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7/16/2014 The 303(d) Listing Methodology public comment period has been extended to September 30, 2014.
5/30/14 The 303(d) Listing Methodology is available for public review
4/3/14 EPA approved Addendum#2 to the Jordan Lake TMDL for turbidity and high pH
1/16/14 The Draft Addendum#2 to the Jordan Lake TMDL is available for public comment
1/13/14 The Draft 2014 303(d) List is available for public comment
The Modeling and Assessment Branch is responsible for developing the list of waters not meeting water quality standards under Section 303(d) of the Clean Water Act, prioritizing impaired waters for management strategy or TMDL development, developing TMDLs, developing and reviewing water quality models for TMDLs, NPDES permitting, or management strategies, developing and reviewing hydrologic basin models for water supply planning, and special studies. Staff use computer models to simulate and evaluate surface water resources.