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, 511.75 KB, for PWS, Active Sources, and Contacts Spreadsheet (Rev. Dec 2022) (XLSX 511.75 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