The United Illuminating Company (UI): A Utility Serving New Haven, Bridgeport and Coastal Areas of CT

Headquartered in Orange, Connecticut, The United Illuminating Company (UI) handles electricity transmission and distribution for the Bridgeport and New Haven areas of the Connecticut shoreline along Long Island Sound. UI is a subsidiary of Avangrid (NYSE: AGR) and is the smaller of Connecticut’s two electric utilities.

Looking for information on how to shop for cheap CT electricity rates for your home or business in United Illuminating? has you covered. Enter your zip code to shop for an alternative competitive supplier in your area.

United Illuminating CT History

UI CT’s history began in 1881 with several small lighting companies and was formally established as The United Illuminating Company in 1899. In 2000, UI became a subsidiary of UIL Holdings Corporation to hold regulated and related non-regulated businesses. In 2010, UIL and Iderdrola merged and purchased several local gas providers in Connecticut. Today, the UIL/Iderdrola merger is known as Avangrid and is the parent company of UI.

Areas Served By United Illuminating

UI serves 17 Connecticut towns covering 335 square miles along Connecticut’s shoreline. The cities that UI serves includes Bridgeport, New Haven, and Milford.

United Illuminating Residential Standard Service Rate

United Illuminating offers a standard service rate for generation to customers who choose to remain with the utility and not choose an alternative generation supplier. The standard service rate changes every six months, January 1st and July 1st.

Below are current rates for UI. There are two rates for residential customers: Rate R and Rate RT.

  • Rate R is a constant rate regardless of the time of day electricity is used.
  • Rate RT is a time of use rate with one rate for on peak usage 12pm – 8pm and one rate for off peak usage 8pm – 12pm and weekends.
United Illuminating Rate ClassJanuary 1 - June 30, 2019
Generation Supply Rate cents/kWh
July 1 - December 31, 2019
Generation Supply Rate cents/kWh
Rate R11.2263¢8.3532¢
Rate RT Peak13.7718¢10.9125¢
Rate RT Off-Peak10.2718¢7.4125¢

In January 2019, both UI and Eversource (the other utility in the state) announced big rate increases. Consumers had a 24% increase in their bills starting in January. Now, moving into July 2019, rates are dropping again. But how long will they stay there? The rates will change again in January 2020. New rates are announced around 45 days before they become effective.

Because of the rate fluctuations and the unknown, some consumers have decided to shop for an electricity provider and lock in a fixed rate. That’s a smart idea.

Shop for an Alternative Electricity Supplier

If you haven’t shopped for a supplier, you are likely on the Standard Service Offer Rate from UI. When you switch to an alternative electricity supplier, you can lock in a fixed rate for your electricity. This offers security and peace of mind. Longer term plans of 24 or 36 months often give the best savings on your electricity price.

Ready to shop now for your alternative electricity supplier? All you need is a copy of your bill (for your account information) and your zip code.

Best CT Electricity Rates in UI

Provider Plan Name Term Rate/kWh
Discount Power Signature Green 12 12 9.09 ¢
Public Power Public Power Electric 36 Fixed 36 9.25 ¢
Public Power Public Power Electric 24 Fixed 24 9.31 ¢
Public Power Public Power Electric 12 Fixed 12 9.50 ¢
Think Energy Think Clean 12 12 9.6 ¢
Verde Energy Guaranteed Choice 24 24 9.89 ¢
Verde Energy Guaranteed Choice 12 12 9.99 ¢
Discount Power Signature Green 12 12 10.6 ¢
XOOM Energy SimpleClean 12 12 10.99 ¢
Discount Power Signature Green 36 36 10.99 ¢

Shop UI Electricity Rates Near You

Business owners in the UI market can also shop for their electricity. Small businesses can view current plans. Larger businesses can get a custom electricity quote.

Shop CT small business electricity rates

Get a quote for large commercial electricity rates

Want to learn more? Read our article on How to Shop for an Electricity Supplier in CT.

Utility Highlights

Efficiency and careful stewardship of electricity resources are central to the philosophy of UI. The electricity utility is making huge strides toward sustainability and social responsibility in all areas of their operation, and for all types of Connecticut residential and business customers.

At UI, sustainability at the heart of everything, from electricity generation to community projects and even choices made about upgrades and changes to the electric infrastructure. In addition, UI helps to administer the Energy Efficiency Fund, an Energize Connecticut partner. UI is improving its efficiency by investing in technology and learning better ways of using its existing equipment.

Here are a few ways this Connecticut utility is reaching out to the community to increase sustainability over a wider area and provide excellent customer service:

  • Increasing education about distributed generation. UI is encouraging local customers to connect their own forms of electricity generation to reduce their reliance on the grid. By educating customers on the ways that solar, wind, fuel cell and micro turbines can help reduce their power costs and support the power infrastructure at the same time, this utility is making it easier for people to decrease their dependency on the electric grid.
  • Electric vehicle infrastructure. Working with both state and local government, UI is streamlining the integration of electric cars into the state of Connecticut. It’s not enough to have electric cars, you also have to have somewhere to charge them—and that’s something UI is building.
  • Outage alerts. UI provides extensive outage alert services , including a real-time online outage map, messaging alerts, and online education resources to help customers prepare for storms and other emergencies.

Coastal areas of Connecticut served by UI can rest assured that they are receiving great utility service and reliability from a relatively small but experienced utility focused on sustainability.

Customers living in areas of Connecticut served by UI can select an alternative energy supplier and get excellent CT electric rates. United Illuminating will continue to serve customers as the local utility and bill customers in the same manner without interruption in service.