Utility overview
- Legal name
- Columbia Gas of Maryland, Inc.
- Parent organization
- NiSource
- Ownership type
- Investor-Owned
- Utility class
- Major Regulated
Official website and contact
- Official website: Visit official website (opens in a new tab)
- Customer service: 888-460-4332
- Gas emergency: Not listed
- Email: Not listed
- Address: Not listed
Published state services
Maryland — MD
Service area: Western Maryland counties of Washington, Allegany, and Garrett (Maryland OPC).
Rate jurisdiction: Maryland Public Service Commission
Customer classes: Commercial, Residential
Last confirmed: Aug 22, 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
- Columbia Gas of Maryland Natural Gas Tariff (opens in a new tab)
Tariff · Columbia Gas of Maryland, Inc.
State-service sources
Maryland — MD
- Columbia Gas (opens in a new tab)
State Regulator Inventory · Maryland OPC
- Gas Commodity Fact Sheet July 2026 (opens in a new tab)
State Regulator Inventory · Maryland PSC
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 22, 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.