Green Mountain Power Corp

What This Utility Data Tells You

Green Mountain Power Corp is an investor-owned utility operating in Vermont under EIA identifier 7601. It reports service to approximately 273,285 customer accounts and generated about $0.70 billion in annual electric revenue, with a service footprint spanning 225 ZIP codes. Because it is investor-owned, the state public utility commission oversees its rate cases and reliability performance rather than a local board.

In 2023, the average Green Mountain Power Corp customer experienced 782.4 minutes of power interruptions, a measure known as SAIDI, or System Average Interruption Duration Index. Excluding major weather events from that total, that falls inside the typical 120–180 minute national benchmark, in line with what most U.S. distribution utilities report. The SAIFI figure, which tracks average outage events per customer, came in at 2.51 for the same period, meaning customers statistically saw about 3 distinct interruptions that year. Strip out major event days (hurricanes, ice storms) and SAIDI falls to 223.8 minutes; the difference from the headline 782.4 shows how much of the outage total came from weather rather than everyday grid issues.

Green Mountain Power Corp has 4 years of continuous EIA reporting on file (2020–2023), enough to read a real trend rather than a single-year snapshot. SAIDI climbed from 270.0 to 782.4 minutes over that window, a shift that can point to worsening weather exposure or delayed grid modernization.