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Impaired Waters and Stormwater | US EPA, 2019

This resource provides guidance in assessing impaired waters potentially contaminated with pollutants from stormwater sources.
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  • Technical Details
  • Technical Options: Highly Technical
  • Technical Topic: Total Maximum Daily Load (TMDL)

The most common pollutants include sediment, pathogens, nutrients and metals Рsuch impaired waters need Total Maximum Daily Loads (TMDLs) Рthis resource provides examples of what states have done to identify/address/implement via National Pollutant Discharge Elimination System (NPDES) stormwater permitting system. 

TMDLs identify the total pollutant loading that a waterbody can receive and still meet water quality standards.

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