Gas Pipeline Safety in Maryland

Gas Infrastructure in Maryland

Maryland's gas distribution network is anchored by two major utilities: BGE (Baltimore Gas and Electric), which serves the Baltimore metro and surrounding counties, and Washington Gas, which covers much of the Washington, D.C. suburbs in Montgomery and Prince George's counties. Baltimore's distribution system includes some of the oldest gas infrastructure on the East Coast, with segments of the network dating back many decades. The state's geographic diversity — from dense urban rowhouse neighborhoods to rural western Maryland — creates a wide range of infrastructure conditions and maintenance challenges.

Key Risk Factors

Baltimore's aging cast iron and bare steel distribution mains represent the most significant long-term safety challenge, as these materials are more prone to corrosion and leak-prone joints than modern plastic pipe. The high density of the Baltimore urban core means that leaks can accumulate in confined spaces — basements, vaults, and building foundations — before surfacing, increasing the potential severity of any single incident. The proximity to Washington, D.C. also means a high volume of utility excavation and construction activity in the Maryland suburbs, elevating excavation damage risk.

Incident Patterns

Maryland has experienced incidents tied to corrosion in older Baltimore-area mains and service lines, as well as excavation-related strikes in the rapidly developing suburban counties. Historic urban neighborhoods with narrow streets and tightly packed rowhouses pose particular challenges for pinpointing and safely repairing underground leaks. You can explore all incidents in Maryland on our site.

Regulatory Oversight

Gas utilities in Maryland are regulated by the Maryland Public Service Commission, which sets pipeline safety requirements and oversees utility compliance programs. Maryland uses the Miss Utility system for underground utility marking — dial 811 or submit a locate request online at least two business days before any excavation to protect buried gas lines and other utilities.

Stay Safe

• Learn the signs of a gas leak
• Know what to do if you smell gas
• Understand how gas leak detectors work