The guidance documents listed below are in PDF format.
||Guidance for Exceptional State Waters Designations in Antidegradation Policy Section of Virginia Water Quality Standards Regulation (9 VAC 25-260-30.A.3)
||Guidance of Application of Public Water Supply Designations
||Interpretation of Fecal Coliform Bacteria and Mixing Zones
||Water Quality Standards Interpretation of Biologically Based Flows, Low Flow Application and Mixing Zones
||New Standards - Interpretations