Raw sewage from the Linwood Water Reclamation Facility spilled into a creek leading to Lake Lanier for between one and four hours Tuesday.
The city of Gainesville announced the spill just before 5 p.m. Thursday.
The spill happened after drinking water from the Riverside Water Treatment Plant backed up into the nearby sewer system after an equipment malfunction at the plant. The additional water caused the sewer system to overflow upstream of the Linwood plant, dumping a mix of water and raw sewage into a creek between Dawn Court and Island Drive.
The spill is estimated at less than 10,000 gallons and lasted a maximum of four hours, according to the Gainesville Department of Water Resources.
Damaged pipe at the site of the overflow was repaired by Thursday afternoon, the announcement states, and pipes near the damage were visually inspected by the city and no other overflows were found.
Water quality tests done at the site of the spill Wednesday met state water quality standards. The spill site will be monitored and reports submitted to the Georgia Environmental Protection Division for the next 12 months.
The spill was caused by a faulty level indicator at the Riverside Water Treatment Plant, according to the city.
This is the second spill for the Gainesville Department of Water Resources this month. The first spill was reported Dec. 5 and involved treated wastewater, not raw sewage.