Officials with the Town of Cary said the collection of grease led to an estimated 13,268-gallon sewer spill around 10 a.m. near the 400 block of Crossroads Boulevard.
Crews cleared the blockage within an hour after the waste reached an unnamed tributary of Lake Johnson. No fish died because of the spill, according to officials.
Over 250,000 gallons of de-chlorinated water was used in the clean-up process; with the City of Raleigh's assistance, the water was pumped into Raleigh's sewer collection system.
In an effort to decrease such incidents, in 1998 the Town of Cary adopted a Fats, Oils and Grease Control Ordinance that requires food preparation and service facilities to control fats, oils and grease with properly sized grease interceptors that are cleaned regularly. Cary also offers curbside cooking oil collection to residents.