In the period from June 2024 to May 2025, electricity consumption in Connecticut shows a pronounced reliance on fossil fuels, which make up nearly 60% of the total electricity mix. The vast majority of this is sourced from gas, almost accounting for the entire fossil fuel segment. On the other hand, low-carbon or clean energy sources contribute about 40% to Connecticut's electricity supply. Within this cleaner energy category, nuclear power stands out significantly, generating almost 36%, while biofuels and solar only contribute around 1% each. Despite the commendable contribution from nuclear power, the minimal presence of other low-carbon sources highlights a potential area for improvement in Connecticut's pursuit of a more sustainable energy future.
Is Electricity Growing in Connecticut?
Connecticut is experiencing a concerning trend in its electricity consumption. Recent data indicates a decrease in total electricity usage, down to 12,013 kWh per person in 2025, from a previous record of 12,288 kWh in 2024, showing a reduction of 274 kWh per person. Even more troubling is the decline in low-carbon electricity generation, falling from a peak of 5,193 kWh per person in 2021 to 4,759 kWh per person in 2025, a drop of 434 kWh. This downturn not only hampers progress towards a greener, more sustainable electricity grid but also risks increasing future reliance on fossil fuels if corrective measures are not taken promptly.
Suggestions
To enhance Connecticut’s low-carbon electricity portfolio, an expansion of existing nuclear capacity is highly recommended, given its proven capability in the state. In learning from other regions, Connecticut can draw inspiration from France and Slovakia, where nuclear power constitutes a significant share of their electricity generation at impressive rates of 69% and 64% respectively. Additionally, while nuclear offers stability and significant output, solar energy also presents a valuable opportunity, as seen in regions like Lebanon and Nevada, where solar contributes 31% and 29% of their electricity, respectively. By harnessing the lessons from these successful regions and focusing on both nuclear and solar capacities, Connecticut can significantly accelerate its transition to a clean energy future.
History
Reflecting on the history of low-carbon electricity in Connecticut, there have been notable fluctuations primarily within the nuclear sector over the years. The early 2000s saw decreases and occasional increases in nuclear output, with the most recent data from 2025 showing a minor decline. Unfortunately, some years, such as 2020 and 2023, experienced more substantial reductions in nuclear electricity, significantly impacting the state's clean energy standings at those times. However, several positive years like 2009, 2012, 2015, and 2024 show significant boosts, underscoring the pivotal role expansion in nuclear capacity can play in ensuring a stable and robust low-carbon electricity system.