Connecticut · Municipal
Groton Dept of Utilities - (CT)
18.05¢ per kWh, bundled, EIA-861 2025. Average bill $133.62 at 740.3 kWh a month, across 12,596 customers on that row.
Connecticut averaged 29.31¢/kWh and $206.46 a month. The United States averaged 17.23¢/kWh and $150.68. State and national figures come from EIA's Average Bill file.
Revenue divided by sales, EIA-861 Sales to Ultimate Customers, 2025, released October 7, 2026. Texas wires utilities come from the Delivery Companies file. The price and bill use bundled service. Customer count: 12,596, the largest residential count across service types.
Estimate a bill
The figure below is this utility's 2025 EIA residential average.
2025 EIA average
$180.50
18.05¢/kWh × 1,000 kWh. Bundled residential average, EIA-861 2025. The customer charge is already folded into this average, so it stands beside a tariff total rather than being added to it.
Annual history
| Year | ¢/kWh | Avg. bill | Avg. kWh | Customers |
|---|---|---|---|---|
| 2015 | 15.93¢ | $114.88 | 721.4 | 12,011 |
| 2016 | 16.06¢ | $109.77 | 683.3 | 11,892 |
| 2017 | 15.92¢ | $107.21 | 673.5 | 12,002 |
| 2018 | 15.67¢ | $113.14 | 721.9 | 12,096 |
| 2019 | 15.95¢ | $109.65 | 687.6 | 12,186 |
| 2020 | 15.96¢ | $112.76 | 706.5 | 12,203 |
| 2021 | 15.90¢ | $113.17 | 711.5 | 12,225 |
| 2022 | 17.68¢ | $127.34 | 720.4 | 12,244 |
| 2023 | 20.07¢ | $140.56 | 700.4 | 12,240 |
| 2024 | 18.70¢ | $133.68 | 714.7 | 12,284 |
| 2025 | 18.05¢ | $133.62 | 740.3 | 12,596 |
EIA-861, 2015–2025, using the same service type as the 2025 figure. A blank year means that service was not in the file.
Counties
New London.
EIA-861 Service Territory, 2025. A listed county is the county EIA recorded. It does not mean every address in the county is served. Open this utility in the bill calculator · Rate history tool