ADVANCE FOR USE SATURDAY, SEPT. 26, 2015 AND THEREAFTER - FILE - In this Tuesday, July 29, 2014, file photo, water cascades down a stairway leading to a parking structure across from Pauley Pavilion on the UCLA campus after a water main rupture under nearby Sunset Boulevard flooded a large area of the campus in the Westwood section of Los Angeles. The U.S. Environmental Protection Agency projects that it will cost $384 billion over 20 years to maintain the nation’s existing drinking water systems, which will require tens of thousands of miles of replacement pipe and thousands of new or renovated plants. (AP Photo/Mike Meadows)