2016 Water Quality Assessment Guidance

Final 2016 Water Quality Assessment Guidance Manual

Virginia’s 2016 Water Quality Assessment Guidance Manual (1.8 MB PDF) contains the assessment procedures and methods to be used for the development of Virginia’s 2016 §305(b)/ §303(d) Integrated (i.e. combined Water Quality Assessment and Impaired Waters) Report. The assessment guidance seeks to address all key elements of the U.S. Environmental Protection Agency (EPA) 2006 Assessment Guidance and subsequent updates current to August 2015, in addition to the assessment methodology for Chesapeake Bay Water Quality Standards established by EPA, most recently updated in the May 2010 addendum to Ambient Water Quality Criteria for Dissolved Oxygen, Water Clarity, and Chlorophyll a for the Chesapeake Bay and Its Tidal Tributaries.

Modifications have been made to the guidance document since 2014. The most notable change pertains to the process of prioritizing impaired waters for Total Maximum Daily Loads (TMDLs). A complete list of significant guidance modifications are described in Part II of the manual.

Section 62.1-44.19:5 C of the Code of Virginia requires DEQ to develop and publish the procedures used for defining and determining impaired waters and provide for public comment on the procedures. The public was invited to submit written comments from June 27, 2016 through July 27, 2016. Responses to comments received are included in the response document (783 kb PDF).

For additional information contact:

     Amanda Gray
      Virginia Department of Environmental Quality
      Water Quality Assessment Coordinator
      P.O. Box 1105
      Richmond, Virginia 23218
      Telephone (804) 698-4181
      FAX (804) 698-4032

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Virginia Department of
Environmental Quality
P.O. Box 1105
Richmond, VA 23218
(804) 698-4000


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