I felt sick for a couple of days and afterwards I didn't want to go into the sea for a while.
The sewage from a drain near the harbour burst and the water actually turned brown.
It's disgusting, you should be able to go in the sea and not worry about getting ill.
Making a difference
I definitely think something should be done. Money has been spent on improving the local sewage works but it hasn't worked.
Whenever there's heavy rain we can expect the same problem.
It's really frustrating because I want to go in the water but I won't because you have to wait a few days for the water to return to normal.
Keep it clean
The government should do something about it but everyone can make a difference. My message to everyone is keep it clean.
People can help by not leaving litter on the beach. Don't go to toilet in the sea and think about what you flush down the loo.
Surfing at St Agnes and Chapel Port in Cornwall I've never seen any marine life.
I'm going on holiday to Portugal where I'm looking forward to going surfing. I think the water's going to be a lot cleaner."
Annie, 14, Cornwall
Why don't you write us a Press Pack report - and get it published on the site?!
It can be about anything that's happened in your local area - or your views on the news.
Have you ever had a run-in with a jellyfish?!
Visitors are ruining our beaches
