The quality of water at a Galway city beach is due to be reviewed today following its closure earlier this week due to elevated E.coli levels.

The levels were detected during routine testing at Grattan beach, within half a mile of the Mutton Island sewage treatment plant, and close to the Salthill venue for the international Ironman contest on September 2nd.

It was the latest in a series of beaches nationally where EU standards on bathing water quality were breached over the past week.

However, the upcoming international Ironman competition will go ahead despite the recent  contamination, organisers have said.

Organisers of the triathlon event, which is set to attract a number of Irish celebrities, said they were satisfied the dangerous bacterial contamination, which has led to the closure of Grattan Beach in Salthill, had not spread to the rest of the bay.

The 1.2-mile swimming leg of the triathlon will take place from the promenade in Salthill. Athletes will set off from Blackrock out into the bay and return to Palmer's Rock, along the promenade.

They will then complete a 90-km bike ride finishing with a run around Salthill.