Gas Pipeline Safety in New Hampshire

Gas Infrastructure in New Hampshire

New Hampshire has a limited natural gas distribution network compared to its southern New England neighbors, with gas service concentrated in the southern tier of the state — Manchester, Nashua, Concord, and communities along the Interstate 93 and Route 3 corridors. Liberty Utilities is the dominant gas distributor in the state, serving the areas where piped gas is available. Large portions of northern and rural New Hampshire rely on propane, heating oil, or wood heat rather than piped natural gas, reflecting the historical and geographic limits of distribution infrastructure in a mountainous, low-density state.

Key Risk Factors

New Hampshire's cold winters subject its distribution infrastructure to significant seasonal stress, with deep frost penetration causing ground movement that can affect buried pipeline joints and service line connections. The state's rocky, glacially deposited soils make excavation more difficult and can complicate accurate utility locating, as rocks and ledge can shift pipe positions over time. As Liberty Utilities and other providers consider network expansion, new construction activity brings the typical risks associated with installation work in areas adjacent to existing infrastructure.

Incident Patterns

New Hampshire's low gas penetration rate keeps overall incident volume modest relative to more gas-dense states, but the incidents that do occur often involve the older portions of the distribution network in southern New Hampshire's established communities. Cold-weather service delivery challenges appear periodically, particularly during the most extreme winter cold snaps when demand peaks and temperature stress on equipment is greatest. You can explore all incidents in New Hampshire on our site.

Regulatory Oversight

Gas distribution in New Hampshire is regulated by the New Hampshire Public Utilities Commission, which oversees pipeline safety compliance and utility operations in the state. New Hampshire uses the Dig Safe notification system — call 811 or submit an online locate request at least 72 hours before any digging or excavation to have buried utilities marked at no cost.

Stay Safe

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