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Thousands Dead: Foul Substance and Fish Plague River
26 May
Summary
- Thousands of fish died along a 20-mile Chattahoochee River stretch.
- A foul-smelling black substance coated river banks.
- Drought, heat, and polluted stormwater are suspected causes.

Thousands of fish have died along a roughly 20-mile section of the Chattahoochee River near Atlanta, according to an environmental non-profit. Executive Director Jason Ulseth discovered the dead fish, estimating thousands of various species, floating and strewn along the banks. A foul-smelling black substance also coated the riverbanks, adding to the grim scene.
Investigations by Chattahoochee Riverkeeper and the City of Atlanta's Department of Watershed Management suggest a combination of factors led to the die-off. Prolonged drought had left the river unusually low, and a subsequent intense thunderstorm brought warmer stormwater. This influx stressed aquatic life, exacerbated by urban heat.
However, Chattahoochee Riverkeeper also points to potential sewage discharge from an underground tunnel system and polluted stormwater from Peachtree Creek. Evidence like condoms and wet wipes found in the river suggest sewage contamination, a recurring issue in the Chattahoochee since the 1990s. While the city states preliminary data shows the tunnel system operated within standards, full laboratory tests are pending.