FOG is an acronym for fats, oils and grease. FOGs create a significant problem for the wastewater treatment plant and the pumping stations, the wastewater collection system, and the local sanitary sewer user. FOGs discharged by residential, commercial, institutional and industrial users account for approximately 25% of all sanitary sewer blockages in the City of Moberly, with numbers similar around the country.
Fats, oils and grease are often washed into the residential plumbing system through the kitchen sink. Fats, oils and grease have poor solubility in water. This means they separate from the liquid.