Central Sierra
University of California
Central Sierra


At several of the “Water Schools” I was asked questions about TMDLs in our area.  Just a little background:

A TMDL (Total Maximum Daily Load) is term that refers to the level of pollutants in a water body. How much of a particular pollutant, say, Phosphorous, can a stream assimilate, or deal with in a day’s time without causing the water to no longer be usable? If the level of that pollutant exceeds the appropriate daily level, it may trigger the State of California, through it’s local Regional Water Quality Control Board, to develop a TMDL program.  These programs are designed to clean up the particular pollutant over a period of several years.  The TMDL programs may have serious implications for your growing operations in the affected watersheds, particularly if the pollutants that are being targeted are related to agricultural production.

Here is a link to the TMDL’s that are on the list in the San Diego area.  Not all of these programs are started yet, but are on the list for current or future TMDL development.


Posted on Friday, July 8, 2011 at 12:09 PM
  • Posted By: Valerie J. Mellano
  • Written by: Valerie J. Mellano, Ph.D.

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