Baltimore city County, Maryland — public water systems

13 active public water systems serve Baltimore city County, reporting 1.6M people served.

Dataset updated July 2026 . Source: EPA SDWIS/ECHO, refreshed quarterly.

Active systems

Population served

1.6M

Community systems

Groundwater share

Water systems in Baltimore city County

Active public water systems in Baltimore city County, Maryland
#	Water system	County	Population served	Type	Source
1	City of Baltimore	Baltimore city	1,600,000	Community	Surface water
2	Johns Hopkins University	Baltimore city	2,058	Community	Not reported
3	Johns Hopkins Hospital	Baltimore city	2,000	Non-transient non-community	Purchased surface water
4	Johns Hopkins Bayview Medical Center	Baltimore city	950	Non-transient non-community	Purchased surface water
5	Mount Washington Pediatric Hospital	Baltimore city	870	Non-transient non-community	Purchased surface water
6	Umd Rehabilitation and Orthopedic Inst.	Baltimore city	860	Non-transient non-community	Purchased surface water
7	University of Maryland Medical Center	Baltimore city	854	Non-transient non-community	Purchased surface water
8	Keswick Multi-Care Center	Baltimore city	575	Community	Purchased surface water
9	Ummc - Midtown Campus Armory Building	Baltimore city	500	Non-transient non-community	Purchased surface water
10	Loch Raven Va Medical Center	Baltimore city	330	Non-transient non-community	Purchased surface water
11	Grace Medical Center	Baltimore city	325	Non-transient non-community	Purchased surface water
12	Manor Care Health Services Roland Park	Baltimore city	216	Non-transient non-community	Purchased surface water
13	The Neighborhoods at St. Elizabeth	Baltimore city	162	Community	Purchased surface water