What is the old EPA limit for PFOS?

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Study for the Toxicology Test. Cover key concepts, exposure, and chemical hazards through multiple choice questions with explanations. Prepare effectively for your exam!

Multiple Choice

What is the old EPA limit for PFOS?

Explanation:
Historical drinking-water guidance for PFOS set by the EPA was 70 parts per trillion. In 2016 the EPA issued a non-enforceable health advisory of 70 ppt for PFOS (and PFOA) in drinking water to protect public health from long-term exposure. This value is a guidance level, not a legal standard, and it would prompt actions by water systems or authorities to reduce concentrations and inform the public if exceeded. The other numbers don’t align with this well-known historical value, which is why 70 ppt is the best answer.

Historical drinking-water guidance for PFOS set by the EPA was 70 parts per trillion. In 2016 the EPA issued a non-enforceable health advisory of 70 ppt for PFOS (and PFOA) in drinking water to protect public health from long-term exposure. This value is a guidance level, not a legal standard, and it would prompt actions by water systems or authorities to reduce concentrations and inform the public if exceeded. The other numbers don’t align with this well-known historical value, which is why 70 ppt is the best answer.

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