Supplier Information - Eversource Gas of Massachusetts

For more information regarding electronic bulletin board access, telemetering/nontelemeters, supplier pools, nominations/confirmations, supplier billing, OFO/critical day information, please contact:

Ewa Lewczuk

For information regarding EDI and customer transactions (enrollments, changes, drops, use history requests), please contact:

Emilie Smith 


Regulatory Information

Capacity Assignment Procedures

Gas Allowance Factor

Eversource’s Gas Allowance Factor for EGMA in Massachusetts will change effective November 1, 2022 from 0.9% to 2.6%.

Holiday Schedule

  • New Year's Day - January 1 *
  • Martin Luther King Day - Third Monday of January
  • President's Day - Third Monday in February
  • Memorial Day - Last Monday in May
  • Independence Day - July 4 *
  • Labor Day - First Monday in September
  • Columbus Day - Second Monday in October
  • Veterans' Day - November 11 *
  • Thanksgiving Day - When appointed
  • Christmas - December 25 *

* If this holiday falls on a Sunday the following day will be observed as the holiday.

Other Information

Looking for NSTAR gas? 

See supplier information for the NSTAR gas territory