Gas Utilities Directory — utility profile
Eversource Gas Company of Massachusetts
Massachusetts · Investor-Owned · Major Regulated
Utility overview
- Utility name
- Eversource Gas Company of Massachusetts
- Legal name
- Eversource Gas Company of Massachusetts (formerly Bay State Gas Company d/b/a Columbia Gas of Massachusetts)
- Parent organization
- Eversource Energy
- Ownership type
- Investor-Owned
- Utility class
- Major Regulated
- Rate jurisdiction
- Massachusetts Department of Public Utilities
- State directory
- Massachusetts utilities
- Customer classes
- Commercial, Residential
Official website and contact
- Official website
- www.eversource.com
- Customer service phone
- 800-688-6160
- Not published
Contact details are shown only where the utility publishes them.
Published state services
Massachusetts
~335,000 natural gas customers in 66 Massachusetts communities (Eversource 2026 Form 10-K).
Customer classes: Commercial, Residential
Last confirmed: August 24, 2026
State customer informationVerification sources
- EGMA Suppliers
Eversource · Official Utility Website — Distribution Service Terms and Conditions; DPU links (accessed 2026-08-24)
- Information on Gas Supply and Delivery Charges
Mass.gov DPU · State Regulator Inventory — EGMA section: Residential Non-Heating R-1, R-2; G-41 commercial rate class (accessed 2026-08-24)
- Natural gas companies
Mass.gov Gas Division · State Regulator Inventory — Names Eversource Gas Company of Massachusetts as IOU LDC (accessed 2026-08-24)