Posted by Callum Vallance-Poole, on July 10, 2024.
The water discharged from a wastewater treatment plant is not drinkable, despite some claims in the industry. However, the water is generally very clean with only slight coloration due to suspended solids. The treatment process aims to meet quality parameters set by regulatory standards. These include limits for BOD (biological oxygen demand), suspended solids, and ammonia. Most treatment plants exceed these standards. It’s important to note that pathogens and microorganisms may still be present in the water. Future technologies like disinfection with UV or chlorine may further improve water quality, potentially allowing for reuse in gardens. However, there is currently no certification in the UK for drinking treated wastewater. So, while the water is of high quality, it is not suitable for drinking.