Location

Grays Creek Marina

St. Lawrence River

St. Lawrence River in Ontario

Dataset summary

Grays Creek Marina has data for ph, oxygen, secchi_depth, chlorine, hardness, alkalinity, water_depth, conductivity, air_temperature, water_temperature, current_weather, current_weather_description, previous_weather, and previous_weather_description from 11 July 2025 to 11 July 2025.

45.032497, -74.665259

Summary of quantitative results

Guidelines for exceedances are based on: Canada

  • Chemistry tests

    • Alkalinity

      ppm

      Taylor teststrips (alkalinity)

      80.0

      Latest

      80.0

      Average

      Not enough data for trend yet

      Trendlines will appear once three sampling dates are entered

    • Oxygen

      mg/L

      Chemetrics ampoules (dissolved oxygen)

      7.0

      Latest

      7.0

      Average

      Not enough data for trend yet

      Trendlines will appear once three sampling dates are entered

    • Chlorine

      ppm

      Taylor teststrips (chlorine)

      0.0

      Latest

      0.0

      Average

      Not enough data for trend yet

      Trendlines will appear once three sampling dates are entered

    • Conductivity

      μS/cm

      Water Rangers pen-type meter (conductivity)

      446.0

      Latest

      446.0

      Average

      Not enough data for trend yet

      Trendlines will appear once three sampling dates are entered

    • pH

      Taylor teststrips (pH)

      8.4

      Latest

      8.4

      Average

      Not enough data for trend yet

      Trendlines will appear once three sampling dates are entered

    • Air temperature

      °C

      Water Rangers (stream thermometer) and/or weather app

      28.0

      Latest

      28.0

      Average

      Not enough data for trend yet

      Trendlines will appear once three sampling dates are entered

    • Water temperature

      °C

      Water Rangers pen-type meter (temperature)

      25.9

      Latest

      25.9

      Average

      Not enough data for trend yet

      Trendlines will appear once three sampling dates are entered

    • Hardness

      ppm

      Taylor teststrips (hardness)

      150.0

      Latest

      150.0

      Average

      Not enough data for trend yet

      Trendlines will appear once three sampling dates are entered

  • Physical tests

    • Water depth

      m

      Secchi disk (20 cm diameter)

      0.27

      Latest

      0.27

      Average

      Not enough data for trend yet

      Trendlines will appear once three sampling dates are entered

    • Secchi depth (clarity)

      m

      Secchi disk (20 cm diameter)

      0.27

      Latest

      0.27

      Average

      Not enough data for trend yet

      Trendlines will appear once three sampling dates are entered

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Recent photos

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Location description
Where the boats exit the marina to enter the river.