New York
Toxic algae in Bronx County lakes
2 lakes and waterways in Bronx County have harmful algal bloom reports in New York's official data. The most recent entry is for Indian Pond: Indian Pond was not on New York's bloom list in 2025. It was last listed in 2021, with confirmed bloom status. Indian Pond and Fieldston's Indian Lake have had blooms in three or more years.
Lakes with bloom history
Newest report first. Each lake has its own page with the full history and what the results mean.
Source: New York State Department of Environmental Conservation (DEC), official data, checked 24 October 2026. For today's conditions see the NYHABS map. No report doesn't mean a lake is safe: most water is only tested occasionally.