Observation

Folly pre confluence

Folly Brook

River or stream

View trends at this location

November 4, 2025 at 9:35 AM

QA status: Reviewed: quality check complete

Weather observations

  • Current weather

    Community scientist interpretation

    • Sunny
    • Cloudy
    • Windy
  • Weather in the past 24hrs

    Community scientist interpretation

    • Sunny
    • Cloudy
    • Rainy
    • Windy

Qualitative readings

  • Clarity

    Community scientist interpretation

    Clear

  • Water use

    Community scientist interpretation

    other

  • Colour

    Community scientist interpretation

    Clear


Plants/wildlife

  • Algae

    Community scientist interpretation

    None


Issue reporting

  • Odour

    Community scientist interpretation

    Natural

  • 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

    mg/L

    Hanna checker (ammonia - medium range)

    0.22

  • Conductivity

    μS/cm

    Other pen-type meter (conductivity)

    795

  • Water temperature

    °C

    Other thermometer

    13.1

  • Phosphates

    mg/L

    Hanna checker (phosphates - low range)

    0.40

  • Air temperature

    °C

    Other thermometer

    13.1

  • Turbidity

    NTU

    Turbidity tube (45 cm)

    <= 12

Recent photos

View more photos ›

Notes

Testers Jude and Nicky Water running from Folly down to the Dollis after recent rain, rather than pooled as in previous sessions in the summer, so Ammonia and Phosphate levels diluted rather than concentrated

Location description
Folly Brook just before joining the Dollis brook