MS4 Action Plans

Total Maximum Daily Load (TMDL) Action Plans

The City’s ’stormwater permit’, also referred to as an MS4 (Municipal Separate Storm Sewer System) permit, directs that the City develop strategies / plans to address reduction of specific pollutants.  The strategies are referred to as a Total Maximum Daily Load (TMDL) Action Plans.  The Action Plans guide the City’s pollutant run-off reduction strategy for designated ’pollutants of concern’- nitrogen, phosphorus, sediment, and bacteria.  The City has developed two Action Plans; one to address nitrogen (N), phosphorus (P), and sediment(s)- collectively referred to as the Chesapeake Bay TMDL Action Plan, Phase 2 (PDF).    

Chesapeake Bay TMDL Action Plan, Phase 2 (PDF)

Chesapeake Bay TMDL Action Plan, Phase 2; updated August 2023 (PDF)


The second plan is prepared to recognize a City strategy for addressing bacteria pollution (e.g. fecal coliform / e. coli bacterias). Bacteria presence is a measure of E. coli, an indicator of overall bacteria presence potentially in the waters. The presence of bacteria has been verified through water monitoring resulting in development of a state-level Rappahannock River TMDL Action Plan. The City is required to develop a Bacteria TMDL Action Plan, a Fredericksburg Bacteria TMDL Action Plan - FINAL 2020 (PDF) has been developed to document bacteria reduction efforts in stormwater runoff.

Fredericksburg Bacteria TMDL Action Plan - FINAL 2020 (PDF)


Comment regarding the TMDL Action Plans may be directed to-
Public Works 
Environmental Programs Manager
Scott Rae
asrae@fredericksburgva. gov