sewage management program
West Nottingham Township

PaDEP -- The Ins and Outs of Septic Systems in Pennsylvania

PennState Extension -- On-Lot Wastewater Systems; The Basics

PennState Extension -- Septic Tank Pumping

New Garden Township -- Septic Maintenance

London Grove Township -- On Addressing System Malfunctions

London Grove Township -- Cesspools and Seepage Pits

London Grove Township -- Permitting On-Lot Systems

US EPA SepticSmart
On-Lot Sewage Disposal System (OLDS) Operation and
Maintenance

The purpose of an on-lot sewage disposal system is to release household wastewater to
surrounding soils no faster than the soils can neutralize pathogens and nutrients to prevent
contamination of drinking water and pollution of surface water.  The septic tank allows

naturally occurring enzymes and bacteria to decompose solids, holding back floating scum
and allowing heavier sludge to settle on the bottom.  If scum and sludge accumulate to the
point where they clog openings in the absorption field piping, untreated sewage can back
up into the home or inadequately treated wastewater can reach the surface or leech into
wells and streams