United Illuminating provides safe, reliable electric service to customers in the greater New Haven and Bridgeport areas of Connecticut.

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Pay your UI bill online by credit card, debit card, or checking / savings account.

Contact us regarding customer service inquiries, emergencies, and power outages.

Explore ways to pay, receive and manage your UI bill. Pay your bill online or learn about other ways to pay using our mobile app, AutoPay, or pay offline.

Planned Maintenance On rare occasions, UI must schedule a power outage in order to accommodate system upgrades. Read more

United Illuminating (UI) is a wholly-owned subsidiary of AVANGRID, Inc. View the most current financial information, including quarterly and annual filings at AVANGRID.com.

The United Illuminating Company’s (UI) comprehensive outdoor lighting program, UI’s Outdoor Lighting, is the easiest and most affordable way to improve the outdoor lighting on your property for safety, …

Support View customer service phone numbers and other important contact information for residential and business customers.

Nov 17, 2025 · Because of deregulation, UI customers can obtain their energy supply from alternate suppliers. UI encourages customers to explore offerings the EnergizeCT rate board, where they may …