Editor: Katerine G., Editor & Data Researcher · Research & publishing: Electric Consumer Editorial Team · Data retrieved · Sources named on this page: EIA-861, EIA retail sales · How we got these numbers · Report an error
Roughly 345,877 Connecticut accounts belong to United Illuminating Co, classed by EIA as investor owned; the residential count is 312,291. Its home price moved +58.5% from 2015 to 2024, 21.2 points faster than Connecticut.
United Illuminating Co: 561 kWh a month costs roughly $174 in energy at 31.06 ¢/kWh, +8.1% on the Connecticut average of 28.75 ¢.
Its home price moved +58.5% from 2015 to 2024, 21.2 points faster than Connecticut.
The record that sets United Illuminating Co apart is the path of its home price: 19.60 ¢ in 2015, 31.07 ¢ in 2024. That is +58.5%, while the Connecticut average went +37.3%, so this utility climbed faster by 21.2 points.
Among Connecticut utilities with 20,000+ homes it stood 3rd cheapest of 3 in 2015 and is 3rd of 3 in 2024, the same place.
| United Illuminating Co, 2024 | Home | Business | Bill | SAIDI |
|---|---|---|---|---|
| United Illuminating Co | 31.06 ¢/kWh | 14.70 ¢/kWh | $174at 561 kWh | 49 minSAIDI |
| Connecticut average against this company, which is 3 of 3 on price | -2.31 ¢/kWhcompany 8.1% above | +6.51 ¢/kWhcompany 30.7% below | -$13a month at 561 kWh | +28 mincompany 28 below |
| Connecticut Light & Power CoLowest in this table | 25.31 ¢/kWhcompany 22.8% above | 13.62 ¢/kWhcompany 7.9% above | $14232 less than company | 77 mincompany 28 below |
Compare 6 Connecticut companies
No 2025 early-release row for United Illuminating Co; 2024 stays the latest year.
EIA's early release leaves United Illuminating Co out for 2025. Its newest record stays 2024: 31.06 ¢/kWh across 312,291 home accounts and 49 minutes of SAIDI.
United Illuminating Co serves 312,291 homes in Connecticut. At 561 kWh a month that is about 137 kg of CO₂, or 1,643 kg a year, at the Connecticut plant rate, state generation and not this utility: Connecticut generation mix.
19.60 ¢ in 2015, 31.06 ¢ in 2024 (+58.5%); Connecticut 20.94 to 28.75 ¢.
| Year | United Illuminating Co | Gap to Connecticut residential | Gap to U.S. residential |
|---|---|---|---|
| 2015 | 19.60 | -1.34 | +6.95 |
| 2016 | 18.55 | -1.46 | +6.00 |
| 2017 | 20.25 | -0.04 | +7.36 |
| 2018 | 21.94 | +0.74 | +9.07 |
| 2019 | 21.96 | +0.09 | +8.95 |
| 2020 | 23.20 | +0.49 | +10.05 |
| 2021 | 23.00 | +1.09 | +9.34 |
| 2022 | 22.29 | -2.32 | +7.25 |
| 2023 | 29.15 | -0.73 | +13.15 |
| 2024 | 31.07 | +2.32 | +14.59 |
10 rows from EIA retail sales.
CSV49.2 min, 0.49x the median reporter, rank 158 of 673.
United Illuminating Co, Reliability: EIA-861 survey.
CSVFrom 19.60 ¢ in 2015 to 31.07 ¢ in 2024, a move of +58.5%: United Illuminating Co outpaced its state (+37.3%) by 21.2 points, and +28.2 points against the U.S. Full-service customers alone pay 34.04 ¢ per EIA, against 31.07 ¢ for all rows: buyers of energy elsewhere pay United Illuminating Co for delivery only. United Illuminating Co's sharpest move came in 2023, +30.8%. The latest year is the high at 31.07 ¢; the low was 18.55 ¢ (2016). 2024: +6.6% here, -3.8% for the Connecticut average. United Illuminating Co filed SAIDI in only 1 year of this window, too few for a trend. United Illuminating Co has 2 cheaper and 0 higher-priced Connecticut peers among 3 with 20,000+ homes. Next cheaper, Connecticut Light & Power Co, bills 25.31 ¢ (-5.76).
Customers pay 8.1% over the Connecticut average and get some return: 49 outage minutes, 51% under the national median.
Home accounts at United Illuminating Co went from 287,894 in 2015 to 312,291 in 2024, +8.5%. Business customers paid 0.47 times the home price in 2024 (14.70 against 31.07 ¢); the ratio was 0.50 in 2015.
Home rates at United Illuminating Co climbed from 16.69 ¢ in 2013 to 31.07 ¢ in 2024 (+86.1%), or 23.07 ¢ to 31.88 ¢ in 2025 dollars (+38.2%). Over 12,000 kWh a year the real price meant $2,768 in 2013 and $3,826 in 2024. Of 11 Connecticut utilities with 1,000+ home accounts in 2024, United Illuminating Co stood 11th cheapest (8th of 9 in 2013).
United Illuminating Co: 31.88 ¢ in 2025 dollars (solid) and 31.07 ¢ as billed (dashed) in 2024.
| Year, United Illuminatin | ¢ billed | ¢ in 2025 $ | Price place, United Illumin | SAIDI min | SAIFI | SAIDI place, United Illumin | Connecticut median SAIDI |
|---|---|---|---|---|---|---|---|
| 2013 | 16.69 | 23.07 | 8 of 9 | 58 | 0.63 | 3 of 5 | 58 |
| 2014 | 17.65 | 24.01 | 8 of 10 | – | – | – | – |
| 2015 | 19.60 | 26.63 | 9 of 10 | – | – | – | – |
| 2016 | 18.55 | 24.88 | 10 of 11 | – | – | – | – |
| 2017 | 20.25 | 26.60 | 12 of 12 | – | – | – | – |
| 2018 | 21.94 | 28.13 | 13 of 13 | – | – | – | – |
| 2019 | 21.96 | 27.66 | 14 of 14 | – | – | – | – |
| 2020 | 23.20 | 28.86 | 10 of 11 | – | – | – | – |
| 2021 | 23.00 | 27.32 | 10 of 11 | – | – | – | – |
| 2022 | 22.29 | 24.52 | 9 of 11 | – | – | – | – |
| 2023 | 29.15 | 30.80 | 11 of 11 | – | – | – | – |
| 2024 | 31.07 | 31.88 | 11 of 11 | 49 | 0.62 | 2 of 5 | 77 |
United Illuminating Co, EIA utility 19497: EIA-861, CPI-U.
CSV| United Illuminating Co sector | Accounts | Rate ¢/kWh | Gap to Connecticut ¢/kWh |
|---|---|---|---|
| Residential | 312,291 | 31.06 | +2.31 |
| Commercial | 32,665 | 14.70 | -6.51 |
| Year | Home accounts, United Illuminating Co | Home ¢ | Business ¢ | Ratio | SAIDI | SAIFI |
|---|---|---|---|---|---|---|
| 2015 | 287,894 | 19.60 | 9.73 | 0.50 | No data | No data |
| 2016 | 298,188 | 18.55 | 8.94 | 0.48 | No data | No data |
| 2017 | 300,557 | 20.25 | 9.87 | 0.49 | No data | No data |
| 2018 | 302,818 | 21.94 | 11.09 | 0.51 | No data | No data |
| 2019 | 304,670 | 21.96 | 10.83 | 0.49 | No data | No data |
| 2020 | 306,846 | 23.20 | 11.44 | 0.49 | No data | No data |
| 2021 | 309,016 | 23.00 | 10.77 | 0.47 | No data | No data |
| 2022 | 310,104 | 22.29 | 11.32 | 0.51 | No data | No data |
| 2023 | 310,513 | 29.15 | 11.89 | 0.41 | No data | No data |
| 2024 | 312,291 | 31.07 | 14.70 | 0.47 | 49 | 0.62 |
| Utility near United Illuminating Co on price | SAIDI min, gap to United Illuminating Co | Home ¢, gap to United Illuminating Co | Gap % to United Illuminating Co | Accounts, United Illuminating Co = 1 |
|---|---|---|---|---|
| 1. Town of Wallingford | No data | -15.41 | -49.6% | 0.07 |
| 2. Connecticut Light & Power Co | +28 | -5.76 | -18.5% | 3.73 |
| 3. United Illuminating Co (this utility) | 49 | 31.06 | - | 1.00 |
| Class at United Illuminating Co | Accounts | Of United Illuminating Co accounts | Of United Illuminating Co MWh sold | kWh a year per United Illuminating Co account |
|---|---|---|---|---|
| Residential | 312,291 | 90.3% | 43.4% | 6,729 |
| Commercial | 32,665 | 9.4% | 48.5% | 71,865 |
| Industrial and other | 920 | 0.27% | 8.1% | 428,336 |
| United Illuminating Co and its neighbours on price | SAIDI min, gap to United Illuminating Co | Home ¢, gap to United Illuminating Co | Accounts, United Illuminating Co = 1 |
|---|---|---|---|
| 1. Central Maine Power Co (ME) | +166 | -8.69 | 1.90 |
| 2. United Illuminating Co (CT, this utility) | 49 | 31.06 | 1.00 |
| Measure | United Illuminating Co | Connecticut context | United Illuminating Co detail |
|---|---|---|---|
| United Illuminating Co home meters on AMI | 91.4% | Connecticut 21.7% | 290,581 of 317,752 meters |
| Home meters, AMR (drive-by read) | 27,171 | Connecticut figure not published | 8.6% of meters |
| Homes with daily digital access | 312,290 | Connecticut figure not published | 100% of the 312,291 home accounts |
| Time-of-use rate for United Illuminating Co homes | Offered | 2 of 6 Connecticut utilities offer one | 71,280 homes on dynamic pricing, 22.82% of 312,291 |
| Net-metered installations | 24,137 | 98% residential | 75.6 homes per 1,000 accounts, 10.5 kW average |
| kWh | Share of a 561 kWh month | Cost a month at 31.06 ¢ | vs U.S. | Cost a year |
|---|---|---|---|---|
| 250 | 45% | $77.66 | +$36.46 | $932 |
| 500 | 89% | $155.32 | +$72.92 | $1,864 |
| 750 | 134% | $232.99 | +$109.39 | $2,796 |
| 1,000 | 178% | $310.65 | +$145.85 | $3,728 |
| 1,500 | 267% | $465.97 | +$218.77 | $5,592 |
| 2,000 | 357% | $621.30 | +$291.70 | $7,456 |
| Measure, United Illuminating | No events | All events | Converted |
|---|---|---|---|
| SAIDI minutes | 49.2 | 121.8 | 0.82 h |
| SAIFI interruptions | 0.620 | 0.790 | 1.61 yr apart |
| CAIDI minutes | 79.4 | 154.2 | 1.32 h |
2 Connecticut counties, region NPCC:
345,877 accounts in 2024: residential 312,291, commercial 32,665, industrial 920.
In 2024 homes paid 31.06 cents; against the Connecticut average that is +8.1%.
SAIDI 49.2 min and SAIFI 0.62 a year, major events excluded; ratio to the national median 0.49, CAIDI 79 min.
24,137 installations with 253.8 MW, of which residential installations number 23,614.
561 kWh at 31.06 cents comes to about $174, energy only.
Rank 3 of 3 in Connecticut on price, +8.1% against the state average; 2 charge less than 31.06 ¢.
Homes take 43.4% of 4,842,995 MWh, commercial accounts 48.5%, industrial and other 8.1%; the 32,665 commercial accounts use 71,865 kWh each, 10.7 times a home.
290,581 of 317,752 home meters are AMI, 91.4%. United Illuminating Co offers a home time-of-use rate; 71,280 customers use dynamic pricing, 22.82% of its homes.
3rd cheapest of 3 in 2015, 3rd of 3 in 2024; its price rose 58.5% while Connecticut rose 37.3%.
Not yet: 31.06 cents and 49 SAIDI minutes (2024) remain the newest United Illuminating Co record.
Home prices nearest to United Illuminating Co at 31.06 ¢/kWh in 2024, among companies with a page here, any state.
4 home plan records, energy charges: 11.6 to 49.1 ¢/kWh.
Who offers time-of-use and tiered rates (17 Apr 2026 snapshot).