What is the Maximum Contaminant Level Goal (MCLG) for suspected carcinogens?

• A. 0.020 mg/L
• B. 0.050 mg/L
• C. Zero
• D. 0.010 mg/L

Answer: (C)

The Maximum Contaminant Level Goal (MCLG) for suspected carcinogens is set at zero because the goal emphasizes the level of contaminants in drinking water that poses no risk to human health. The MCLG represents a health-based standard that reflects the absence of potential health effects, particularly when it comes to substances that are suspected or known to cause cancer.

Setting the MCLG for suspected carcinogens at zero illustrates a precautionary approach in water safety regulation. It prioritizes public health by implying that no amount of a suspected carcinogen is deemed safe for consumption. This goal helps to ensure that water treatment facilities work to minimize and eliminate any detectable levels of harmful contaminants, fostering an overall lower risk of cancer associated with drinking water supplies.

Other numerical levels mentioned in the options reflect permissible limits often based on risk assessments but do not convey the same level of safety consideration that a zero goal implies specifically for substances with potential carcinogenic properties.