At what temperature does wastewater discharge become unsuitable by potentially killing organisms?

Wastewater discharge becomes potentially unsuitable for aquatic organisms when it reaches a temperature of 104°F. At this temperature, the oxygen levels in the water can significantly decrease, leading to conditions that are harmful or even lethal for many aquatic organisms. Most organisms are adapted to survive within a specific temperature range, and a rise to 104°F can stress or kill bacteria and other important microorganisms that are essential for the natural breakdown of waste and maintaining a balanced aquatic ecosystem.

Furthermore, higher temperatures can also disrupt the metabolic rates of aquatic life, leading to increased mortality rates and affecting biodiversity. Therefore, maintaining wastewater discharge temperatures below this threshold is critical for protecting aquatic life and ensuring the health of the ecosystem.