Observation

Whetstone Stray

Dollis Brook

River or stream

QA status: Not yet checked

November 6, 2025 at 9:53 AM

View trends at this location

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 flow

    Community scientist interpretation

    Steady

  • Water level

    Community scientist interpretation

    Low

  • Algae

    Community scientist interpretation

    None

  • Odour

    Community scientist interpretation

    None

  • Pollution sources

    Community scientist interpretation

    Residential discharge, Urban/road discharge

  • Water use

    Community scientist interpretation

    Other

  • Colour

    Community scientist interpretation

    Clear

  • Water surface

    Community scientist interpretation

    Natural debris

Chemistry tests

  • Ammonia

    mg/L

    Hanna checker (ammonia - medium range)

    0.09

  • Conductivity

    μS/cm

    Other pen-type meter (conductivity)

    845

  • Water temperature

    °C

    Other thermometer

    14.5

  • Phosphates

    mg/L

    Hanna checker (phosphates - low range)

    1.63

  • Air temperature

    °C

    Other thermometer

    15.4

  • Turbidity

    NTU

    Turbidity tube (45 cm)

    12

Recent photos

View more photos ›

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

Location description
Upper Brent Catchment Footbridge over the Brook