Observation

Brent Cross

River Brent

River or stream

View trends at this location

February 4, 2026 at 3:17 PM

QA status: Needs review

This observation is under review by Water Rangers, last updated on 2026-02-06, and has not been marked as checked yet. Details are below.

Review needed: Based on previous readings, conductivity's result of 509μS/cm is outside the expected range of 684.34-955.66μS/cm.

Weather observations

  • Current weather

    Community scientist interpretation

    • Sunny
    • Windy

  • Weather in the past 24hrs

    Community scientist interpretation

    • Cloudy
    • Rainy
    • Windy

Qualitative readings

  • Water flow

    Community scientist interpretation

    Steady

  • Water level

    Community scientist interpretation

    High

  • Algae

    Community scientist interpretation

    None

  • Pollution sources

    Community scientist interpretation

    Residential discharge

  • Colour

    Community scientist interpretation

    Yellow

Chemistry tests

  • Ammonia

    mg/L

    Hanna checker (ammonia - medium range)

    0.02

  • Conductivity

    μS/cm

    Other pen-type meter (conductivity)

    509

  • Turbidity

    NTU

    Turbidity tube (45 cm)

    23

  • Water temperature

    °C

    Other thermometer

    10.1

  • Air temperature

    °C

    Other thermometer

    11.6

  • Phosphates

    mg/L

    Hanna checker (phosphates - high range)

    0.7

Recent photos

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Location description
Footpath over River Brent near Fenwicks and NCR bus stop. Heavily canalised channel, wide, with concrete bed and vertical concrete walls. Down stream of Shirehall Park Weir and Brent Cross flyover Up stream of the confluence with the Clitterhouse brook. North circular road, shopping centre car parks on both sides. Shopping trolleys and lime bikes often feature here