St. Mary's County, Maryland — public water systems
196 active public water systems serve St. Mary's County, reporting 125K people served.
Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.
Active systems
196
Population served
125K
Community systems
37
Groundwater share
100%
Water systems in St. Mary's County
| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Lexington Park | St. Mary's | 43,030 | Community | Groundwater |
| 2 | Patuxent Naval Air Station (Navfac-Wash) | St. Mary's | 22,000 | Community | Groundwater |
| 3 | Town of Leonardtown | St. Mary's | 5,000 | Community | Groundwater |
| 4 | Country Lakes | St. Mary's | 3,016 | Community | Groundwater |
| 5 | Cedar Cove | St. Mary's | 2,728 | Community | Groundwater |
| 6 | Saint Marys College | St. Mary's | 2,200 | Community | Groundwater |
| 7 | Chopticon High School | St. Mary's | 1,845 | Non-transient non-community | Groundwater |
| 8 | Leonardtown High School | St. Mary's | 1,750 | Non-transient non-community | Groundwater |
| 9 | Wicomico Shores | St. Mary's | 1,262 | Community | Groundwater |
| 10 | Leonardtown Middle School & Forrest Tech | St. Mary's | 1,200 | Non-transient non-community | Groundwater |
| 11 | Webster Field Annex, St Inigoes (Navfac) | St. Mary's | 1,200 | Non-transient non-community | Groundwater |
| 12 | Greenbrier | St. Mary's | 1,161 | Community | Groundwater |
| 13 | Spring Ridge Middle School | St. Mary's | 1,075 | Non-transient non-community | Groundwater |
| 14 | Margaret Brent Middle School | St. Mary's | 1,050 | Non-transient non-community | Groundwater |
| 15 | Breton Bay | St. Mary's | 1,012 | Community | Groundwater |
| 16 | Lord Calvert Trailer Park | St. Mary's | 892 | Community | Groundwater |
| 17 | Bradford'S Neishyahood Market | St. Mary's | 818 | Transient non-community | Groundwater |
| 18 | Seven Eleven # 21067 Charlotte Hall | St. Mary's | 805 | Transient non-community | Groundwater |
| 19 | Point Lookout State Park North | St. Mary's | 803 | Transient non-community | Groundwater |
| 20 | Hunting Quarters | St. Mary's | 715 | Community | Groundwater |
| 21 | Rolling Acres | St. Mary's | 699 | Community | Groundwater |
| 22 | Piney Point | St. Mary's | 672 | Community | Groundwater |
| 23 | Piney Point Elementary School | St. Mary's | 665 | Non-transient non-community | Groundwater |
| 24 | Lettie Marshall Dent Elementary | St. Mary's | 650 | Non-transient non-community | Groundwater |
| 25 | St. Clements Shores | St. Mary's | 620 | Community | Groundwater |
| 26 | Charlotte Hall | St. Mary's | 615 | Community | Groundwater |
| 27 | Immaculate Conception Roman Cath Chur | St. Mary's | 614 | Transient non-community | Groundwater |
| 28 | Saint Josephs Catholic Church | St. Mary's | 602 | Transient non-community | Groundwater |
| 29 | Benjamin Banneker Elementary School | St. Mary's | 600 | Non-transient non-community | Groundwater |
| 30 | Hollywood Elementary School | St. Mary's | 600 | Non-transient non-community | Groundwater |
| 31 | Forrest Farm Subdivision | St. Mary's | 577 | Community | Groundwater |
| 32 | Laurel Ridge | St. Mary's | 560 | Community | Groundwater |
| 33 | Persimmon Hills | St. Mary's | 514 | Community | Groundwater |
| 34 | Wilderness Run | St. Mary's | 511 | Community | Groundwater |
| 35 | Potomac Speedway | St. Mary's | 510 | Transient non-community | Groundwater |
| 36 | Sacred Heart Church | St. Mary's | 502 | Transient non-community | Groundwater |
| 37 | Saint Georges Catholic Church | St. Mary's | 502 | Transient non-community | Groundwater |
| 38 | Saint Marys Fairgrounds | St. Mary's | 502 | Transient non-community | Groundwater |
| 39 | Oakville Elementary School | St. Mary's | 475 | Non-transient non-community | Groundwater |
| 40 | Patuxent Presbyterian Church | St. Mary's | 464 | Transient non-community | Groundwater |
| 41 | Dynard Elementary School | St. Mary's | 450 | Non-transient non-community | Groundwater |
| 42 | Hollywood Volunteer Fire Hall | St. Mary's | 406 | Transient non-community | Groundwater |
| 43 | Seven Eleven # 20835 Mechanicsville | St. Mary's | 403 | Transient non-community | Groundwater |
| 44 | Our Lady of the Wayside Church | St. Mary's | 402 | Transient non-community | Groundwater |
| 45 | Saint Francis Xavier Church | St. Mary's | 402 | Transient non-community | Groundwater |
| 46 | Little Flower School | St. Mary's | 380 | Non-transient non-community | Groundwater |
| 47 | Mechanicsville Elementary | St. Mary's | 350 | Non-transient non-community | Groundwater |
| 48 | Leonardtown S.H.A./ S.H.A. Maint. | St. Mary's | 336 | Non-transient non-community | Groundwater |
| 49 | Mount Zion Umc at Laurel Grove | St. Mary's | 335 | Transient non-community | Groundwater |
| 50 | Park Hall Liquors and Deli | St. Mary's | 330 | Transient non-community | Groundwater |