Contact Information

Projects in the Southeast United States (Including Florida and Georgia)

Hydrologic Data Collection, Inc.
5706 Ternwater Pl.
Lithia, FL 33547

John Coffin
President and Sr. Hydrologist
USGS - Retired

Projects in Mid-Atlantic United States (Including Virginia, Maryland, Delaware, Pennsylvania, and The District of Columbia)

Hydrologic Data Collection, LLC
805 Vassar Rd.
Alexandria, VA 22314