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State Water Boards: TMDL

Total Maximum Daily Load Program

2006 CLEAN WATER ACT SECTION 303(d) LIST OF WATER QUALITY LIMITED SEGMENTS
Geographical Information System (GIS) Files

Disclaimer for 2006 303(d) List GIS Files

The GIS files for the 2006 303(d) List of Water Quality Limited Segments (requiring TMDLs, being addressed by USEPA approved TMDLs and being addressed by actions other than TMDLs) were created for reporting purposes by the SWRCB and RWQCB. These GIS representations of the areal extent of impaired waters are estimated and should not be considered authoritative for the development of TMDLs or other regulatory actions. The TMDL (Total Maximum Daily Load) effort may ultimately address more or less area. Mapping the 303(d) listed waters is a work in progress and will be updated during each listing cycle to better define the impacted areas.

Download GIS shapefiles for 2006 303(d) List of Water Quality Limited Segments (zip files)

Download 2006 303(d) List Information Tables to Associate/Link withGIS files [ Excel ]

If you have questions about the files presented on this web page, please contact Nancy Kapellas at nkapellas@waterboards.ca.gov or (916) 341-5546.

( updated 9/27/07 )