Over the next two decades, PWD began supplying water to Cumberland, Falmouth, Gorham and the islands of Casco Bay.

Toward the end of the 20th century, the company expanded several times, including improving its infrastructure by constructing water-supply systems to serve Steep Falls, Standish and North Windham.

[5] It has also built treatment plants in Westbrook, Little Falls, Cape Elizabeth and Peaks Island.

[1] The company, which delivers an average of 21 million gallons of water each day, has 186 employees.

It maintains over 5,000 hydrants, around 115 miles (185 km) of pipelines and 76 pump stations.