'Poor' water quality beaches to show 'don't swim' signs
31 May 2013 Last updated at 08:33 BST
If you saw a big sign on a beach telling you not to go in the sea, would that put you off?
Tougher new European water quality standards come in from 2015. It means beaches classed as 'poor' will have to display a sign telling visitors not to swim there.
There are worries over the impact that could have on tourism.
Joe reports from Blackpool beach, where the water regularly fails to meet clean standards.