Agencies | Governor
Virginia Regulatory Town Hall
Department of Environmental Quality
State Water Control Board
Sewage Treatment in the Dulles Area Watershed [9 VAC 25 ‑ 401]
Guidance Documents
Chapter Information
Description The regulation provides adequate sewage treatment for the Dulles Area Watershed while simultaneously protecting water quality at drinking water intakes on the Potomac River by limiting the number of sewage treatment plants discharging to surface waters within the defined watershed to two and requiring state-of-the-science effluent requirements for the two plants.
State Authority Section 62.1-44.15 (10 ) of the Code of Virginia
Federal Authority n/a
Exempt from APA No, changes to this chapter are subject to the Administrative Process Act.
Text of Regulation Link to Virginia Administrative Code
Goals of Regulation None entered

Contact Information
Name / Title: Bryant Thomas 
Address: Northern Regional Office
13901Crown Court
Woodbridge, VA 22193
Email Address:
Telephone: (703)583-3843    FAX: (703)583-3841    TDD: ()-
Current Actions
Action Title Latest Stage Status

Past Actions
Action Title Latest Stage Status
Amendment to make technical corrections in response to periodic review conducted in 2019
This action is exempt from the executive branch review process.
Final Stage complete. This regulation became effective on 03/04/2020.
Repeal of Chapter 400 and Adoption of Chapter 401 - Dulles Area Watershed Final Stage complete. This regulation became effective on 09/22/2004.

Periodic Reviews
Last Activity Status
9/10/2019 Completed Amend