In Sheringham the water quality has been rated as excellent in samples taken between 2021 and 2024, external. So far this year, 15 samples have been collected from this location.
However, the agency advises against swimming in three areas in the East: Heacham, in Norfolk, Clacton, in Essex, and at Sheep’s Green on the Cam in Cambridge.
Sheep’s Green, external was one of 27 sites in England to receive designated bathing water status in May 2024 but is rated as having poor water quality.
Mr Raine added: “I wouldn’t advise swimming after a heavy downpour as you’ll see lots of urban run-off from streets and pavements, you’ll see run-off from agricultural land and you also could potentially get sewage spills.
“Water companies have done huge investments over the past few years to make sure that that most of the sites around our coast have ultra violet filtration and treatment so that kills 99% of the bacteria.
“If bacteria has got into the water, it can still have an impact.”
He said people should also consider if the beach they are visiting has Blue Flag status.