Seagulls are 10 times more polluting to the country’s beaches than people, according to the latest water quality report from the Environmental Protection Agency (EPA).
The birds have been blamed as one of the reasons for the EPA’s decision to brand water quality at Merrion Strand in Dublin as poor, since they have taken to resting in large number on a sandbar.
“The droppings of a seagull in a single day carried about 10 times more concentrated bacteria than the waste from a human in a single day,” said EPA senior scientific officer, Peter Webster.
Six beaches, including Merrion, have been given “poor” grades, which means that local authorities will put up warnings to swimmers, but will not ban them from swimming there.
However, the EPA report found three-quarters of sites it inspected were “excellent” and 93.4 per cent met minimum EU standards - roughly in line with last year’s numbers.
Those classed as “poor” were Youghal, Co Cork; Duncannon Co Waterford; Rush south beach. Co Dublin and Ballyloughane, Co Galway all of which were first classed as “poor” in 2014, as well as Merrion Strand and Loughshinny in Dublin which were classified as poor for the first time in 2015.
No inland bathing areas were classified as having poor water quality.
EPA senior scientific officer Peter Webster said problems at Merrion Strand in south Dublin were “complex, on-going and difficult to resolve”.
Two factors had been identified. First was the presence the Trimleston and Elm Park streams which were found to be polluted with sewage. Mr Webster said this could be a result of “poor housing connections” from anywhere as far as the M50.
The second issue was an offshore sandbar which had become home to populations of seagulls and wading birds. The droppings of a seagull in a single day carried about ten times more concentrated bacteria than the waste from a human in a single day, he said.
The EPA said where bathing waters were classified as poor, the advice was not to bathe. Where such a classification was made, local authorities must publicise the advice, or in more extreme cases close the beach.
In a statement on Monday evening Fingal County Council said it had agreed a management plan for Loughshinny Beach bathing water with the EPA, “who are satisfied that the measures set out in the plan will achieve an improvement in water quality”.
In relation to the other coastal areas, remediation measures are being put in place by agreement between the local authorities and the EPA.
Mr Webster said a complicating factor in the report was that data was compiled over a four year period, so the data applying to 2015 was collected between 2012 and 2015.
In the case of Loughsinny a once-off event in 2014 had caused a major pollution leak, but previous years had pulled the overall result up. Since 2015 was marginally worse than 2011, “the data tipped” into the poor classification this year, he said.