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State directory · dataset 2026.08
Browse 27 indexed systems and see how frequently the directory identified public payment, fee, leak, assistance, and emergency information. Coverage describes the research record—not utility performance.
Maryland research snapshot
85%
Online portal identified
23 of 27
22%
Public fee detail
6 of 27
41%
Leak policy detail
11 of 27
26%
Assistance detail
7 of 27
30%
Emergency route
8 of 27
Municipal Department
Service area: Baltimore City and the Baltimore City Department of Public Works regional water-service area
Population: 1,600,000 people (EPA SDWIS PWS ID MD0300002; active community water system record; Baltimore DPW describes the broader system as serving more than 1.8 million customers across Baltimore City and surrounding counties)
Public Water Authority
Service area: Montgomery County and Prince George’s County, Maryland
Population: Approximately 1.9 million residents through about 475,000 customer accounts in Montgomery and Prince George’s counties; Maryland’s public-water tracking profile identifies WSSC as serving about 1,900,000 people.
Municipal Department
Service area: Glen Burnie, Broadneck, and Anne Arundel County public-water service areas
Population: 290,606 people (EPA SDWIS PWS ID MD0020017; 2026 active CWS record).
Municipal Department
Service area: Howard County
Population: 286,158 people (EPA SDWIS PWS ID MD0130002; 2026 active CWS record).
Public Water Authority
Service area: Prince George's and Montgomery Counties
Population: 1,900,000 people (EPA SDWIS active CWS PWS MD0150005)
Public Water Authority
Service area: Harford County water and sewer service districts
Population: 104,567
Municipal Department
Service area: Hagerstown
Population: Approximately 92,200 people in the City of Hagerstown Community Water System queue
Municipal Department
Service area: Waldorf and Charles County, Maryland
Population: 84,296 people
Municipal Department
Service area: Frederick County
Population: 74,911 people served according to the EPA queue; Frederick County DWSU reports approximately 39,000 water/sewer accounts across staggered county service areas.
Municipal Department
Service area: Crofton-Odenton service area
Population: 62,986 people (EPA SDWA queue estimate for MD0020008)
Municipal Department
Service area: Fort George G. Meade
Population: 62,234 people (EPA SDWA queue estimate for MD0020012)
Municipal Department
Service area: City of Frederick
Population: 54,000 people (EPA SDWA queue estimate for MD0100015)
Municipal Department
Service area: City of Rockville
Population: 52,000 people (EPA SDWA queue estimate for MD0150003)
Municipal Department
Service area: Westminster
Population: 35,256 people (EPA SDWA queue estimate for MD0060015)
Municipal Department
Service area: Annapolis
Population: 35,000 people (EPA SDWA queue estimate for MD0020001)
Municipal Department
Service area: Salisbury
Population: 30,343 people (EPA SDWA queue estimate for MD0220004)
Municipal Department
Service area: Ocean City
Population: 30,000 people (EPA SDWA queue estimate for MD0230003)
Municipal Department
Service area: Frederick
Population: 28,000 people (EPA SDWA queue estimate for MD0002388)
Public Water Authority
Service area: Millersville / Broad Creek
Population: 26,033 people (EPA SDWIS 2026Q2 estimate for MD0020004)
Municipal Department
Service area: Bowie
Population: 25,000 people (EPA SDWIS 2026Q2 estimate for MD0160002)
Public Water Authority
Service area: Westminster / Freedom District
Population: 24,867 people (EPA SDWIS 2026Q2 estimate for MD0060002)
Municipal Department
Service area: Patuxent River
Population: 22,000 people (EPA SDWIS 2026Q2 estimate for MD0180022)
Municipal Department
Service area: Aberdeen
Population: 18,006 people (EPA SDWIS 2026Q2 estimate for MD0120001)
Municipal Department
Service area: ABINGDON
Population: 104567 people (EPA SDWIS 2026Q2 active CWS estimate for MD0120016)
Municipal Department
Service area: Service area listed in EPA SDWIS
Population: 84296 people (EPA SDWIS 2026Q2 active CWS estimate for MD0080049)
Municipal Department
Service area: FREDERICK
Population: 74911 people (EPA SDWIS 2026Q2 active CWS estimate for MD0100030)
Municipal Department
Service area: CALIFORNIA
Population: 43030 people (EPA SDWIS 2026Q2 active CWS estimate for MD0180007)
Maryland directory notes
This state hub brings together 27 indexed community water systems, from city departments and public authorities to investor-owned systems and smaller regional providers. A service area may cross municipal boundaries, so use the provider name and service address on your bill when choosing a profile.
The most important distinction is between a directory listing and an official account channel. US Water Bill Pay provides a structured starting point; the utility’s own payment portal, published rate schedule, customer-service office, and mailed notice control your account. Compare the payment route, billing frequency, emergency number, and customer-protection notes before relying on a page for a time-sensitive decision.
If you are helping a household with a high bill, leak, or delinquency notice, open the utility profile and review the payment, shut-off, and leak-adjustment guides together. Keep the bill, account number, confirmation receipts, repair records, and notice dates available when speaking with the provider.
