Tewkesbury Nature Reserve: Downstream of central foot bridge : River Swilgate

Cheltenham, Gloucestershire, United Kingdom

Observed by
Giles Alder
pH (0-14) What's this? 7.8
Ammonia ppm What's this? 2.9
Chlorine ppm What's this? 0.25
Hardness mg/L What's this? 400.0
Nitrates ppm What's this? 10.0
Alkalinity mg/L What's this? 120.0
Conductivity μS/cm What's this? 750.0
Air temperature °C What's this? 11.5
Water temperature °C What's this? 13.6
Phosphates total ppm What's this? 0.7


Current weather What's this?
  • sunny
Weather in previous 24 hours What's this?
  • rainy

Latest photos


This observation was taken the day after a pollution incident. It has been notified to the Environment Agency who took samples. Dead fish were seen yesterday. The cause was thought to be farm slurry. Unpleasant smell persisting today.

Extra reading of phosphate taken on Hanna checker. Reading was 2.08ppm