CT Energy Prices
How Connecticut electricity rates compare to the US average and neighboring states
Residential Electricity Prices Over Time
Latest Residential Prices: CT vs. Neighboring States
CT vs. US by Sector
CT Energy Generation Mix
What fuels generate Connecticut's electricity, and how that has changed over time
CT Generation Mix Over Time
CT vs US Generation Mix
Connecticut
United States
Understanding CT's Price Premium
Why Connecticut electricity costs so much more than the national average
CT Price Premium Over US Average
How much more CT pays than the US average, shown as the shaded gap in cents per kWh
Fuel Costs vs. Non-Fuel Factors
Computed from EIA data: how much of CT's premium is explained by higher delivered natural gas costs vs. other factors
Fuel cost impact estimated from EIA delivered natural gas costs using a standard heat rate of 7,800 BTU/kWh. Actual fuel impact may be higher due to ISO-NE marginal pricing and seasonal volatility not captured in annual averages.
Known Non-Fuel Contributing Factors
The red portion above reflects structural and policy costs documented in regulatory filings. No single source provides a complete decomposition, but the major contributors are well established:
Wholesale Electricity Prices: CT vs ISO-NE Hub
Day-ahead wholesale LMPs from ISO-NE, broken into energy, congestion, and loss components. The congestion component directly quantifies transmission constraint costs for CT.
Monthly average day-ahead LMPs ($/MWh). Hub = ISO-NE system-wide weighted average. CT = Connecticut load zone. Source: ISO-NE Web Services API (2010–present).
Natural Gas Citygate Prices: CT vs US
Monthly citygate prices (what local utilities pay for gas delivery) reveal the seasonal volatility that annual averages hide. Winter pipeline constraints through the Algonquin system cause dramatic price spikes in CT.
Citygate price = cost at the entry point to the local distribution system ($/Mcf ≈ $/MMBtu). Source: EIA Natural Gas Prices Summary (monthly, back to 2001).