IOU · New Hampshire · EIA 15472
Public Service Co of NH
IOU · New Hampshire · 376K customers. According to the U.S. Energy Information Administration's EIA Form 861, reliability for 2023 shows SAIDI 669 minutes/customer.
Reliability verdict
Public Service Co of NH shows above-average chronic reliability in 2023: 84 minutes SAIDI excluding major events (669 minutes including them) across 376K customers.
- 669 min
- SAIDI 2023
- 1.50
- SAIFI 2023
- 84 min
- SAIDI ex-MED
- 376K
- Customers
Chronic reliability judged on SAIDI excluding major event days when reported (IEEE 1366). Source: EIA Form 861 · August 2026.
Signature read: long interruption minutes vs the 911 utility cohort (>258 min tercile cut).
What long-outage Public Service Co of NH filings show
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.
Based on this utility's own EIA Form 861 reliability record -- baseline (major-event- excluded) outage duration, total outage duration, and outage frequency -- each benchmarked against every reporting utility nationwide. Not a measure of electricity rates or customer service, which this portal does not track.
669 outage minutes per customer annually
Minutes without power per year (2023)
SAIDI by year (2020-2023)
Minutes per customer-year · EIA Form 861
Year-by-year SAIDI for Public Service Co of NH from the same EIA filings as the table below. Lower is better; major-event years can spike the headline figure.
Public Service Co of NH SAIDI trend
Public Service Co of NH vs the nationwide SAIDI distribution
Where this utility's headline SAIDI sits among every EIA Form 861 utility with a reported figure
669 Higher than most fewer outage minutes than 13% of 911 utilities
Utilities nationwide, banded by latest reported SAIDI (minutes)
Each bar is a band; taller bars hold more utilities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source U.S. EIA Form 861 reliability filings · August 2026
Price vs. reliability
Where Public Service Co of NH sits on price vs. reliability
Among the 781 U.S. utilities large enough to report both revenue per customer and a recent outage record, Public Service Co of NH charges more per customer than 32% of them, and is more reliable (lower SAIDI) than 14% of them, placing it in the quadrant where it pays less and is less reliable. Revenue per customer and outage minutes are independent figures: paying more does not guarantee fewer outages.
Revenue per customer: $2,256/year · Latest SAIDI: 668.5 minutes/year.
SAIDI 2023 breakdown: 668.5 minutes
Reliability Trend (2020–2023)
| Year | SAIDI (min) | SAIDI nMED | SAIFI | Customers |
|---|---|---|---|---|
| 2020 | 464.3 | 95.8 | 1.492 | 535,095 |
| 2021 | 182.7 | 96.8 | 1.066 | 539,189 |
| 2022 | 552.2 | 78.8 | 1.443 | 543,167 |
| 2023 | 668.5 | 83.7 | 1.504 | 546,919 |
SAIDI nMED = SAIDI without major event days. Source: EIA Form 861.
Service Area
Public Service Co of NH serves 244 ZIP codes in New Hampshire.
Frequently Asked Questions
How reliable is Public Service Co of NH?
Public Service Co of NH had a SAIDI of 668.5 minutes in 2023 including major weather events, but 83.7 minutes excluding them (the IEEE-standard day-to-day reliability measure, the difference points to a major storm that year rather than an ongoing problem). Excluding major weather events, this is below the national average, indicating above-average reliability.
What type of utility is Public Service Co of NH?
Public Service Co of NH is classified as a IOU serving New Hampshire.
How many customers does Public Service Co of NH serve?
Public Service Co of NH serves approximately 376,359 customers in New Hampshire.
How has Public Service Co of NH's reliability changed over time?
Public Service Co of NH has 4 years of reliability data (2020-2023). SAIDI has held roughly steady across these years. Review the trend table above for year-by-year detail.
Utility Profile
- Type
- IOU
- State
- New Hampshire
- Customers
- 376,359
- Annual Revenue
- $0.85B
- EIA ID
- 15472
Explore
Utilities with similar EIA profiles
Two cross-state peer sets for Public Service Co of NH. Same-state SAIDI neighbors stay in Read-with below; these neighborhoods are nearest other-state utilities with at least 10,000 reported customers.
Similar customer count
Nearest utilities by Form 861 customers (376K here), outside New Hampshire.
Similar chronic SAIDI
Nearest utilities by latest SAIDI minutes (668.5 here), outside New Hampshire, excluding the customer-peer set.
Source: U.S. Energy Information Administration Form 861 annual electric power industry survey · ZIP service territory: OpenEI. Disclaimer: informational only, not professional advice. See full disclaimer · methodology.