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Caution Advised: Blue-Green Algae Bloom in Lake Allatoona
14 May
Summary
- Blue-green algae bloom detected in Lake Allatoona near Red Top Mountain Park Marina.
- Bloom reported on May 7, officials are actively monitoring water quality.
- Algae poses significant health risks, especially to pets, due to potent toxins.

A potentially dangerous blue-green algae bloom is currently being monitored in Lake Allatoona, Cobb County officials announced. The bloom was first reported on May 7 near the Red Top Mountain Park Marina. The Cobb County-Marietta Water Authority (CCMWA) is routinely checking the lake's water quality for toxic algae.
While the CCMWA stated that its treatment processes are not impacted and drinking water remains safe, the public is urged to exercise caution at the lake. Authorities specifically highlighted the extreme danger the algae poses to pets. Dogs are particularly susceptible to the cyanotoxins, which can be ingested when they lick their fur after contact with contaminated water.