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  2. Per- and polyfluoroalkyl substances - Wikipedia

    en.wikipedia.org/wiki/Per-_and_polyfluoroalkyl...

    The Michigan Department of Environment, Great Lakes, and Energy introduced some of the strictest drinking water standards in the country for PFAS, setting maximum contaminant levels (MCLs) for PFOA and PFOS to 8 and 16 ppt respectively (down from previous existing groundwater cleanup standards of 70 ppt for both), and introducing MCLs for five ...

  3. Perfluorohexanesulfonic acid - Wikipedia

    en.wikipedia.org/wiki/Perfluorohexanesulfonic_acid

    For example, Minnesota recommends a guidance value of 0.027 μg/L for PFHxS, [23] and Michigan has a screening level of 0.084 μg/L for PFHxS. [4] In 2020, Michigan adopted drinking water standards for 5 previously unregulated PFASs including PFHxS, which has a maximum contaminant level (MCL) of 51 parts per trillion (ppt) or 0.051 μg/L. [24] [25]

  4. Timeline of events related to per- and polyfluoroalkyl ...

    en.wikipedia.org/wiki/Timeline_of_events_related...

    One of twenty deer tested near Clark's Marsh was found to have a PFOS level of 547 parts per billion (ppb) taken from a muscle sample. It is unknown how PFAS could accumulate to the level seen in the deer found near Clark's Marsh. All deer except the one with elevated levels at Clark's Marsh were found to have no or very low levels of PFAS ...

  5. List of countries by population (United Nations) - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by...

    This is the list of countries and other inhabited territories of the world by total population, based on estimates published by the United Nations in the 2024 revision of World Population Prospects. It presents population estimates from 1950 to the present.

  6. Perfluorooctanesulfonic acid - Wikipedia

    en.wikipedia.org/wiki/Perfluorooctanesulfonic_acid

    In 2020 the Michigan Department of Environment, Great Lakes, and Energy (EGLE) adopted stricter drinking water standards in the form of maximum contaminant levels (MCLs), lowering acceptable levels from the 2018 enforceable groundwater cleanup levels of 70 ppt to 8 ppt for PFOA and 16 ppt for PFOS and adding MCLs for 5 previously unregulated ...

  7. Drinking water quality in the United States - Wikipedia

    en.wikipedia.org/wiki/Drinking_water_quality_in...

    Other states that have issued PFAS standards include Michigan, New York and Vermont. [79] Between 2016 and 2021 the U.S. Geological Survey (USGS) tested tap water from 716 locations across the United States, finding PFAS levels exceeding the EPA advisories in approximately 75% of samples from urban areas and in approximately 25% of rural areas ...

  8. List of countries and dependencies by population - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_and...

    Cartogram of the world's population in 2018; each square represents 500,000 people. This is a list of countries and dependencies by population.It includes sovereign states, inhabited dependent territories and, in some cases, constituent countries of sovereign states, with inclusion within the list being primarily based on the ISO standard ISO 3166-1.

  9. Remediation of per- and polyfluoroalkyl substances - Wikipedia

    en.wikipedia.org/wiki/Remediation_of_per-_and...

    Remediation of per- and polyfluoroalkyl substances refers to the destruction or removal of per- and polyfluoroalkyl substances (PFASs) from the environment. PFASs are a group of synthetic organofluorine compounds, used in diverse products such as non-stick cookware and firefighting foams, that have attracted great concern as persistent organic pollutants.

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