A massive fish kill stretching at least 20 miles along the Chattahoochee River in Georgia is under investigation. The phenomenon, characterized by a sudden and unexpected death of fish in a short period, was first detected south of where Atlanta’s Peachtree Creek flows into the river, according to the environmental group Chattahoochee Riverkeeper.
Jason Ulseth, the executive director of the Riverkeeper, estimated that there are thousands of dead fish in the river, which forms the southern part of the Georgia-Alabama border. He told The Atlanta Journal-Constitution that this incident represents the worst fish kill he has witnessed in his 20-year tenure with the organization. "I've been on the river my entire life," he said. "I've never seen a fish kill this massive."
Possible Causes Under Scrutiny
While the exact cause remains unknown, Ulseth believes recent flooding may have played a significant role. The Riverkeeper group detected a drop in the river’s levels of dissolved oxygen, which fish require to survive, during the flooding. Treated wastewater released by management agencies often contains low oxygen levels, and the Chattahoochee may have received a sudden influx of this low-oxygen water during the flood. "All of the organic material of the river sucked it dry and essentially depleted all of the oxygen to where it looked like pretty much anything that swims was dead for well over 20 miles," Ulseth explained.
Community Concerns
Rob Van Leer, a resident living near Peachtree Creek, expressed concern about the impact of the mass fish deaths on local livelihoods. "Part of our economic viability is nature and trees," he said. "People want to walk around in nature like we're doing today and not smell and see dead fish."
Riverkeeper’s testing indicated that the water is not harmful to humans, but the group is still advising people to avoid the river between Atlanta and West Point Lake, as reported by The AJC. Ulseth stressed that the Chattahoochee River National Recreation Area, a popular tourist spot, is located farther upstream and remains unaffected.
Ongoing Investigation
The City of Atlanta Department of Watershed Management (DWM) confirmed that an investigation is ongoing. "The Department of Watershed Management takes incidents affecting the Chattahoochee River very seriously," Commissioner Greg Eyerly said. "We understand the concern this fish kill has caused for residents and environmental stakeholders throughout the community. The investigation remains ongoing, and DWM is committed to providing accurate information and transparent updates as findings become available. Protecting the health of our waterways and the communities that depend on them remains one of our highest priorities."
Personnel from Chattahoochee Riverkeeper, the Georgia Environmental Protection Division (EPD), and DWM have been deployed to assess affected areas, collect water quality samples, and coordinate with environmental agencies as part of the investigation. At this time, the cause of the incident has not been confirmed, and no conclusions have been reached regarding contributing factors, the statement added. A spokesperson from the department told The AJC that the first test results from the joint investigation with the EPD and the Riverkeeper are not expected until Tuesday or Wednesday.
