Where have OPAL Water Surveys been carried out so far? What is water quality like in ponds across the UK?
The map below shows the distribution of OPAL Water Surveys from March 2010 to November 2015.
What the results mean
- 0-5 This lake or pond could be improved
- 6-30 This lake or pond is quite healthy
- 31+ This lake or pond is very healthy
Find out more
- Please contact OPAL if you have any queries.