Connecticut vs Massachusetts electricity prices: 29.38 ¢ against 30.48 ¢ per kWh
31 places apart: Connecticut #7, Massachusetts #38 of 51, the widest of 29 measures. renewable share of generation Connecticut 3.6%, Massachusetts 17.2%; CO2 per mwh of generation, lb Connecticut 538, Massachusetts 822. Typical bills differ by $24 a month, higher in Connecticut.
Over a year the typical energy bill differs by $294 ($207 a month in Connecticut, $183 in Massachusetts). Since 2015 the home price rose +40.3% in Connecticut and +53.7% in Massachusetts: 13.4 points more in Massachusetts. Against the U.S. home average Connecticut sits at +69.8% and Massachusetts at +76.2%.
Where the power in Connecticut and Massachusetts comes from
Fuels with the widest gaps, Connecticut against Massachusetts.
| Fuel | Connecticut | Massachusetts | Gap |
|---|---|---|---|
| Nuclear | 38.2% | 0.0% | 38.2 points, higher in Connecticut |
| Gas | 56.5% | 77.3% | 20.8 points, higher in Massachusetts |
| Solar | 1.5% | 9.2% | 7.7 points, higher in Massachusetts |
| Hydro | 0.7% | 3.3% | 2.7 points, higher in Massachusetts |
Connecticut against Massachusetts: widest gaps
| Measure | Connecticut | Massachusetts | Gap | Rank (of 51) |
|---|---|---|---|---|
| Nuclear share of generation | 38.2% | 0.0% | +38.2 points | #7 / #38 |
| Renewable share of generation | 3.6% | 17.2% | -13.6 points | #51 / #26 |
| CO2 per MWh of generation, lb | 538 | 822 | -284 | #37 / #17 |
| Hydro share of generation | 0.7% | 3.3% | -2.7 points | #39 / #20 |
| Clean share with nuclear | 41.8% | 17.2% | +24.6 points | #28 / #46 |
| Bill as share of income | 2.65% | 2.17% | +0.5 points | #12 / #27 |
| Price change 2024 to 2025 | +2.2% | +3.9% | -1.7 points | #47 / #33 |
| Time-of-use utilities | 33% | 6% | +27.5 points | #34 / #48 |
29 measures compared for Connecticut and Massachusetts; the CSV holds the 8 widest.
CSVConnecticut and Massachusetts on the map
Connecticut and Massachusetts: price over time
Home price, Connecticut and Massachusetts, 2010 to 2025: 16 rows
| Year | Connecticut | Massachusetts | Gap to U.S. |
|---|---|---|---|
| 2010 | 19.25 | 14.59 | +7.71 |
| 2011 | 18.11 | 14.67 | +6.39 |
| 2012 | 17.34 | 14.91 | +5.46 |
| 2013 | 17.55 | 15.83 | +5.42 |
| 2014 | 19.75 | 17.39 | +7.23 |
| 2015 | 20.94 | 19.83 | +8.29 |
| 2016 | 20.01 | 19.00 | +7.46 |
| 2017 | 20.29 | 20.06 | +7.40 |
| 2018 | 21.20 | 21.61 | +8.33 |
| 2019 | 21.87 | 21.92 | +8.86 |
| 2020 | 22.71 | 21.97 | +9.56 |
| 2021 | 21.91 | 22.89 | +8.25 |
| 2022 | 24.61 | 25.97 | +9.57 |
| 2023 | 29.88 | 29.61 | +13.88 |
| 2024 | 28.75 | 29.35 | +12.27 |
| 2025 | 29.38 | 30.48 | +12.08 |
Connecticut 19.25 to 29.38 ¢ and Massachusetts 14.59 to 30.48 ¢ between 2010 and 2025 (EIA).
CSVYour bill in Connecticut and in Massachusetts
Where Connecticut and Massachusetts are alike
- Home price 2025, ¢/kWh: 29.38 and 30.48
- Price change, 2026 to date: -7.7% and -0.3%
- Outage minutes a year, SAIDI: 74 and 77
- Solar output per kW: 1,282 and 1,277
- Solar value of 1 kW: $377 and $389
Sources and dates: data sources.
Questions
Is Connecticut or Massachusetts higher on nuclear share of generation?
Connecticut, by 38.2 points; they rank #7 and #38 of 51.
Is Connecticut or Massachusetts higher on renewable share of generation?
Massachusetts, by 13.6 points; they rank #51 and #26 of 51.
Is Connecticut or Massachusetts higher on CO2 per mwh of generation?
Massachusetts, by 284; they rank #37 and #17 of 51.
Is Connecticut or Massachusetts higher on hydro share of generation?
Massachusetts, by 2.7 points; they rank #39 and #20 of 51.
Is Connecticut or Massachusetts higher on clean share with nuclear?
Connecticut, by 24.6 points; they rank #28 and #46 of 51.
What would 878 kWh a month cost in Connecticut and in Massachusetts?
Connecticut $258, Massachusetts $268: $10 apart, energy only.
Where do Connecticut and Massachusetts match most closely?
home price 2025, ¢/kWh (29.38 and 30.48); price change, 2026 to date (-7.7% and -0.3%); outage minutes a year, SAIDI (74 and 77).