Observation

East Holland River at Aurora Community Arboretum (AFLC)

Lake Simcoe

River or stream

October 18, 2025 at 1:29 PM

QA status: Reviewed: quality check complete

Weather observations

  • Current weather

    Community scientist interpretation

    • Sunny

  • Weather in the past 24hrs

    Community scientist interpretation

    • Rainy

Chemistry tests

  • pH

    Taylor teststrips (pH)

    7.3

    Regulatory

  • Oxygen

    Chemetrics ampoules (dissolved oxygen)

    7.0 mg/L

    Regulatory

  • Hardness

    Taylor teststrips (hardness)

    250 ppm

  • Alkalinity

    Taylor teststrips (alkalinity)

    160 ppm

  • Conductivity

    Water Rangers pen-type meter (conductivity)

    908 μS/cm

  • Air temperature

    Water Rangers (stream thermometer) and/or weather app

    20 °C

  • Water temperature

    Water Rangers pen-type meter (temperature)

    12 °C

  • Chlorine

    Taylor teststrips (chlorine)

    ≤ 0 ppm

Notes

on the water surface: none in the immediate surroundings: none evidence of water uses: none algae: no water flow: slow estimated water level: low Water colour: clear clarity: clear odour: none