Barnes Common Riverfly site : Beverley Brook

London, Richmond upon Thames, United Kingdom

Observed by
Rachel Walker

Observation report

See trends at this location

Water quality tests

Pending Quality Check from Water Rangers What's this?

pH (0-14) What's this? 7.5
Dissolved oxygen mg/L What's this? 10.1
Ammonia ppm What's this? 1.09
Chlorine ppm What's this? 0.0
Hardness mg/L What's this? 400.0
Nitrates ppm What's this? 7.5
Alkalinity mg/L What's this? 120.0
Water depth m What's this? 0.41
Conductivity μS/cm What's this? 1,078.0
Air temperature °C What's this? -2.0
Water temperature °C What's this? 5.2
Phosphates total ppm What's this? 0.61

Weather

Current weather What's this?
Some cloud with blue skies.
Weather in previous 24 hours What's this?

Latest photos

No photos uploaded.

Notes

Riverfly score 10/1/25 - 7
Caddisflies: cased 18 (5 were large leaf cased caddis) / caseless 7
Olives: 3
Gammarus: 173
Also: 4 large damselfly nymphs.