Greenwater is a term often used to describe a type of water that appears green due to the presence of algae or other microorganisms. This phenomenon can occur in lakes, ponds, and other bodies of water, especially in warm weather when nutrients are abundant. The green color is typically a sign of high levels of nutrients like nitrogen and phosphorus, which can come from sources such as fertilizers or runoff. While greenwater can indicate a thriving ecosystem, excessive algae growth can lead to problems like oxygen depletion, harming aquatic life. In some cases, certain types of algae can produce toxins that pose risks to humans and animals. Managing nutrient levels is essential to maintaining healthy water bodies and preventing harmful algal blooms.