Section 303(d) of the Clean Water Act requires each state develop a list of waterbodies that need additional work beyond existing controls to achieve or maintain water quality standards, and submit an updated list to the Environmental Protection Agency (EPA) every two years. The additional work necessary includes the establishment of Total Maximum Daily Loads (TMDLs). The TMDL process provides an analytical framework to identify the relative contributions of each pollutant. The TMDL identifies the sources and causes of pollution, e.g., point sources, non-point sources, or a combination of both, and establishes allocations for each source of pollution as needed to attain water quality standards.

The Section 303(d) List provides a comprehensive inventory of water bodies impaired by all sources. This inventory is the basis for targeting water bodies for watershed-based solutions, and the TMDL process provides an organized framework to develop these solutions.

Nevada's 2006 303(d) Impaired Waters List: Section 303(d) of the Clean Water Act requires each state develop a list of waterbodies that need additional work beyond existing controls to achieve or maintain water quality standards, and submit an updated list to the Environmental Protection Agency (EPA) every two years.

Nevada's 2006 303(d) Impaired Waters List provides a comprehensive inventory of water bodies impaired by all sources. This inventory is the basis for targeting water bodies for watershed-based solutions, and the TMDL process provides an organized framework to develop these solutions.

Nevada's Final 2006 303(d) Impaired Waters List [27 Pages]
Attachment 1 - Nevada's 2006 303(d) List of Impaired Waters
Attachment 2 - Nevada's 2006 303(d) Delisted Waters
Attachment 3 - NDEP Database Stations Used in the Evaluation
303(d)/305(b) Archives – Previous lists and information

   Water Quality Planning GIS Information Center

Nevada 2006 303d/305b Assessed Waters. GIS shapefile coverages of the 2006 assessed waters in Nevada: 1) Lakes and Reservoirs, 2) Rivers and Streams, and 3) waters with TMDL's.