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Service Description: Section 303(d) of the Clean Water Act requires states to identify all waters that are not meeting their water quality standards and are impaired. For these impaired waters, the state must develop Total Maximum Daily Loads (TMDLs) which represent the maximum amount of a pollutant that can enter a water body so that the water body will meet and continue to meet state water quality standards. TMDLs include pollutant loadings from both point sources and non-point sources and also include a margin of safety. TMDLs serve as planning tools for developing specific controls needed to meet water quality standards. This service contains waterbodies with completed TMDLs and Impaired Waters, both linear and polygonal, from the 2024 Active 303d list. For more information visit the 303(d) / TMDL Page on the MDEQ Website
Link to 2024 303d Report
Data Download MS2024 303d/TMDL Complete
The Mississippi Department of Environmental Quality makes no warranties, expressed or implied, as to the accuracy, completeness, currentness, reliability, or suitability for any particular purpose of the data contained here in.
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Layers:
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MS 2024 303(d) Report Data (0)
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Impaired List (1)
- ms303d_2024l (2)
- ms303d_2024p (3)
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TMDL Completed/Other Off-ramp Waters (4)
- Other Off-ramp (5)
- TMDL_Complete_l (6)
- TMDL_Complete_p (7)
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Impaired List (1)
Copyright Text: MDEQ, The Geospatial Group, JALLEY, DCOOK, STRIGG
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Subject: Mississippi 2024 Sec 303(d) list of Impaired Waters and TMDL Complete
Category:
Keywords: MS303d,Impaired Water,Clean Water Act Section 303d
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Supported Operations: Export Map Identify Find Return Updates Generate KML