Gas well pressure issue leads to testing of water supply for northern Westmoreland County communities Stephen Huba Monday, Feb. 4, 2019 5:00 p.m. | Monday, Feb. 4, 2019 5:00 p.m. Go Ad-Free Today! Tribune-Review The Municipal Authority of Westmoreland County uses the Beaver Run Reservoir to provide water to about 130,000 people. Find the complete list of communities it supplies water to on A7. Share this post: Facebook Twitter LinkedIn Reddit Email