Official websites use .mass.gov

A .mass.gov website belongs to an official government organization in Massachusetts.
Secure websites use HTTPS certificate

A lock icon or https:// means you’ve safely connected to the official website. Share sensitive information only on official, secure websites.

Contrast Settings
We are testing UserWay, a tool that will let you change color contrast and other visual styles. Click the button below to open the settings.
If you'd like to share your feedback on this specific feature and help us make the site more accessible, please fill out this short survey.
State Organizations

2024 ESI Data

Open ZIP file, 2.06 MB, 2024 ESI Data (ZIP 2.06 MB)

Last Updated:	2025-05-07
Language:	English
Contributing Organization	Massachusetts Department of Energy Resources