On October 10, 1949, articles of incorporation were approved by the Deputy Secretary of the Commonwealth of Pennsylvania for the formation of the Patton Township Municipal Authority to serve as the water supply entity for Patton Township. The first meeting of the newly formed Authority was held on October 18, 1949 with the following Board of Directors present: Joseph Berkley, Charles L. Fox, Forrest Leddon, William O. Rook, and Clair J Stephens. The original service area extended from the existing Municipal Building, south along Monroeville Rd. and James St. to their intersections with Ohio Street.

The 1950’s and 1960’s brought major changes to the Authority as development in Monroeville began to boom. A 1,500,000 gallon storage tank was built on Center Rd. in the early 50’s. In the late 50’s and early 60’s twin 1,000,000 gallon elevated storage tanks located on Foxwood and Illini Drives and the Haymaker Rd. Pump Station were built. 

On June 23, 1959 the Authority’s name was changed to the Monroeville Water Authority. Also that year, the main pump station and general office building were constructed on Old William Penn Highway. As Monroeville continued to grow, a 10,000,000 gallon tank was built in Boyce Park.

In July 2002, Monroeville Water Authority changed it's name to Monroeville Municipal Authority.

The Monroeville Municipal Authority has grown into a complex network of supply sources, pumping, piping, and storage facilities and has met the supply needs of the Monroeville community for over 50 years.