In environmental compliance, the acronym BACT stands for which of the following?

• A. Best Achievable Control Technology
• B. Basic Air Compliance Threshold
• C. Biological Assessment and Compliance Test
• D. Best Available Compliance Technique

Answer: (A)

BACT stands for Best Available Control Technology, the emission control standard used in air permitting for new or modified sources under the Clean Air Act’s PSD program. It requires selecting the most effective technology that is actually available and feasible for the specific source, taking into account costs, energy use, and environmental impact. This ensures that new facilities implement strong controls without becoming impractically burdensome. The other phrasings don’t align with regulatory terminology—Basic Air Compliance Threshold, Biological Assessment and Compliance Test, or Best Available Compliance Technique aren’t recognized standards in this context. In practice, a permitting decision weighs what technologies exist, what they can realistically achieve for that source, and what is economically feasible.