Images of Perry County Conservation District Programs
Skip navigation links
.: HOME :.
.: SEARCH :.
.: CALENDAR :.
Perry County Conservation District > Total Maximum Daily Load
Skip navigation links
Home
Calendar
About UsExpand About Us
Water Quality ProgramsExpand Water Quality Programs
Agriculture ProgramsExpand Agriculture Programs
WatershedsExpand Watersheds
EducationExpand Education
Recycling
Solid Waste Management
Keep Perry County Beautiful
Big Trees of Perry County
Resources and LinksExpand Resources and Links

 Total Maximum Daily Load

What is a TMDL?
Simply stated, Total Maximum Daily Load (TMDL) is the amount of a particular pollutant that a particular stream, lake, estuary or other water body can 'handle' without violating state water quality standards.  Once a TMDL is established, responsibility for reducing pollution among both point sources (discharge pipes) and non point sources is assigned.  Non point sources include, but are not limited to, run-off from urban, residential, agricultural, and construction areas, stream channel alteration, and damage to riparian areas.  Clean up is ultimately the responsibility of everyone who lives, works or plays in a watershed that drains into an impaired water body.  However, according the Clean Water Act, EPA is responsible ... if the states forgo their responsibility.  Perry County currently has 8 impaired streams however the County has no streams with TMDL status.  To view streams with a TMDL in Pennsylvania click on the following link to go to the DEP Emap webpage: default.aspx
 
Establishing a TMDL
  • Identify waters that do not meet water quality standards. In this process, the state identifies the particular pollutant(s) causing the water not to meet standards.
  • Prioritize waters that do not meet standards for TMDL development (for example, waters with high naturally occurring "pollution" will fall to the bottom of the list).
  • Establish TMDLs (set the amount of pollutant that needs to be reduced and assign responsibilities) for priority waters to meet state water quality standards. A separate TMDL is set to address each pollutant with concentrations over the standards.
  • Strategy to reduce pollution and assess progress made during implementation of the strategy. This is when a watershed partnership most likely will want to get involved. If the partnership has already developed a plan of action, it should be shared with the state. In fact, several states have incorporated watershed partnership plans in the state's strategy for specific TMDLs.