Water Supplier Operations

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Rules and Guidance +

310 CMR 22: The Massachusetts Drinking Water Regulations  Guidelines for Public Water Systems  Policies & Guidance  Drinking Water Standards and Guidelines  Communications to Public Water Suppliers  Operator Safety  Drinking Water Information for Building Inspectors  Development of a PFAS Drinking Water Standard  Capacity Development 

Emergencies & Preparedness +

Storm Preparedness & Emergency Response Resources  Climate Preparedness for Water Resources  Cybersecurity Advisory for Public Water Suppliers  Issuing & Lifting Drinking Water Public Health Orders  Public Notification & Emergency Contacts List 

Reporting & Public Notification +

Reporting to water supply customers

Consumer Confidence Reports  Fact Sheet: Drinking Water Public Notification  FAQs: Drinking Water Public Notification 

Open XLSX file, 452.4 KB,  PWS, Active Sources, and Contacts Spreadsheet (Rev. June 2023) (English, XLSX 452.4 KB)

Contaminants +

Drinking Water Contaminants Information for Water Suppliers  PFAS Information  Legionella 

Training +

Very small system operator  MassDEP YouTube training channel  Access the training calendar  See all training