HAMPTON SHALER WATER AUTHORITY After Hours Emergency: (412) 486-4867, option 3 Water service is provided by the Hampton Shaler Water Authority under an agreement reached in 2013.  To set up new service, change a billing address please contact Hampton Shaler Water Authority (HSWA) at 412-486-4867 or send the correspondence to HSWA, PO Box 66, Allison Park, PA  15101.  Bill payments can be mailed to:  HSWA, P.O. Box 644391, Pittsburgh, PA  15264-4391  If you would like to set up authorization for direct payment, please visit  http://www.hswa-pa.org.  For after hour water emergencies, please call...