Testing of Cranleigh’s rivers has always taken place occasionally and now Surrey Wildlife Trust is helping to get more testing done and some improvements made.
Chemical levels are measured by groups of volunteers as are the numbers of river fly larvae, which indicate the health levels.
It is a fact that all sewage works clean the water as best they can before letting it go into the rivers. Here are two more facts:
- The levels of chemicals that remain, although allowed by government, are not good for wild life and cause the depletion of fish and their natural foods.
- In a flood situation, foul untreated sewage does come up in people’s homes which is why all the possessions have to be destroyed in the worst cases.
River dipping is a much needed and scientific past-time that some of us have undertaken on everyone’s behalf . We are hunting for river-flies as they are known, the tiny lavae of various species such as cadis fly, which are collected, counted and returned to the rivers. Afterwards the data collected is viewed by experts.
At a recent dip we found just one lava along with shrimps, and so the water is probably not to their liking, too many chemicals from somewhere.
We were dipping near to the back of Cranleigh Golf and Country club.