When do taste and odor complaints occur most frequently in water systems?

Taste and odor complaints in water systems most frequently occur in summer due to a combination of environmental factors and biological activity. Warmer temperatures can lead to increased growth of algae and other microorganisms in water sources. This biological growth often results in the production of organic compounds that can impart unpleasant tastes and odors to the water supply. Additionally, during summer months, higher water consumption and evaporation can concentrate these compounds, further exacerbating the issue.

The warmer weather and increased sunlight enhance the metabolic rates of microorganisms, leading to a spike in the production of compounds like geosmin and 2-methylisoborneol, which are known to cause earthy or musty flavors and smells in water. Therefore, summer presents an ideal environment for the occurrence of these complaints, making it crucial for water operators to monitor water quality regularly during this season.