Two ways in which heavy rain can affect the efficiency of waste water treatment?

Heavy rain can overwhelm wastewater treatment facilities, leading to combined sewer overflows (CSOs) where untreated sewage is discharged into water bodies. Additionally, increased rainfall can dilute wastewater, reducing the concentration of contaminants and potentially disrupting biological treatment processes, making it harder for treatment systems to effectively break down pollutants. These factors can compromise the overall efficiency and effectiveness of wastewater treatment operations.