Municipal · Connecticut · EIA 7716
Groton Dept of Utilities - (CT)
Municipal · Connecticut · 14K customers. According to the U.S. Energy Information Administration's EIA Form 861, reliability for 2023 shows SAIDI 120 minutes/customer.
Reliability verdict
Groton Dept of Utilities - (CT) shows near-benchmark chronic reliability in 2023: 120 minutes SAIDI excluding major events across 14K customers.
- 120 min
- SAIDI 2023
- 1.04
- SAIFI 2023
- 120 min
- SAIDI ex-MED
- 14K
- Customers
Chronic reliability judged on SAIDI excluding major event days when reported (IEEE 1366). Source: EIA Form 861 · August 2026.
Signature read: mid-cohort SAIDI between the 96 and 258 minute tercile cuts.
What mid-pack Groton Dept of Utilities - (CT) filings show
Groton Dept of Utilities - (CT) is a municipally-owned utility operating in Connecticut under EIA identifier 7716. It reports service to approximately 13,850 customer accounts and generated about $0.06 billion in annual electric revenue, with a service footprint spanning 5 ZIP codes. Municipal ownership means a local board or city council typically oversees this utility, and it is exempt from federal income tax.
In 2023, the average Groton Dept of Utilities - (CT) customer experienced 120.1 minutes of power interruptions, a metric called SAIDI (System Average Interruption Duration Index). That lands within the usual 120–180 minute national benchmark band, roughly on par with typical U.S. distribution-utility performance. Over the same period, SAIFI (outage events per customer) was 1.04, putting the typical customer at roughly 1 distinct interruption that year. Excluding major event days (hurricanes, ice storms), SAIDI drops to 120.1 minutes, the gap between that figure and the headline 120.1 reveals how much weather, not day-to-day infrastructure, drove outages.
With 4 consecutive years of EIA data (2020–2023), Groton Dept of Utilities - (CT)'s reliability record can be judged on trend rather than one isolated year. SAIDI climbed from 66.4 to 120.1 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.
120 minutes per customer per year
Annual minutes without electric service (2023)
SAIDI by year (2020-2023)
Minutes per customer-year · EIA Form 861
Year-by-year SAIDI for Groton Dept of Utilities - (CT) from the same EIA filings as the table below. Lower is better; major-event years can spike the headline figure.
Groton Dept of Utilities - (CT) SAIDI trend
Groton Dept of Utilities - (CT) vs the nationwide SAIDI distribution
Where this utility's headline SAIDI sits among every EIA Form 861 utility with a reported figure
120 Lower than most fewer outage minutes than 60% 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 Groton Dept of Utilities - (CT) sits on price vs. reliability
Among the 781 U.S. utilities large enough to report both revenue per customer and a recent outage record, Groton Dept of Utilities - (CT) charges more per customer than 96% of them, and is more reliable (lower SAIDI) than 64% of them, placing it in the quadrant where it pays more and is more reliable. Revenue per customer and outage minutes are independent figures: paying more does not guarantee fewer outages.
Revenue per customer: $4,692/year · Latest SAIDI: 120.1 minutes/year.
SAIDI 2023 breakdown: 120.1 minutes
Reliability Trend (2020–2023)
| Year | SAIDI (min) | SAIDI nMED | SAIFI | Customers |
|---|---|---|---|---|
| 2020 | 66.4 | 31.5 | 1.010 | 14,292 |
| 2021 | 229.3 | 83.3 | 1.740 | 13,857 |
| 2022 | 32.0 | 17.1 | 0.550 | 14,149 |
| 2023 | 120.1 | 120.1 | 1.040 | 14,149 |
SAIDI nMED = SAIDI without major event days. Source: EIA Form 861.
Service Area
Groton Dept of Utilities - (CT) serves 5 ZIP codes in Connecticut.
Frequently Asked Questions
How reliable is Groton Dept of Utilities - (CT)?
Groton Dept of Utilities - (CT) had a SAIDI of 120.1 minutes in 2023. Excluding major storm impacts, this tracks roughly with the national average.
What type of utility is Groton Dept of Utilities - (CT)?
Groton Dept of Utilities - (CT) is classified as a Municipal serving Connecticut.
How many customers does Groton Dept of Utilities - (CT) serve?
Groton Dept of Utilities - (CT) serves approximately 13,850 customers in Connecticut.
How has Groton Dept of Utilities - (CT)'s reliability changed over time?
Groton Dept of Utilities - (CT) 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
- Municipal
- State
- Connecticut
- Customers
- 13,850
- Annual Revenue
- $0.06B
- EIA ID
- 7716
Explore
Utilities with similar EIA profiles
Two cross-state peer sets for Groton Dept of Utilities - (CT). 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 (14K here), outside Connecticut.
Similar chronic SAIDI
Nearest utilities by latest SAIDI minutes (120.1 here), outside Connecticut, 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.