What is the MCL for nitrite?

The Maximum Contaminant Level (MCL) for nitrite in drinking water is set at 1 mg/L (or 1 ppm). This limit is established to protect public health, as excessive levels of nitrite can cause various health issues, particularly in young children, including a condition known as methemoglobinemia or "blue baby syndrome." The MCL allows for safe consumption of water while minimizing the risk associated with nitrite exposure.

It's important to note that while there are varying limits set for different contaminants, the specific limit of 1 mg/L for nitrite reflects the guidelines established by regulatory bodies such as the Environmental Protection Agency (EPA). Ensuring that water treatment facilities monitor and control nitrite levels is essential for maintaining the safety and quality of drinking water.