Two new studies document rare cases in which people who rinsed sinuses with unsterilized tap got infected with brain-eating amoebas.
  • @Aux
    3•11 months ago

    PPM is an American way of saying mg/L because they’re all allergic to SI units.

    • El Barto
      2•11 months ago

      Thanks! I knew what PPM was, but I was having trouble visualizing how much chlorine was that in, say, a liter of water.

      And there you go. 1 mg per liter does the trick, and it’s standard!