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At Ravenna Country Club near Littleton, a season of beneficial phytoplankton cleared the irrigation pond of surface algae and nutrients for the first time in six years, with results confirmed by an independent laboratory.

Chemical algaecides kill a bloom, then the nutrients wash back in and it returns. Eco-friendly algae control works on the cause: live beneficial phytoplankton consumes the excess nutrients that feed harmful algae, raises oxygen, and feeds the food chain. Denver based, shipped fresh nationwide.

Florida issued freshwater cyanobacteria advisories in the first week of January 2026. Months later, the same nutrient-rich lakes and canals keep blooming. Florida no longer has a summer freshwater bloom season; it has a year-round one.

On April 23, 2026, volunteers confirmed the earliest harmful algae bloom on record at Cayuga Lake in upstate New York. In 2025, the first bloom did not appear until July 5. The 73 day shift has serious implications for Northeast lake managers.

Lake Mead recorded its first 2026 bloom on March 13. By mid-May a dog had died at the Virgin River and Lake Lawrence, Washington registered microcystin at 5.7 times the state safety limit. The inland West freshwater season starts early.