Why is Highland requiring customers to pressure test their sewers while other municipalities are not?

Highland has been combating the I&I (Infiltration & Inflow) problem for longer than any other local sewer system. Our experience has shown us that NO municipal sewer system in the Greater Johnstown area has lowered its flows to the PaDEP mandated limit (625 GPD/EDU) without requiring homeowners to pressure test their full buried pipeline system.