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

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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.

Smart Energy Overview Residential Rebates and Programs Section Residential Rebates and Programs UI Smart Solutions Home Energy Solutions Home Energy Solutions - Income Eligible Heating and …

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.

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 …

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