Denver's Blue-Green Algae Season Starts Early, Poses Risks to Dogs

The Denver Department of Public Health & Environment reported an early blue-green algae bloom in Grasmere Lake this May, a significant shift from the typical summer occurrence. Senior environmental public health analyst Al Polonsky noted that warm water temperatures contributed to the bloom's early appearance. Health officials emphasize the dangers of blue-green algae, particularly for dogs, which can suffer from serious health issues if they ingest contaminated water. The department advises against water recreation in city parks and will post warning signs wherever toxins are detected. Blue-green algae thrives in nutrient-rich waters, and Denver's lakes have high phosphorus levels from urban runoff.

This early bloom serves as a reminder for residents to remain cautious about water quality in local parks.