Confusion reigned today over the safety of Sussex seawater.

People were asking "are bathers at risk?" after European health officials warned that from 2015 seawater samples will be subject to far stricter tests for harmful bacteria.

Under the new guidelines, Worthing's water quality, currently deemed "sufficient", would be reclassified as "poor".

Now other Sussex resorts including Eastbourne, Littlehampton and Bognor will study the details of the crackdown to find out how they are affected.

At present beaches are regarded as safe if the risk of getting a stomach upset or ear infection is below 15 per cent.

Under the revised rules, the acceptable level will be reduced to just eight per cent, making Worthing "unsafe for bathing".

Southern Water said all bathing waters would have to reach at least "sufficient" status by the end of 2015.

John Spence, wastewater and environmental strategy manager for Southern Water, said: "If we take the period 2002 to 2004 then Worthing would be 'sufficient'.

"However, if we take the data from 2003 to 2005 Worthing falls into the 'poor' category.

"We will work with the Environment Agency to identify any improvements that are required to Southern Water assets to meet the revised standard.

"The Agency will also look at all of the other factors that can affect bathing water quality."

Southern Water said test results could be contaminated by dirty rainwater running off the land into the sea, shipping discharges, seabird droppings and dog waste.

Worthing's town centre beach currently holds a Seaside Award, which is regarded as a poor relation to the prestigious European Blue Flag.

Haydn Smith, Worthing borough council's assistant director of health, said: "The borough council has yet to meet with the Environment Agency or Southern Water to discuss these new standards but the council's view is the quality of discharges should be improved in any event.

"The council is keen to obtain a Blue Flag for its bathing beach. If the opportunity arises for extra treatment facilities this would be welcome."

Coun Paul High, cabinet member for leisure and cultural services, said: "It is a matter of concern and I hope Southern Water will react and do something to improve water quality.

"They have a duty to do so."