What is MACT commonly associated with regarding air pollutants?

The term MACT stands for Maximum Achievable Control Technology. It refers to regulatory standards developed under the Clean Air Act for controlling hazardous air pollutants from major sources. The primary goal of MACT is to ensure that emissions of hazardous air pollutants are minimized to the greatest extent achievable, based on the best performance that can be demonstrated by the best-performing sources in the same category.

By focusing on the highest level of technology that has been successfully implemented, MACT standards help ensure that the emissions from industries are kept at a minimum risk to public health and the environment. This approach not only promotes the use of advanced technology but also allows for flexibility among sources to choose the most effective means to comply with the standards.

The other options, while they might sound similar, do not accurately represent the MACT concept as they refer to control technologies that may not align with the rigorous standards set for hazardous air pollutants. Understanding MACT is crucial for professionals dealing with environmental regulations and compliance in industries that emit air pollutants.