SAIDI
457 min per year
Yearly outage minutes, on average (2023)
City of Norwich - (CT) is a municipally-owned utility operating in Connecticut under EIA identifier 13831. It reports service to approximately 20,808 customer accounts and generated about $0.07 billion in annual electric revenue, with a service footprint spanning 10 ZIP codes. Being municipally owned, the utility answers to a local board or city council rather than a state commission, and carries a federal income tax exemption.
In 2023, the average City of Norwich - (CT) customer experienced 456.9 minutes of power interruptions, the industry-standard SAIDI metric (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. SAIFI, the average number of outage events per customer, was 2.40 for the same period, so customers statistically faced roughly 2 distinct interruptions that year. Once major event days (hurricanes, ice storms) are excluded, SAIDI comes down to 153.2 minutes, and the spread against the headline 456.9 indicates how much weather, versus routine infrastructure, drove the outage total.
The EIA dataset includes 4 years of continuous reporting (2020–2023) for City of Norwich - (CT), which lets you see whether reliability is trending up or down rather than judging from a single snapshot. SAIDI has increased from 132.2 to 456.9 minutes, which may reflect either worsening weather exposure or delayed grid modernization.
SAIDI
457 min per year
Yearly outage minutes, on average (2023)
SAIFI
2.40 interruptions/yr
Average interruption count (2023)
Customers
20,808
Customers across Connecticut
457 outage minutes per customer annually
Annual minutes without electric service (2023)
| Year | SAIDI (min) | SAIDI nMED | SAIFI | Customers |
|---|---|---|---|---|
| 2020 | 132.2 | 132.2 | 0.930 | 20,564 |
| 2021 | 169.3 | 113.4 | 0.929 | 20,642 |
| 2022 | 120.5 | 120.5 | 1.010 | 20,747 |
| 2023 | 456.9 | 153.2 | 2.400 | 20,808 |
SAIDI nMED = SAIDI without major event days. Source: EIA Form 861.
City of Norwich - (CT) serves 10 ZIP codes in Connecticut.
City of Norwich - (CT) had a SAIDI of 456.9 minutes in 2023 including major weather events, but 153.2 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 storm impacts, this tracks roughly with the national average.
City of Norwich - (CT) is classified as a Municipal serving Connecticut.
City of Norwich - (CT) serves approximately 20,808 customers in Connecticut.
City of Norwich - (CT) has 4 years of reliability data (2020-2023). SAIDI has remained relatively stable over this period. Review the trend table above for year-by-year detail.
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.
Every figure on PlainUtility is rendered directly from the U.S. Energy Information Administration's Form 861 reliability data, no number is typed in by an editor. This utility's SAIDI/SAIFI figures are rendered directly from EIA Form 861 reliability files. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2020-2023.