Avangrid (AGR) 8-K AVANGRID Declares Quarterly Dividend

Exhibit 99.1

NEWS RELEASE

December 2, 2016 Contact: Patricia Cosgel (203) 499-2624

AVANGRID Declares Quarterly Dividend

New Haven, CT – December 2, 2016 (NYSE: AGR) – AVANGRID announced that its Board of Directors declared a quarterly dividend of $0.432 per share on its Common Stock.    This dividend is payable January 3, 2017 to shareowners of record at the close of business on December 12, 2016.

Avangrid, Inc. (NYSE: AGR) is a diversified energy and utility company with more than $30 billion in assets and operations in 25 states. The company operates regulated utilities and electricity generation through two primary lines of business. Avangrid Networks includes eight electric and natural gas utilities, serving approximately 3.1 million customers in New York and New England. Avangrid Renewables operates 6.3 gigawatts of electricity capacity, primarily through wind power, in states across the United States. AVANGRID employs approximately 7,000 people. The company was formed through a merger between Iberdrola USA, Inc. and UIL Holdings Corporation in 2015. Iberdrola S.A. (Madrid: IBE), a worldwide leader in the energy industry, owns 81.5% of AVANGRID. For more information, visit www.avangrid.com.