigeon Creek | E. coli Phosphorus | 09/07/2011 | |
| Indian Creek | E. coli | 07/19/2005 | |
| Kankakee/Iroquois Watershed | E. coli | 09/29/2009 | |
| Kessinger Ditch | E. coli | 04/05/2005 | |
| Kokomo Creek |
Dissolved Oxygen Ammonia | 03/05/2001 | |
| Lake Michigan | E. coli | 09/01/2004 | |
| Lambs Creek | E. coli | 03/01/2006 | |
| Laughery Creek | E. coli Impaired Biotic Communities (IBC) Nutrients Dissolved Oxygen | 09/02/2020 | |
| Limberlost Creek |
Nitrogen Phosphorus Total Suspended Solids | 07/16/2007 | |
| Little Calumet River and Burns Ditch | E. coli | 01/28/2005 | |
| Maria Creek | E. coli Impaired Biotic Communities (IBC) | 09/14/2021 | |
| Mississinewa River, Upper | E. coli Impaired Biotic Communities (IBC) | 02/24/2017 | |
| Otter Creek | E. coli | 09/20/2013 | |
| Pigeon River | E. coli Phosphorus | 09/20/2012 | |
| Pleasant Run | E. coli | 03/31/2004 | |
| Plummer Creek | E. coli | 06/08/2006 | |
| Prairie Creek | E. coli | 12/13/2004 | |
| Richland Creek | E. coli | 08/03/2006 | |
| Salt Creek | E. coli | 09/27/2004 | |
| Salt Creek (2012) | E. coliImpaired Biotic Communities (IBC) | 09/07/2012 | |
| Salt Creek, Lower | E. coli | 09/10/2018 | |
| St. Joseph River (Lake Erie) | E. coliPhosphorus Total Suspended Solids | 10/26/2017 | |
| St. Joseph River (Lake Michigan) | E. coli | 07/21/2004 | |
| St. Marys and Maumee | E. coliImpaired Biotic Communities (IBC) Nutrients |
08/21/2006 (E. coli) 09/22/2006 (IBC) | |
| Sugar Creek | E. coli | 05/14/2007 | |
| Trail Creek | E. coli | 03/01/2004 | |
| Upper Mill Creek | E. coli | 03/31/2005 | |
| Vernon Fork - Muscatatuck River | E. coliImpaired Biotic Communities Dissolved Oxygen | 09/09/2022 | |
| Wabash River | E. coliNutrients Impaired Biotic Communities (IBC) Dissolved Oxygen pH | 09/22/2006 | |
| White River, East Fork (Lower Watershed) | E. coliImpaired Biotic Communities (IBC) Nutrients Dissolved Oxygen | 12/19/2019 | |
| White River Headwaters, Upper | E. coli | 09/20/2011 | |
| White River, Middle West Fork | E. coli | 07/21/2005 | |
| White River, West Fork (Marion County to Waverly) | E. coli | 03/31/2004 | |
| White River, West Fork (Muncie to Hamilton-Marion County Line) | E. coli | 04/09/2004 | |
| White River, West Fork (Owen, Greene, and Monroe Counties) | E. coli | 08/16/2007 | |
| Whitewater River, East Fork | E. coli | 07/26/2007 | |
| Whitewater River, Southern | E. coliNutrients Impaired Biotic Communities (IBC) Dissolved Oxygen Siltation | 09/30/2015 | |
| Whitewater River, West Fork | E. coli | 04/02/2009 | |
| Wildcat Creek, Lower | E. coli | 09/24/2010 | |
| Wildcat Creek, Middle | E. coli | 09/24/2010 | |
| Wildcat Creek, South Fork | E. coli Nitrogen Phosphorus Total Suspended Solids | 07/31/2008 | |
| Wildcat Creek, Upper | E. coli | 09/24/2010 | |