We based our decision on evidence. We looked for two things over a sustained period: a return to normal numbers of dead birds and other wildlife, and a return to normal water quality.

Over the last three weeks, the number of deaths has fallen back to usual levels, with only two dead birds seen in our most recent count. Oxygen levels in the water have also returned to normal. This matters because low oxygen is one of the main triggers for the bacteria that cause botulism to produce toxins.

Visitors can enjoy Castle Water safely again by following this simple guidance:

If you find a dead or sick bird

  • Do not touch or approach sick, injured or dead birds.
  • Keep children and dogs well away.
  • Wash your hands before eating and after visiting the reserve.

Keep to designated footpaths and viewing areas

  • Stay on established paths.
  • Do not swim or enter the water.
  • Avoid water that looks discoloured, scummy or has surface mats.

Keep dogs on leads

  • Keep dogs on a lead at all times.
  • Do not let dogs swim, paddle or drink from any water.
  • Stop dogs approaching or eating dead birds, fish or other wildlife.
  • Clean your dog’s paws and fur after walks, especially if they have been in mud or water.

We will keep monitoring the situation closely. Thank you to all our visitors for your continued support and cooperation.