What is the Maximum Contaminant Level (MCL) for haloacetic acids (HAA5)?

• A. 0.100 mg/L
• B. 0.050 mg/L
• C. 0.060 mg/L
• D. 0.080 mg/L

Answer: (C)

The Maximum Contaminant Level (MCL) for haloacetic acids (HAA5) is set at 0.060 mg/L. This standard is established by the Environmental Protection Agency (EPA) to protect public health by limiting the levels of harmful contaminants in drinking water.

Haloacetic acids are byproducts of the chlorination process used in water treatment, and they can pose health risks if consumed at higher levels. The MCL reflects the concentration level that is deemed acceptable to safeguard human health, based on research and safety assessments.

Understanding the significance of the MCL is crucial for water treatment operators and facilities, as they must ensure compliance with regulations to provide safe drinking water. This level of concentration serves as a benchmark for monitoring and managing the presence of HAA5 in drinking water systems.