Clean Water Act § 303(d) List of Impaired Waters
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Under section 303(d) of the 1972 Clean Water Act, states, territories, and authorized tribes are required to develop lists of impaired waters. These impaired waters do not meet water quality standards that states, territories, and authorized tribes have set for them, even after point sources of pollution have installed the minimum required levels of pollution control technology. The law requires that these jurisdictions establish priority rankings for waters on the lists and develop TMDLs for these waters.
Current Lists of Impaired Waters - AK, ID, OR, WA
EPA 303(d) and TMDL Guidance and Regulations
Guidance and Status of 2010 303(d) Listing of Impaired Waters
Guidance and Status of 2008 303(d) Listing of Impaired Waters
- Information Concerning 2008 Clean Water Act Sections 303(d), 305(b), and 314 Integrated Reporting and Listing Decisions - Diane Regas -- Oct. 12, 2006 (HTML | PDF 167K, 21 pages)
Other EPA Guidance and Tools
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