Basic Facts

Photo of a glass of drinking water

Some basic facts concerning Maryland drinking water.

  • Maryland population: 5,884,563
  • Population served by community water systems: 5,057,812
  • Percent served by community water systems: 86%
  • Percent served by individual wells: 14%
  • Number of public water systems: 3,398
  • Number of community water systems: 474
  • Number of non-transient non-community water systems: 544
  • Number of transient non-community water systems: 2,380
  • Number of systems using surface water: 58
  • Number of systems using only groundwater: 3,340

*As of 2010

For More Information 
Please contact the Water Supply Program at or 410-537-3702​​

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The State of Maryland pledges to provide constituents, businesses, customers, and stakeholders with friendly and courteous, timely and responsive, accurate and consistent, accessible and convenient, and truthful and transparent services.

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Help Stop Fraud in State Government

The Maryland General Assembly’s Office of Legislative Audits operates a toll-free fraud hotline to receive allegations of fraud and/or abuse of State government resources. Information reported to the hotline in the past has helped to eliminate certain fraudulent activities and protect State resources.

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