St Lawrence river

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Physical tests

• Water depth

  Secchi disk (20 cm diameter)

  0.1 m

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Chemistry tests

• pH

  Taylor teststrips (pH)

  7.5

  Regulatory

• Oxygen

  Chemetrics ampoules (dissolved oxygen)

  8.0 mg/L

  Regulatory

• Hardness

  Taylor teststrips (hardness)

  150 ppm

• Alkalinity

  Taylor teststrips (alkalinity)

  80 ppm

• Conductivity

  Water Rangers pen-type meter (conductivity)

  308 μS/cm

• Air temperature

  Water Rangers (stream thermometer) and/or weather app

  27 °C

• Water temperature

  Water Rangers pen-type meter (temperature)

  27.6 °C