Home | Regulation & Admin Of Communications | 1 | 2 | 3 | 4 | 5 | 6 | Harford County Water Treatment 3340 Abingdon Rd Abingdon, MD 21009 Phone : (410) 638-3939 Brunswick Wastewater Treatment 1 W Potomac St Brunswick, MD 21716 Phone : (301) 834-7737 Emmitsburg Town Office 300 S Seton Ave # A Emmitsburg, MD 21727 Phone : (240) 629-6300 Pittsville Water Treatment 7505 Gumboro Rd Pittsville, MD 21850 Phone : (410) 835-2386 Patapsco Waste Water Treatment 3501 Asiatic Ave Baltimore, MD 21226 Phone : (410) 396-2800 Water Treatment Facilities 1980 N Market St Frederick, MD 21701 Phone : (301) 694-1754 Linganore Water Treatment Plnt 6436 Plant Rd Frederick, MD 21701 Phone : (301) 694-1480 Monocacy Water Treatment Plant 1950 N Market St Frederick, MD 21701 Phone : (301) 694-1188 Frederick Water & Sewer Department 101 N Court St Frederick, MD 21701 Phone : (301) 694-1421 Waste Water Treatment Plant 100 Treatment Plant Rd Frederick, MD 21701 Phone : (301) 694-1036