Ammonia ppm
What's this?
0.68
Darlands Lake (Downstream) : Folly Brook/Dollis Brook
London, Barnet, United Kingdom

Observed by
Dianne Murphy
- Observed on: Sun, 22 Jun 2025 15:27:00 +0100
- Testers Dianne, Maggie, Neil
-
Associated with:
Thames21 : Brent Catchment Water Quality Working Group - Lat: 51.624755
- Lng: -0.2022708
Observation report
See trends at this locationWater quality tests
Pending Quality Check from Water Rangers What's this?
Water flow l/sec
What's this?
0.0
Conductivity μS/cm
What's this?
1,040.0
Turbidity NTU
What's this?
12.0
Air temperature °C
What's this?
24.4
Water temperature °C
What's this?
21.9
Phosphates total ppm
What's this?
1.24
Qualitative
Odour
What's this?
None
Clarity
What's this?
Clear
Water Flow
What's this?
Still
Water Level
What's this?
Low
Water Colour
What's this?
Yellow
On the water surface
What's this?
None
Weather
Current weather What's this?
Weather in previous 24 hours What's this?
Latest photos
Notes
Large sections of the brook were completely dry. Water was too low for riverfly monitoring due to long dry spell