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  2. Hardnesses of the elements (data page) - Wikipedia

    en.wikipedia.org/wiki/Hardnesses_of_the_elements...

    Download QR code; Print/export Download as PDF; Printable version; In other projects Wikidata item; ... Mohs hardness [1] Vickers hardness (MPa) [1] Brinell hardness

  3. Hard water - Wikipedia

    en.wikipedia.org/wiki/Hard_water

    A bathtub faucet with built-up calcification from hard water in Southern Arizona. Hard water is water that has a high mineral content (in contrast with "soft water"). Hard water is formed when water percolates through deposits of limestone, chalk or gypsum, [1] which are largely made up of calcium and magnesium carbonates, bicarbonates and sulfates.

  4. Category:Water in the United States by state - Wikipedia

    en.wikipedia.org/wiki/Category:Water_in_the...

    Water transportation in the United States by state or territory (53 C) Waterfalls of the United States by state (39 C) Watersheds of the United States by state (6 C, 2 P)

  5. 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 ...

  6. Hardness comparison - Wikipedia

    en.wikipedia.org/wiki/Hardness_comparison

    A variety of hardness-testing methods are available, including the Vickers, Brinell, Rockwell, Meyer and Leeb tests. Although it is impossible in many cases to give an exact conversion, it is possible to give an approximate material-specific comparison table for steels .

  7. Zinke introduces legislation to regulate Flathead Lake water ...

    www.aol.com/zinke-introduces-legislation...

    Nov. 15—U.S. Rep. Ryan Zinke on Tuesday introduced legislation in Congress aimed at ensuring Flathead Lake avoids another year of abnormally low water levels. The Fill the Lake Act would require ...

  8. Drinking water quality standards - Wikipedia

    en.wikipedia.org/wiki/Drinking_water_quality...

    * means action level; not a concentration standard. A public water system exceeding the action level must implement "treatment techniques" which are enforceable procedures. [14] ** TT (treatment technique). The public water system must certify that the combination of dose and monomer level does not exceed: acrylamide = 0.05% dosed at 1 mg/L (or ...

  9. Jay-Z, Diddy accusations create mystery surrounding female ...

    www.aol.com/jay-z-diddy-accusations-create...

    Legal experts believe the unknown female celebrity tied to the Jay-Z and Sean "Diddy" Combs rape lawsuit has sought her own representation with attorneys.

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