What term describes microscopic photosynthetic plants that cause taste and odor issues in water?

The term that describes microscopic photosynthetic plants causing taste and odor issues in water is "algae." Algae are a diverse group of aquatic organisms that can perform photosynthesis, converting sunlight into energy. Certain types of algae can proliferate rapidly in water bodies, particularly when nutrients like nitrogen and phosphorus are abundant. This overgrowth, often referred to as algal blooms, can lead to the release of various metabolites, which can produce unpleasant tastes and odors in drinking water supplies.

The presence of specific species, such as blue-green algae (cyanobacteria), can also produce toxins that not only affect taste and odor but can pose serious health risks to humans and animals. Understanding the role of algae in water quality is essential for sanitarians and water treatment professionals as they work to ensure safe and palatable drinking water.