invertebrates have died and, subsequent to that, fish are dying. matt has started an online petition calling for a ban on sewage pollution in windermere. he said the waters here are close to ecological collapse. i have seen a decline in fish, invertebrates, freshwater vegetation. i have seen otter spraint completely absent of white—clawed crayfish. i have seen dead fish floating down the river past me. it is in a dire state and it will only get worse. algal blooms come and go, but they are appearing more frequently and they can be very harmful to humans and animals. there are two many main sources of sewage entering windermere. one is at the waste treatment site. that comes in when we have rain. they call it their storm overflow. a system. and the other is from septic tanks. there are over 1500 septic tanks that are around windermere itself and there is no regulation keeping these in check. last year, the sewage treatment plant at ambleside overflowed for weeks after heavy rain. what you can see is the fine filters at the back end.