Total Maximum Daily Loads
Total Maximum Daily Loads (TMDLs)   - The sum of the individual waste load allocations and load allocations; a margin of safety is included with the two types of allocations so that any additional loading, regardless of source, would not produce a violation of water quality standards.
  To find a graphical representation of a particular stream of interest, go to eMapPA, DEP's web-based GIS system . After zooming in on a geographical area of interest, open the streams folder. Select one or more of the stream attributes and click on refresh to make visible.
US EPA Region III website has additional information about TMDLS
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