Gas utilities face a structural challenge as customer electrification accelerates but the physical network remains costly to maintain. When customers switch from gas to electric heating individually across a service territory, the utility must still support most of the gas infrastructure until enough neighboring customers have abandoned it to justify retirement of specific sections. This creates situations where a shrinking customer base must bear the costs of inspections, maintenance, and replacement work on aging pipes.
California has begun addressing this through its SB 1221 process, which requires utilities to compare the costs of maintaining or replacing aging gas infrastructure against the expense of helping customers transition to zero-emission alternatives and retiring gas assets. The state has identified 151 priority neighborhood zones and established a pilot program allowing utilities to pursue projects without unanimous property owner consent. Initial utility applications are expected in April 2027. The approach represents a shift from simple demand forecasting to geographic planning that considers whether pipe replacement remains economically justified.
Massachusetts is testing a similar framework through National Grid’s proposal to convert approximately 118 customers in Winthrop and Leominster from gas to electric heating systems, enabling retirement of leak-prone gas mains. The case demonstrates why coordinated electrification becomes necessary, as individual conversions may leave gas infrastructure in service for remaining customers. Only when sufficient portions of a connected system can be closed do significant infrastructure savings materialize.
These regulatory developments reflect a fundamental distinction between individual electrification, which reduces emissions and household gas demand, and coordinated electrification, which can remove gas infrastructure entirely and associated spending. The shift also requires electric-grid planners to evaluate distribution capacity, building upgrades, and demand management alongside gas retirement decisions.
The emerging programs remain early-stage and have not yet demonstrated large-scale gas infrastructure retirement. However, they signal that regulators are moving beyond demand forecasts to directly examine which pipes warrant continued capital investment, potentially enabling electrification to reduce both gas consumption and the costs of maintaining the underlying network infrastructure.
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