What is the typical pH range for treated wastewater?

The typical pH range for treated wastewater is between 6.5 to 8.5. This range is considered optimal for most biological processes that occur in wastewater treatment, such as the degradation of organic materials by microorganisms. A pH level within this range ensures that the conditions are conducive for these biological processes, which are essential for effective treatment.

Maintaining this pH range also helps in minimizing toxicity to aquatic life when the treated wastewater is discharged into receiving waters. It prevents corrosive conditions that can arise in lower pH levels, as well as avoiding alkaline conditions that can lead to other operational issues in treatment systems.

Conversely, pH levels outside of this range can indicate problems in the treatment process. For instance, lower pH values could suggest acidemia, while higher pH levels could be indicative of contamination by alkaline substances. Overall, targeting a pH within 6.5 to 8.5 is critical for ensuring the efficiency and safety of wastewater treatment operations.