Virginia Regulatory Town Hall
Department of Environmental Quality
State Water Control Board
Water Quality Standards [9 VAC 25 ‑ 260]
Rulemaking to Adopt Numeric Turbidity Criteria
Action 5652
General Information
Action Summary The subject matter of the rulemaking is turbidity in the Commonwealth’s surface waters. Turbidity is a measure of water clarity and the degree to which water loses its transparency. Turbidity is influenced by suspended particles such as clay, silt, sand, organic matter, plankton, and microorganisms, as well as color and dyes. Substances that produce turbidity are included in Virginia’s general criteria 9VAC25-260-20 among a list of substances to be controlled in order to, for example, avoid direct or indirect interference with designated uses of state waters. This rulemaking will address a directive by the State Water Control Board to develop numeric turbidity criteria.
Chapters Affected Only affects this chapter.
Executive Branch Review This action will go through the normal Executive Branch Review process.
RIS Project Yes  [6576]
New Periodic Review This action will not be used to conduct a new periodic review.
Stages associated with this regulatory action.
Stage ID Stage Type Status
9141 NOIRA Stage complete. Comment period ended 05/12/2021.
Contact Information
Name / Title: David Whitehurst 
Address: 1111 East Main Street, Suite 1400
P.O. Box 1105
Richmond, VA 23218
Email Address:
Phone: (804)774-9180    FAX: ()-    TDD: ()-

This person is the primary contact for this chapter.