A water system that detects nitrate at levels above which value must include an informational statement in the Consumer Confidence Report?

In the context of water quality management, a water system must include an informational statement in the Consumer Confidence Report if it detects nitrate levels exceeding 5 mg/L. This threshold is essential because nitrates, particularly in high concentrations, can pose significant health risks, especially to vulnerable populations like infants and pregnant women.

The U.S. Environmental Protection Agency (EPA) sets the Maximum Contaminant Level (MCL) for nitrates at 10 mg/L, which is the regulatory limit for drinking water. However, the requirement to include an informational statement is triggered at the lower level of 5 mg/L to proactively inform consumers about potential health risks associated with nitrate consumption and to encourage monitoring and mitigation efforts. Including this information helps ensure that the public is aware of the water quality, promotes transparency, and emphasizes the importance of safe drinking water standards.