|
|
|
|
|
|
What is TMDL?? A Total Maximum Daily Load (TMDL) is a calculation of the maximum amount of a pollutant that a water body can receive and still meet water quality standards, and an allocation of that amount to the pollutant's sources. Water quality standards are set by States, Territories, and Tribes. They identify the uses for each water body, for example, drinking water supply, contact recreation (swimming), and aquatic life support (fishing), and the scientific criteria to support that use. A TMDL is the sum of the allowable loads of a single pollutant from all contributing point and nonpoint sources. The calculation must include a margin of safety to ensure that the water body can be used for the purposes the State has designated. The calculation must also account for seasonal variation in water quality. The Clean Water Act, section 303, establishes the water quality standards and TMDL programs. Water bodies are identified as being impaired if they do not meet these standards.
|
|
|
Visitor Number:
|
|
|
Home About the Watershed About SAWPA Map to SAWPA Photo Gallery Glossary Members Commission Calendar Map Server Document Server Email FTP Site Departments Engineering Projects Planning Projects Other Projects Legislation Links News/Press Employment Contacts RFPs San Jacinto River Watershed Council Privacy Policy |
|
|
Copyright: Santa Ana Watershed
Project Authority, 2002 |
|