Any facility that serves water to 25 or more people a day for more than 60 days per year is a public water system.  The federal Safe Drinking Water Act establishes requirements for public drinking water systems, and the Maryland Department of Environment has primacy authority for enforcing the federal requirements.  Protection of drinking water involves using the best possible source and protecting that source from contamination, ensuring adequate supplies for the demand, conducting routine monitoring of water quality, regularly inspecting water treatment infrastructure, and ensuring that consumers are informed about their drinking water.

• Source Water Assessment and Wellhead Protection
• Guidance for Public Drinking Water Systems
  
• Forms for Public Drinking Water Systems
  
• Sample Schedules for Public Drinking Water Systems​
• Electronic Reporting of Drinking Water Monitoring Results
  
• Water Supply Capacity Management
• Capacity Development Resources
• Board of Waterworks and Waste Systems Operators
• Procedures for New Public Wells
  
• EPA Public Drinking Water Systems Programs
• Guidance to Water and Wastewater Systems on the Modernize Maryland Act of 2022
  

For more information, contact water.supply@maryland.gov