Utility overview
- 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
Back to Massachusetts — MA utilities
Eversource Gas Company of Massachusetts
Investor-Owned · Major Regulated
Official website and contact
- Official website: Visit official website (opens in a new tab)
- Customer service: 800-688-6160
- Gas emergency: Not listed
- Email: Not listed
- Address: Not listed
Published state services
Massachusetts — MA
Service area: ~335,000 natural gas customers in 66 Massachusetts communities (Eversource 2026 Form 10-K).
Rate jurisdiction: Massachusetts Department of Public Utilities
Customer classes: Commercial, Residential
Last confirmed: Aug 24, 2026
- State customer URL: Open link (opens in a new tab)
- Tariff or territory source: Open link (opens in a new tab)
Utility identity sources
- EGMA Suppliers (opens in a new tab)
Official Utility Website · Eversource
- Information on Gas Supply and Delivery Charges (opens in a new tab)
State Regulator Inventory · Mass.gov DPU
State-service sources
Massachusetts — MA
- Natural gas companies (opens in a new tab)
State Regulator Inventory · Mass.gov Gas Division
Verified utility identity
Verified means GCC confirmed utility identity, retail gas-distribution status, and state-service evidence against authoritative sources.
Confirmation status
- Last confirmed
- Aug 24, 2026
- Reconfirmation status
- Current
Directory-information notice
GCC provides directory information only. Listings are not legal advice, regulatory advice, endorsements, or guarantees of utility service eligibility.
Service-area summaries are high-level and do not guarantee service at a specific address. Contact the listed utility directly for address-level eligibility.