quantitative
Analysis v1
Some chemicals called PAS are found in drinking water, and they can be harmful. Because of new research, the safe limit for these chemicals has been dropped way down—from 70 to just 4 tiny units per liter.
Evidence from Studies
Supporting (2)
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The study looks at safe levels of harmful chemicals in drinking water and agrees that the safety limit was lowered because new science shows they’re more dangerous than we thought.
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EPA's Unprecedented Interim Drinking Water Health Advisories for PFOA and PFOS
Editorial/Opinion
2023 May-JunThe study talks about the same type of water pollution and confirms the EPA lowered its safety limit for these chemicals because they’re more harmful than we thought.
Contradicting (0)
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No contradicting evidence found
Gold Standard Evidence Needed
According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.