Even the most successful door-to-door salesman would be envious of the sewer department in South Williamsport, Pa. The department is correcting a serious infiltration and inflow (I&I) problem by going house-to-house throughout the borough, examining laterals on nearly 3,000 private properties and mandating replacements where necessary.And with several hundred properties to go, the borough (population 6,400) is already seeing significant reductions in flow — even more than engineering estimates. “The impact has been tremendous,” says sewer inspector Keith Anderson. “Our overflows are down substantially. We shot for the best and it went further than we hoped.”The program uses a range
