Observation

Whetstone Stray

Dollis Brook

River or stream

November 6, 2025 at 9:53 AM

QA status: Reviewed: quality check complete

Weather observations

  • Current weather

    Community scientist interpretation

    • Cloudy
    • Rainy
  • Weather in the past 24hrs

    Community scientist interpretation

    • Sunny
    • Cloudy
    • Windy

Qualitative readings

  • Clarity

    Community scientist interpretation

    Clear

  • Water use

    Community scientist interpretation

    other

  • Colour

    Community scientist interpretation

    Colourless


Plants/wildlife

  • Algae

    Community scientist interpretation

    None


Issue reporting

  • Odour

    Community scientist interpretation

    None

  • Pollution sources

    Community scientist interpretation

    Residential discharge, Urban/road discharge

  • Water surface

    Community scientist interpretation

    Natural debris


Physical tests

  • Water flow

    Community scientist interpretation

    Steady

  • Water level

    Community scientist interpretation

    Low


Chemistry tests

  • Ammonia

    Hanna checker (ammonia - medium range)

    0.09 mg/L

  • Conductivity

    Other pen-type meter (conductivity)

    845 μS/cm

  • Water temperature

    Other thermometer

    14.5 °C

  • Phosphate

    Hanna checker (phosphate - low range)

    1.63 mg/L

  • Air temperature

    Other thermometer

    15.4 °C

  • Turbidity

    Turbidity tube (45 cm)

    ≤ 12 NTU


Notes

Testers Jude and Dianne Thames21 River Restoration Project removed toe-boarding upstream of this site on 30th October, many people so much mud disturbance and release of creosote from removing the embedded posts, water was murky but settled overnight. Met with 'Morph' team working with Thames21 on habit assessment etc