Connecticut data centers and electricity bills
Connecticut ranks 48th of 51 on commercial sales growth and 44th on the amount added (-0.7 TWh). Over the same years the Connecticut home price moved +34%, from 21.87 to 29.38 cents per kWh. Data centers are only part of Connecticut commercial sales, and none of this shows cause.
Connecticut commercial sales by year
Connecticut commercial sales rose fastest in 2021, up 5.0% on 2020. Commercial customers are 42% of Connecticut electricity sales in 2025.
Connecticut commercial sales, GWh
- 12,959'15
- 12,701'16
- 12,335'17
- 12,381'18
- 12,158'19
- 11,146'20
- 11,701'21
- 11,626'22
- 11,374'23
- 11,663'24
- 11,481'25
Connecticut sales and prices, 2015 to 2025
| Year | GWh | Change | Home ¢ | Business ¢ |
|---|---|---|---|---|
| 2015 | 12,959 | — | 20.94 | 15.97 |
| 2016 | 12,701 | -2.0% | 20.01 | 15.75 |
| 2017 | 12,335 | -2.9% | 20.29 | 16.06 |
| 2018 | 12,381 | +0.4% | 21.20 | 16.76 |
| 2019 | 12,158 | -1.8% | 21.87 | 16.75 |
| 2020 | 11,146 | -8.3% | 22.71 | 16.58 |
| 2021 | 11,701 | +5.0% | 21.91 | 16.46 |
| 2022 | 11,626 | -0.6% | 24.61 | 18.54 |
| 2023 | 11,374 | -2.2% | 29.88 | 19.99 |
| 2024 | 11,663 | +2.5% | 28.75 | 21.21 |
| 2025 | 11,481 | -1.6% | 29.38 | 23.11 |
Where Connecticut stands
| Measure | Connecticut | Rank |
|---|---|---|
| Commercial sales growth 2019-2025 | -5.6% | 48 of 51 |
| Commercial sales added | -0.68 TWh | 44 of 51 |
| Commercial share of sales 2025 | 41.9% | 11 of 51 |
| Home price change 2019-2025 | +34.3% | 16 of 51 |
Large-load tariffs for Connecticut
None of the 15 entries on our list names Connecticut. That does not mean Connecticut has no large-load rules; the list is a sample from one source.
States near Connecticut on commercial growth
- New Jersey
- New York
- Maryland
- Illinois
- Hawaii
- District of Columbia
Keep going
Sources
EIA Connecticut sales and prices (CSV); EEI Connecticut tariffs. Nominal prices.
Questions
Did data centers raise Connecticut electricity bills?
This page cannot say. While the Connecticut home price moved +34%, Connecticut commercial sales fell 6% (2019-2025); fuel, wires and rate cases in Connecticut also move prices.
How fast is Connecticut commercial electricity use growing?
Connecticut commercial sales grew -5.6% between 2019 and 2025, 48th among 51 places, and added -0.68 TWh.
Is Connecticut data-center load published?
No open source gives Connecticut data-center load alone, so Connecticut commercial sales stand in as a proxy.