Atlanta metro downpour leads to massive fish kill on the Chattahoochee River

Key Points:

• A massive fish kill has been reported along a 20-mile stretch of the Chattahoochee River west of Atlanta, with thousands of dead fish including spotted bass, catfish, carp, shad, and striped bass found by Chattahoochee Riverkeeper.
• The die-off followed a severe thunderstorm that caused heavy rainfall and flash flooding, with experts citing prolonged drought and heat leading to low river flow and elevated water temperatures as contributing factors.
• Chattahoochee Riverkeeper suspects that polluted stormwater and untreated sewage discharge from an underground tunnel system also played a significant role in the fish kill, noting the presence of sewage-related debris in the river.
• The City of Atlanta’s Department of Watershed Management is investigating and reports preliminary data suggests the tunnel system operated within permitted standards, though further testing is ongoing.
• Litigation over sewage contamination in the Chattahoochee River has been ongoing since the 1990s, highlighting long-standing environmental concerns in the area.