What is the Maximum Contaminant Level (MCL) for Nitrate?

The Maximum Contaminant Level (MCL) for Nitrate is set at 10 mg/L. This standard is established by the Environmental Protection Agency (EPA) to protect public health, especially for vulnerable populations such as pregnant women and infants, who are more susceptible to the harmful effects of elevated nitrate levels.

Nitrate can impact the ability of blood to carry oxygen, leading to a serious condition known as methemoglobinemia or "blue baby syndrome" in infants. The MCL of 10 mg/L is designed to minimize these health risks by limiting the concentration of nitrate in drinking water supplies. By adhering to this regulatory standard, water utilities can ensure the safety and quality of the water they provide to the public, thereby promoting health and well-being in the community.