Membership

MAMSA is a statewide association of local governments that own or operate regulated municipal separate storm sewer systems (MS4s), and leading consultants that efficiently support these public entities with their technical expertise.

AGENCY MEMBERS
Aberdeen
Annapolis
Anne Arundel County
Baltimore City
Baltimore County
Berlin
Bel Air
Carroll County
Cecil County
Charles County
Easton
Frederick County
Harford County
Havre de Grace
Howard County
La Plata
Montgomery County
Perryville
Prince George’s County
Queen Anne’s County
Salisbury
St. Mary’s County
Washington County
Wicomico County

AFFILIATE MEMBERS
Montgomery County Parks

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

CONSULTANT MEMBERS
Biohabitats, Inc.
Brown and Caldwell
Dewberry
EA Engineering, Science & Technology

ASSOCIATE CONSULTANT MEMBERS
Arcadis

Bayland Consultants & Designers, Inc.
Hazen and Sawyer
HDR Engineering
KCI Technologies, Inc.
McCormick Taylor
RES
RK&K
Tetra Tech
Transystems