United Illuminating Co: average electricity price and bill
- Annual file
- Form EIA-861, 2024 final
- Monthly data
- to July 2026
The average residential price of United Illuminating Co was 28.27 cents per kilowatt-hour (kWh) in July 2026. Monthly sample, Form EIA-861M
In July 2025, the price was 35.34 cents per kWh. In July 2026, the Connecticut average was 24.16 cents per kWh. EIA marks this month as preliminary.
For 2024, the newest final year, the price was 34.04 cents per kWh.
The average monthly bill of a residential customer was $184.69 in 2024, for 543 kWh each month. The Connecticut average price was 28.75 cents per kWh in 2024. The US average price was 16.48 cents per kWh in 2024.
Average price of electricity to ultimate consumers represents the cost per unit of electricity sold and is calculated by dividing electric revenue from ultimate consumers by the corresponding sales of electricity.
The average price of electricity to ultimate consumers reported in this publication by sector represents a weighted average of consumer revenue and sales, and does not equal the per kWh rate charged by the electric power industry participant to the individual consumers.
EIA's words. Source: U.S. Energy Information Administration, Electric Power Monthly, Technical notes, section "Form EIA-861" (March 2024). "This publication" is the Electric Power Monthly.
In plain words: the average price is revenue divided by sales. It is not the rate on a rate schedule. The annual figures on this page are for 2024. Monthly data through .
Since the last EIA release: no tracked figure of United Illuminating Co changed. The record of changes starts with the next release. EIA releases and changes
Price and bill beside Connecticut, the ownership type and the US
Form EIA-861, 2024
| Figure | This utility | Investor-owned utilities, US median | Connecticut | United States |
|---|---|---|---|---|
| Average residential price (cents per kWh) | 34.04 | 16.17 | 28.75 | 16.48 |
| Average monthly bill (dollars per month) | $184.69 | $131.47 | $199.66 | $142.26 |
| Average monthly use (kWh per month) | 543 | 787 | 695 | 863 |
| Change of the price in 1 year (percent) | +2.7% | n/a | -3.8% | +3.0% |
| Change of the price in 5 years (percent) | +34.9% | n/a | +31.5% | +26.7% |
State and US figures are EIA's own averages for all customers. The ownership column is a median of utilities with 1,000 or more residential customers, from the final 2024 file.
The average monthly bill is residential revenue divided by customers and by 12 months. The use is residential sales divided by customers and by 12 months. These figures are for bundled service only.
34.04 cents per kWh, United Illuminating Co, 2024
Sales by sector
Form EIA-861, 2024
| Sector | Customers | Sales | Share of sales percent | Revenue dollars | Average price, bundled cents per kWh |
|---|---|---|---|---|---|
| Residential | 312,291 | 2.1 TWh | 43 | 652,813,100 | 34.04 |
| Commercial | 32,665 | 2.3 TWh | 48 | 345,146,300 | 24.27 |
| Industrial | 920 | 380.3 GWh | 8 | 41,839,000 | 17.56 |
| Transportation | 1 | 13.7 GWh | 0 | 1,080,200 | n/a |
Customers, sales and revenue include each service type that the utility reported. The price column uses bundled service only. Sources of energy: 5 TWh in total. The utility generated 55.7% and bought 2.2 TWh. Summer peak demand: 1,168 MW.
Price history
Form EIA-861, 2013 to 2024
United Illuminating CoConnecticut averageUS average
Table of the figures by year, 2013 to 2024
| Year | Average price cents per kWh | Connecticut average cents per kWh | Average bill dollars per month | Average use kWh per month | Residential customers | Sales, all sectors |
|---|---|---|---|---|---|---|
| 2024 | 34.04 | 28.75 | $184.69 | 543 | 312,291 | 4.8 TWh |
| 2023 | 33.16 | 29.88 | $167.24 | 504 | 310,513 | 4.8 TWh |
| 2022 | 23.55 | 24.61 | $130.52 | 554 | 310,104 | 4.9 TWh |
| 2021 | 25.19 | 21.91 | $140.92 | 559 | 309,016 | 4.9 TWh |
| 2020 | 25.97 | 22.71 | $145.39 | 560 | 306,846 | 4.8 TWh |
| 2019 | 25.23 | 21.87 | $135.12 | 536 | 304,670 | 5 TWh |
| 2018 | 25.31 | 21.20 | $143.98 | 569 | 302,818 | 5.2 TWh |
| 2017 | 23.68 | 20.29 | $128.98 | 545 | 300,557 | 5.1 TWh |
| 2016 | 22.35 | 20.01 | $128.11 | 573 | 298,188 | 5.3 TWh |
| 2015 | 24.30 | 20.94 | $148.59 | 611 | 287,894 | 5.5 TWh |
| 2014 | 21.77 | 19.75 | $132.39 | 608 | 283,420 | 5.3 TWh |
| 2013 | 20.86 | 17.55 | $125.98 | 604 | 287,518 | 5.4 TWh |
Price by month
United Illuminating CoConnecticut average
Reliability: SAIDI and SAIFI
Form EIA-861, 2024
- SAIDI with major event days: 121.8 minutes without power for each customer in 2024, about 2 hours.
- SAIDI without major event days: 49.2 minutes for each customer in 2024, 49 minutes.
- SAIFI with major event days: 0.79 interruptions for each customer in 2024.
| Figure | This utility | Connecticut, median of 6 utilities | Connecticut, EIA total | US, median of 893 utilities |
|---|---|---|---|---|
| SAIDI with major event days (minutes per customer per year) | 121.8 | 186.5 | 153.6 | 184.5 |
| SAIDI without major event days (minutes per customer per year) | 49.2 | 63.1 | 73.1 | 99.8 |
| SAIFI with major event days (interruptions per customer per year) | 0.79 | 0.85 | 0.88 | 1.40 |
| SAIFI without major event days (interruptions per customer per year) | 0.62 | 0.64 | 0.64 | 1.01 |
The utility reported these figures to EIA with the IEEE 1366 standard. Methods differ between utilities. What SAIDI and SAIFI mean
For utilities using the IEEE method, a Major Event Day is any day that exceeds a daily SAIDI threshold called Tmed. Tmed is a duration statistic calculated from daily SAIDI values from the past five years. For utilities not using IEEE methods, Major Events are self-determined by the reporting utility.
EIA's words. Source: U.S. Energy Information Administration, Electric Power Annual with data for 2024, Table 11.1, notes (October 2025).
Table of SAIDI and SAIFI by year, 2013 to 2024
| Year | SAIDI minutes, with major event days | SAIDI minutes, without major event days | SAIFI interruptions per customer, with major event days | SAIFI interruptions per customer, without major event days | Method |
|---|---|---|---|---|---|
| 2024 | 121.8 | 49.2 | 0.79 | 0.62 | IEEE 1366 |
| 2023 | 56.0 | 43.0 | 0.75 | 0.58 | Other |
| 2022 | 50.0 | 39.0 | 0.53 | 0.44 | Other |
| 2021 | 54.0 | 40.0 | 0.57 | 0.46 | Other |
| 2020 | 1,293.0 | 46.0 | 1.32 | 0.57 | Other |
| 2019 | 208.6 | 38.0 | 0.91 | 0.50 | Other |
| 2018 | 267.0 | 59.0 | 1.17 | 0.63 | Other |
| 2017 | 78.8 | 33.0 | 0.60 | 0.41 | Other |
| 2016 | 77.0 | 51.0 | 0.74 | 0.61 | Other |
| 2015 | 48.0 | 43.0 | 0.50 | 0.48 | Other |
| 2014 | 62.0 | 62.0 | 0.65 | 0.65 | Other |
| 2013 | 81.6 | 57.8 | 0.70 | 0.63 | IEEE 1366 |
Generation at plants that the utility operates
Form EIA-923, 2025
- Natural gas 94.3% 48.8 GWh
- Solar 5.7% 3 GWh
Net generation: 51.7 GWh. This is not the mix that customers get. Utilities also buy and sell power.
Counties in the service territory
Form EIA-861, 2024
The utility listed these 2 counties on Form EIA-861. A utility can serve only a part of a county on its list.
Other utilities in Connecticut
Form EIA-861, 2024
| Utility | Type | Residential customers | Average price cents per kWh | Average bill dollars per month | SAIDI minutes, with major event days | SAIDI minutes, without major event days | |
|---|---|---|---|---|---|---|---|
| Connecticut Light & Power Co | Investor-owned utility | 1,174,420 | 28.51 | $187.10 | 158.8 | 76.9 | Add |
| Town of Wallingford | Municipal utility | 21,405 | 15.65 | $129.64 | 214.1 | 37.2 | Add |
| City of Norwich | Municipal utility | 18,870 | 22.78 | $140.25 | 288.0 | 288.0 | Add |
| Groton Dept of Utilities | Municipal utility | 12,284 | 18.70 | $133.68 | 116.6 | 22.5 | Add |
| Bozrah Light & Power Company | Municipal utility | 2,434 | 19.33 | $160.78 | 277.9 | 184.1 | Add |
| Town Square EnergyEnergy only | Retail power marketer | 95,405 | n/a | n/a | n/a | n/a | Add |
| Energywell LLCEnergy only | Retail power marketer | 54,348 | n/a | n/a | n/a | n/a | Add |
| XOOM Energy Connecticut, LLCEnergy only | Retail power marketer | 12,460 | n/a | n/a | n/a | n/a | Add |
All utilities in Connecticut, Investor-owned utilities in the US
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Official channels
- Connecticut Public Utilities Regulatory AuthorityThe home page of the state utility commission of Connecticut.
- LIHEAP Clearinghouse: energy assistance office searchThe search page for local offices of the federal Low Income Home Energy Assistance Program (LIHEAP).
- EIA: Form EIA-861 annual data filesThe page of the annual files: revenue, sales, customers, reliability and service territories of each utility.
- EIA: Form EIA-861M monthly data filesThe page of the monthly files: the figures of each state and of the monthly sample of utilities.
EIA's files have no website for a utility. The state utility commission and the utility have the rate schedules.
Cite this page
Power Bill Facts. United Illuminating Co: average electricity price and bill. https://powerbillfacts.com/utility/united-illuminating-co-ct-19497/ Source: U.S. Energy Information Administration, Form EIA-861 (2024) and Form EIA-861M. Data through . Page made .
Where the figures come from
Source: U.S. Energy Information Administration. Annual figures: Form EIA-861, final release for 2024, respondent "United Illuminating Co", utility number 19497. Monthly figures of the utility: Form EIA-861M sample. State and US averages: Form EIA-861M sales and revenue workbook, through July 2026. Generation by fuel: Form EIA-923, 2025 final. These are US government works in the public domain. An error in the processing of this site is corrected at the next build: report an error.
Questions about United Illuminating Co
- How does the price of United Illuminating Co compare with other utilities?
- In 2024, 99% of the 1,230 US utilities with a price had this price or a lower price. In Connecticut, each of the 5 other utilities with a price had a lower price.
- Did the price of United Illuminating Co change?
- The average residential price was 33.16 cents per kWh in 2023 and 34.04 cents per kWh in 2024. The 2024 price was 0.88 cents per kWh higher than the 2023 price. In 2019, the price was 25.23 cents per kWh. These prices are not adjusted for inflation.
- How many minutes without power did United Illuminating Co report?
- United Illuminating Co reported 121.8 minutes (about 2 hours) without power for each customer in 2024, with major event days. Without major event days, the figure was 49.2 minutes. EIA's name for this figure is SAIDI. The utility also reported 0.79 interruptions for each customer, with major event days (SAIFI).
- Which counties does United Illuminating Co serve?
- United Illuminating Co listed Fairfield County, CT and New Haven County, CT in its service territory on Form EIA-861 for 2024. A utility can serve only a part of a county.