Town Hall Address 152 Boomerang Rd. Harrisville, PA 16038 United States- Butler County Website http://psatstwp.org/butler/mercer/ Deed Registry 724-284-5340 https://www2.co.butler.pa.us/paxworld/ Monday - Friday: 8:30 A.M. - 4:30 P.M. 124 West Diamond St., Floor L Butler, PA 16003 United States Tax Collector 724-735-6616 152 Boomerang Rd. Harrisville, PA 16038 United States Fire District 724-662-3290 104 Wilson Ave. Mercer, PA 16137 United States Sewer 724-841-0141 152 Boomerang Rd. Harrisville, PA 16038 United States Code Enforcement 724-841-0141 152 Boomerang Rd. Harrisville, PA 16038 United States County Butler