Municipal Separate Storm Sewer System (MS4)

The Town of Warrenton was designated as a regulated small Municipal Separate Storm Sewer System (MS4) in August 2013 and falls under the purview of the Virginia Stormwater Management Act of the Code of Virginia. This designation requires the Town to develop and implement a program to minimize the discharge of pollutants through and from the MS4 into surface waters of the Commonwealth.

The Town filed its 2022 MS4 Annual Report (PDF) & Attachments Report (PDF with the Department of Environmental Quality on October 1, 2022 for the period July 1, 2021 through June 30, 2022.

View the most current Town of Warrenton  MS4 Program Plans online (PDF) and Attachments Program Plan (PDF).

Report a Suspected MS4 Violation

Anonymously report a suspected MS4 violation, via our online form.

MS4 Annual Reports

• MS4 Annual Report - Period Ending June 30, 2014 (PDF)
• MS4 Annual Report - Period Ending June 30, 2015 (PDF)
• MS4 Annual Report - Period Ending June 30, 2016 (PDF)
• MS4 Annual Report - Period Ending June 30, 2017 (PDF)
• MS4 Annual Report - Period Ending June 30, 2018 (PDF)
• MS4 Annual Report - Period Ending June 30, 2019 (PDF)
• MS4 Annual Report - Period Ending June 30, 2020 (PDF)
• MS4 Annual Report - Period Ending June 30, 2021 (PDF)

MS4 General Permit

• 2018-2023 MS4 General Permit (PDF)
• MS4 General Permit VAR04024 (PDF)

Registration Statement

• Registration Statement - 2018 to 2023 (PDF)