February 23, 2017

Mason MS4 Program

Mason’s Municipal Separate Storm Sewer System (MS4) permit is mandated by Clean Water Act and by EPA stormwater regulations. Virginia Department of Environmental Quality (DEQ) administers MS4 permits as part of the Virginia Stormwater Management Program permit program. Masons MS4 permit covers Fairfax Campus at Fairfax County and Science and Technology Campus at Prince William County.

Mason’s MS4 Permit requires Mason to comply with the conditions set forth in the permit. These conditions include six minimum control measures (MCMs), TMDL special conditions and general conditions.

The Effective MS4 Permit


Mason seeks comments on the Chesapeake Bay Action Plan

A Total Maximum Daily Load TMDL for the Chesapeake Bay was established by the U.S. Environmental Protection Agency (EPA) in 2010 requiring states and localities to remove specific pollutants from storm water runoff before the water enters local streams and rivers that drain into the Chesapeake Bay. The level of pollutants allowed to be discharged to the Chesapeake Bay is called a Total Maximum Daily Load (TMDL).

Mason is required to develop Chesapeake Bay TMDL Action Plans that show how Mason intends to meet the three milestones: a 5 percent reduction in nitrogen, phosphorus and suspended solids by June 30, 2018, additional 35% reduction by June 30, 2023, and the final 60% by June 30, 2028.

Mason implemented an urban stream restoration project as the first phase TMDL action plan and exceeded the 5% reduction goal prior to June 30, 2018.

Mason developed a second phase TMDL action plan that shows how it intends to meet the second of three milestones: additional 35% reduction in nitrogen, phosphorus and suspended solids by June 30, 2023.

Faculty, students and general public are invited to submit comments about the George Mason University draft Chesapeake Bay TMDL Action Plan by February 15, 2019. Read more about the plan below

Please submit written comments to Jane (Zhongyan) Xu at 4400 University Drive MS 1E4, Fairfax, VA  22030 or zxu8@gmu.edu

MS4 Program Plan and Annual Reports

For any questions or concerns, please contact the George Mason Land Development Team at MasonLD@gmu.edu.