What does MRDL mean?

MRDL stands for Maximum Residual Disinfectant Level, which refers to the highest level of a disinfectant allowed in drinking water. The establishment of MRDLs is crucial because it ensures that water utilities maintain an effective level of disinfectant to protect public health from harmful microorganisms, while also minimizing any potential health effects that may arise from excessive amounts of those disinfectants.

Setting a maximum level allows for a balance between ensuring adequate disinfection and controlling the level of chemicals used in the water supply. This helps safeguard consumers while adhering to regulations set by agencies such as the Environmental Protection Agency (EPA). The correct interpretation of MRDL is vital for professionals in water treatment and management to ensure compliance with safety standards and to maintain public health.