What is the Maximum Contaminant Level (MCL) for Total Trihalomethanes (TTHMs)?

The Maximum Contaminant Level (MCL) for Total Trihalomethanes (TTHMs) is set at 0.08 mg/L. This regulatory standard is established by the U.S. Environmental Protection Agency to ensure the safety and quality of drinking water. TTHMs are a group of four organic chemicals that are produced as byproducts during the chlorination of drinking water and are associated with potential health risks when consumed at elevated levels.

The determination of 0.08 mg/L as the MCL is based on studies that identify the risk of cancer and other health concerns associated with long-term exposure to these compounds. Regulatory agencies continually assess data to balance public health needs with practical considerations for the treatment of drinking water.

Understanding this context is key in water quality management and ensures compliance with safety standards for public health. A value higher than this standard, such as 0.10 mg/L or greater thresholds suggested in the other options, would indicate a risk of violating health safety guidelines and could result in regulatory actions or the need for remedial measures by water suppliers.