Exhibit 99.1

News release via Canada NewsWire, Toronto 416-863-9350

Attention Business Editors:

Algonquin Power & Utilities Corp. declares dividend for December 2009 and announces change to a quarterly dividend schedule

OAKVILLE, ON, Dec. 18 /CNW/ - Algonquin Power & Utilities Corp. (“Algonquin”) (TSX:AQN) of Oakville, Ontario announced today that its Directors have declared a dividend on its shares. The dividend is $0.02 per share payable on January 15, 2010 to the shareholders of record on December 31, 2009 for the period from December 01, 2009 to December 31, 2009. For Canadian resident shareholders, dividends declared are considered as “eligible dividends” for purposes of the dividend tax credit rules contained in the Income Tax Act (Canada).

Effective January 1, 2010, Algonquin will change to a quarterly dividend schedule rather than the current monthly dividend schedule, subject to subsequent Board declarations each quarter. As a result, Algonquin anticipates declaring a per share dividend for the first quarter of 2010 of $0.06, which is the equivalent of the current per share dividend of $0.02 per month. The first quarterly record date is expected to be March 31, 2010, with a payment date on or about April 15, 2010.

“The change to a quarterly dividend schedule is part of our continuing strategic evolution to a growth oriented, dividend paying corporation focused on delivering attractive total shareholder return,” stated Ian Robertson, Managing Director of Algonquin. “We believe that the payment of dividends on a quarterly schedule is consistent with our peer corporations in the utility and power sectors”.

Algonquin currently has 92,532,047 common shares outstanding.

About Algonquin Power & Utilities Corp.

Through its distinct operating subsidiaries, Algonquin owns and operates a diversified approximately $1 billion North American portfolio of clean renewable electric generation and sustainable utility distribution businesses. Algonquin’s electric generation subsidiary includes 42 renewable energy facilities and 11 high efficiency thermal energy facilities representing more than 400 MW of installed capacity. Through its wholly owned subsidiary,

Liberty Water Co., Algonquin provides regulated utility services to more than 70,000 customers with a portfolio of 18 water distribution and wastewater treatment utility systems. Pursuant to a previously announced agreement, Algonquin is committed to acquiring the California based regulated utility electric distribution and generation assets of NV Energy which serve approximately 47,000 retail electricity distribution customers. Algonquin and its operating subsidiaries deliver continuing growth through an expanding pipeline of greenfield and expansion renewable power and clean energy projects, organic growth within its regulated utilities and the aggressive pursuit of accretive acquisition opportunities. Algonquin’s common shares and convertible debentures are traded on the Toronto Stock Exchange under the symbols AQN, AQN.DB, AQN.DB.A, and AQN.DB.B. Visit Algonquin Power & Utilities Corp. on the web at www.AlgonquinPower.com.

Forward Looking Information

Certain statements in this news release, other than statements of historical fact, are forward-looking statements based on certain assumptions and reflect Algonquin’s and its subsidiaries’ current expectations. Forward-looking statements are provided for the purpose of presenting information about management’s current expectations and plans relating to the future and readers are cautioned that such statements may not be appropriate for other purposes. These statements may include, without limitation, statements regarding the operations, business, financial condition, priorities, ongoing

objectives, strategies and outlook of Algonquin and its subsidiary entity Algonquin Power Income Fund for the current fiscal year and subsequent periods. Forward-looking statements include statements that are predictive in nature, depend upon or refer to future events or conditions, or include words such as “will” and “may”. This information is based upon certain material factors or assumptions that were applied in drawing a conclusion or making a forecast or projection as reflected in the forward-looking statements, including the perception of historical trends, current conditions and expected future developments, as well as other factors that are believed to be appropriate in the circumstances. Although these forward-looking statements are based upon management’s current reasonable expectations and assumptions, they are subject to numerous risks and uncertainties, including those set out in the management’s discussion and analysis section of Algonquin Power Income Fund’s 2008 annual report, Algonquin Power Income Fund’s Annual Information Form dated March 31, 2009 and Algonquin Power Income Fund’s Management Information Circular dated March 20, 2009. Algonquin’s actual results could differ materially from those expressed in, or implied by, these forward looking statements and, accordingly, no assurances can be given that any of the events anticipated by the forward-looking statements will transpire or occur, or what benefits, including the amount of dividends, Algonquin and shareholders will derive therefrom. The forward-looking statements contained in this news release are made as of the date hereof for the purpose of providing readers with Algonquin’s expectations. The forward-looking statements may not be appropriate for other purposes. Other than as specifically required by law, Algonquin undertakes no obligation to update any forward-looking statements to reflect events or circumstances after the date on which such statement is made, or to reflect the occurrence of unanticipated events, whether as a result of new information, future events or results, or otherwise.

%SEDAR: 00014832E

/For further information: Ms. Kelly Castledine, Algonquin Power & Utilities Corp., 2845 Bristol Circle, Oakville, Ontario, L6H 7H7, Telephone: (905) 465-4500, www.algonquinpower.com/

(AQN.)

CO: Algonquin Power & Utilities Corp.

CNW 08:00e 18-DEC-09