The Conestoga Water Treatment Plant's (WTP) original facilities date from the early 1930’s. This WTP has a current capacity of 14 mgd and withdraws water from the Conestoga River via an intake structure. Raw water pumped from the intake is coagulated with alum and prechlorinated. Depending on raw water quality conditions, potassium permanganate, powdered activated carbon and lime are added. The pretreated water is flocculated in mechanical mixing chambers and then settled by gravity in clarifier and sedimentation basins. Settled water is then sent to eight high-rate sand filters. The filters are equipped with surface scour units and have a nozzle type underdrain system. Filtered water is then dosed with chlorine to disinfect, fluoride and a corrosion inhibitor prior to discharge to the clearwell.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The original Susquehanna WTP facilities date from the 1950’s. The Susquehanna WTP  has a current capacity of 22 mgd and withdraws water from the Susquehanna River via an intake structure. A low-service pump station transfers water approximately 1.5 miles from the River to the plant. Raw water pumped to the Susquehanna WTP is coagulated with alum and lime and prechlorinated. Mixing is achieved with pipeline static elements and transferred to three clarifiers- two upflow solids contact type (precipitators) and one conventional sedimentation basin (clarifier). The settled water is then sent to twelve high-rate anthracite-media filters. Filtered water is then dosed with chlorine for disinfection, fluoride, and a corrosion inhibitor prior to discharge to the clearwell.