Observation

Quinta Open Space

Dollis Brook

River or stream

View trends at this location

January 18, 2026 at 11:45 AM

QA status: Reviewed: quality check complete

Weather observations

  • Current weather description

    Community scientist interpretation

    Light cloud,

  • Weather in the past 24hrs description

    Community scientist interpretation

    Some rain overnight

  • Current weather

    Community scientist interpretation

    • Cloudy

  • Weather in the past 24hrs

    Community scientist interpretation

    • Sunny
    • Rainy

Qualitative readings

  • Water flow

    Community scientist interpretation

    Steady

  • Water level

    Community scientist interpretation

    High

  • Algae

    Community scientist interpretation

    None

  • Odour

    Community scientist interpretation

    None

  • Water use

    Community scientist interpretation

    Other

  • Colour

    Community scientist interpretation

    Brown

  • Water surface

    Community scientist interpretation

    None

Chemistry tests

  • Ammonia

    mg/L

    Hanna checker (ammonia - medium range)

    0.18

  • Conductivity

    μS/cm

    Other pen-type meter (conductivity)

    527

  • Turbidity

    NTU

    Turbidity tube (45 cm)

    12

  • Water temperature

    °C

    Other thermometer

    8.8

  • Phosphates

    mg/L

    Hanna checker (phosphates - low range)

    0.31

  • Air temperature

    °C

    Other thermometer

    9.0

Recent photos

View more photos ›

Notes

Brook still appears light brown after heavy rainfall on Thursday 15th, run off from fields above this point. London clay and a lot of water sitting on grass/fields still. Water flowing faster than it does on average but could not be described as surging. Area also popular with dog walkers and often dogs in the Brook

Location description
Sampling location on footbridge going over the Dollis Brook