Harmful algal blooms (HABs) are occurrences where blue-green algae (cyanobacteria) has ideal conditions and can form harmful blooms. Cyanobacteria can produce toxins (cyanotoxins) that harm human and animal health. Blooms will typically occur during the summer months when the water is warm, there is high levels of nutrients (phosphorous or nitrogen), and the water is calm. When humans ingest water that contains HABs it can cause asthma-like symptoms, difficulty breathing, vomiting, weakness, headaches, or dizziness. Frequently swallowing or swallowing a large amount of cyanotoxins can harm the liver/kidneys.  Symptoms in animals/livestock can be vomiting, diarrhea, fatigue, staggering, excessive drooling, convulsions, and may result in death.