What effect do harmful algal blooms have on drinking water sources?

Harmful algal blooms (HABs) are significant environmental events that can have serious implications for drinking water sources. The primary concern with HABs is that they can produce various toxins, such as microcystins, which contaminate water supplies. These toxins can pose health risks to humans and animals if ingested, leading to a range of potential health issues, from gastrointestinal problems to liver damage and even neurological effects.

The presence of these toxins means that water that appears clear and visually acceptable could still be unsafe for consumption. Therefore, the risk associated with harmful algal blooms emphasizes the need for monitoring water quality closely, especially in lakes, reservoirs, or areas where nutrient runoff may facilitate such blooms. Understanding this dynamic is crucial for public health and safety regarding drinking water supplies.