United Illuminating Co Electricity Rate per kWh (2024 EIA Data)

United Illuminating Co is an investor-owned electric utility that reports to the U.S. Energy Information Administration under utility number 19497. In 2024 it served 256,302 bundled residential customers in Connecticut (plus 55,989 delivery-only residential accounts that buy their energy from a competitive supplier), and its average realised residential price was 34.04 cents per kWh: $568 million of residential revenue divided by 1.67 million MWh of residential sales.

Across the other sectors, United Illuminating Co's 2024 average prices were 24.27 cents for commercial customers (16,864 accounts), 17.56 cents for industrial customers (221 accounts), and 7.86 cents for transportation customers (1 accounts). Industrial customers paid 16.48 cents less per kWh than households, a 48% discount that is typical of high-volume, high-voltage service. Connecticut allows retail choice, so the customer base splits two ways: 256,302 residential customers took bundled service (energy plus delivery) at 34.04 cents per kWh, while 55,989 bought their energy from a competitive supplier and paid United Illuminating Co only for delivery, which averaged 19.59 cents per kWh for the wires portion.

Within Connecticut, United Illuminating Co ranked number 2 of 6 utilities with bundled or delivery service by residential accounts served (312,291, bundled plus delivery-only) and accounted for 16.24% of the state's residential electricity sales in 2024, measured in MWh sold or delivered rather than in customers. The state-wide average realised residential price in 2024, computed from the same EIA file, was 28.75 cents per kWh, so United Illuminating Co's customers paid 5.29 cents above the Connecticut average (+18.4%). For context, EIA's latest monthly figure for Connecticut is 24.32 cents per kWh (June 2026, Electric Power Monthly); that is a different, more recent measure across all utilities and is not directly comparable with a 2024 annual average.

EIA's service-territory file places United Illuminating Co in 2 Connecticut counties: Fairfield and New Haven. On the grid side it operates in the NPCC NERC region and the ISO New England market, and reported transmission, buying transmission, and distribution as its activities. Balancing authority code: ISNE.

United Illuminating Co is not among the utilities included in EIA's preliminary 2025 early release, so the 2024 final data is the most recent figure available for it.

Comparable Connecticut utilities of similar size include Champion Energy Services (225,587 residential accounts served, 9.98 cents), Constellation NewEnergy, Inc (1,113,912 residential accounts served, 15.95 cents), Connecticut Light & Power Co (1,174,420 residential accounts served, 28.51 cents), Direct Energy Services (1,228,774 residential accounts served, 16.37 cents), and MP2 Energy LLC (39,395 residential accounts served, 14.65 cents).