The Virginia Municipal Stormwater Association, Inc. (VAMSA) was formed as a statewide association of local governments that own and operate regulated municipal separate storm sewer systems (MS4s). VAMSA’s Agency Members are:

• Albemarle County
• Arlington County
• Town of Ashland
• City of Charlottesville
• City of Chesapeake
• Fairfax County
• City of Falls Church
• City of Fredericksburg
• Hanover County
• City of Harrisonburg
• Henrico County
• Loudoun County
• City of Lynchburg
• City of Norfolk
• City of Richmond
• Stafford County
• City of Virginia Beach

In addition, leading engineering and stormwater consulting firms actively participate as affiliate members to keep abreast of changing policies and to support VAMSA Agency Members with their exceptional technical expertise. The VAMSA Consultant Members are:

• AECOM
• Camp, Dresser & McKee, Inc. (CDM)
• CH2M Hill
• Greeley and Hansen
• Hazen and Sawyer
• Malcolm Pirnie
• Michael Baker Jr., Inc.
• PBS&J
• Timmons Group
• Wiley Wilson