Public Service Co of NH

What This Utility Data Tells You

Public Service Co of NH is an investor-owned utility operating in New Hampshire under EIA identifier 15472. It reports service to approximately 376,359 customer accounts and generated about $0.85 billion in annual electric revenue, with a service footprint spanning 244 ZIP codes. As an investor-owned utility, it operates under state public utility commission oversight that reviews rate cases and reliability performance.

In 2023, the average Public Service Co of NH customer experienced 668.5 minutes of power interruptions, a measure known as SAIDI, or System Average Interruption Duration Index. Excluding major weather events from that total, that places this utility well below the 120–180 minute national benchmark, signaling strong grid hardening and fast restoration practices. The SAIFI figure, which tracks average outage events per customer, came in at 1.50 for the same period, meaning customers statistically saw about 2 distinct interruptions that year. Strip out major event days (hurricanes, ice storms) and SAIDI falls to 83.7 minutes; the difference from the headline 668.5 shows how much of the outage total came from weather rather than everyday grid issues.

Public Service Co of NH 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 464.3 to 668.5 minutes over that window, a shift that can point to worsening weather exposure or delayed grid modernization.