Rowers in England's university Boat Race given health warning over E.coli levels in the Thames

The Oxford crew, right, throw their cox Colin Groshong into the Thames at the 155th Boat Race, in London, Sunday March 29, 2009. Jumping into London’s River Thames has been the customary celebration for members of the winning crew in the annual Boat Race between storied English universities Oxford and Cambridge. Now researchers say it comes with a health warning. (AP Photo/Tom Hevezi, File)

Jumping into London’s River Thames has been the customary celebration for members of the winning crew in the Boat Race, the nearly 200-year-old rowing contest between storied English universities Oxford and Cambridge.

Now it comes with a health warning.