Bridgeport-based Aquarion announced today, Wednesday, it is buying 20 water companies from Bethel-based Rural Water Co. Inc. The price was not disclosed. The systems serve residents in Brookfield, Danbury, New Fairfield and Ridgefield. This is the third Aquarion acquisition in the Greater Danbury area in the last year. Auarion is among the nation&amp;#8217;s largest investor [...]