Name: TMDL Development Priority HUC Basins

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Description: A TMDL (Total Maximum Daily Load is a scientific determination of the maximum amount of a given pollutant that a surface water can absorb and still meet the water quality standards that protect its designated uses including recreation, human health, and aquatic life. Water bodies that do not meet water quality standards are identified as 'impaired' for the particular pollutants of concern — nutrients, bacteria, mercury, etc. — and TMDLs must be developed, adopted and implemented for those pollutants to reduce pollutants and restore the water body so that designated uses are attained. The threshold limits on pollutants in surface waters — Florida's surface water quality standards on which TMDLs are based —are set forth primarily in rules 62-302 and 62-303, Florida Administrative Code (FAC), and the associated table of water quality criteria. Adopted TMDL rules are included in Chapter 62-304, FAC. The data layer depicts the hydrologic basins where the State of Florida has proposed future development of TMDLs through 2022. These basins are based on the Hydrologic Unit Code (HUC) watersheds that are delineated by USGS using a nationwide system based on surface hydrologic features. This system divides the country into 21 regions (2-digit), 222 subregions (4-digit), 370 basins (6-digit), 2,270 subbasins (8-digit), approximately 20,000 watersheds (10-digit), and approximately 100,000 subwatersheds (12-digit). The HUC basins shown here are at the 8-digit level.

Copyright Text: Florida Department of Environmental Protection (DEP), Division of Environmental Assessment & Restoration

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