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  2. Walmart, Kroger raise at-home Covid test prices after White ...

    www.aol.com/news/walmart-kroger-raise-home-covid...

    Walmart and Kroger raised the price of Abbott's at-home Covid-19 test kit after an agreement with the White House to sell the tests at a reduced price expired.

  3. pH meter - Wikipedia

    en.wikipedia.org/wiki/PH_meter

    Beckman Model M pH Meter, 1937 [1] Beckman model 72 pH meter, 1960 781 pH/Ion Meter pH meter by Metrohm. A pH meter is a scientific instrument that measures the hydrogen-ion activity in water-based solutions, indicating its acidity or alkalinity expressed as pH. [2]

  4. Water testing - Wikipedia

    en.wikipedia.org/wiki/Water_testing

    The Ministry has created 24 Water Quality Testing Laboratories across Pakistan, developed and commercialized water quality test kits, water filters, water disinfection tablets and drinking water treatment sachets, conducted training for 2,660 professionals of water supply agencies and surveyed 10,000 water supply schemes out of a grand total of ...

  5. Soil test - Wikipedia

    en.wikipedia.org/wiki/Soil_test

    Do-it-yourself kits usually only test for the three "major nutrients", and for soil acidity or pH level. Do-it-yourself kits are often sold at farming cooperatives, university labs, private labs, and some hardware and gardening stores. Electrical meters that measure pH, water content, and sometimes nutrient content of the soil are also ...

  6. How to shop for at-home Covid tests, according to ... - AOL

    www.aol.com/news/shop-home-covid-tests-according...

    BinaxNOW COVID-19 Antigen Self Test $15.88 at Walmart. ... FlowFlex’s home testing kit comes with five tests. After the first test, the brand recommends testing two more times at least 48 hours ...

  7. Drinking water quality in the United States - Wikipedia

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

    Under the LCR, if tests show that the level of lead in drinking water is in the area of 15 ppb or higher, it is advisable—especially if there are young children in the home—to replace old pipes, to filter water, or to use bottled water. EPA estimates that more than 40 million U.S. residents use water "that can contain lead in excess of 15 ppb".

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