Fingal's mayor has said she's "absolutely delighted" the area now boasts three Blue Flag beaches.
For the first time, Balcarrick Beach in Donabate and South Beach in Rush join Portmarnock on the international excellence scheme, which rewards water quality and criteria including facilities for visitors, beach management and environmental education.
They are among some 90 beaches that received Blue Flags around Ireland.
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Beachgoers at Balcarrick will be elated as this "gem of a beach" was also presented with a Green Coast Award.
Green Coast awards recognise beaches with excellent water quality and appropriate management to ensure protection of the natural environment, with a particular emphasis on community involvement.
All Green Coast beaches are managed by the local authority in cooperation with local clean coast groups.
Mayor of Fingal, Cllr Seána Ó Rodaigh, said: "I'm absolutely delighted to hear about the awarding of three blue flags to beaches in Fingal. We have two wonderful new additions this year, with Balcarrick in Donabate and South Beach in Rush being recognised, and it’s fantastic that Velvet Strand in Portmarnock has once again retained its status.
"It's also significant that Balcarrick Beach has been awarded a Green Coast Award which recognises beaches of high environmental quality.
"For any of us who love the 88km of our picturesque coastline, those of us who like to walk on the beach or for anyone who likes to get in the sea, this is brilliant news. Well done to everyone in the council and our community for making this happen."
Director of Operations at Fingal, Mary T Daly, also welcomed the announcement.
She added: "Increasing the number of Blue Flags is a recognition of the excellent work of the Council and local community groups in ensuring that our beaches are managed carefully to the highest standard.
"With Bathing Season set to begin from 1 June, more people are expected to take advantage of beaches all along the Fingal coastline, so having these accolades at three of our beaches is testament to what we can offer the local community and visitors alike."
Under the international Blue Flag programme, local authorities around the world must continue to meet specific criteria if they want to retain their beaches' blue flag status.
Among the guidelines is a rule which means dogs or pets - other than assistance dogs - are not permitted on a Blue Flag beach.
Authorities at Fingal say this is especially important in terms of maintaining an excellent water quality, with overwhelming evidence connecting bathing water contamination to dog poo. Analysis shows that just one dog foul left behind can result in contamination the size of a tennis court.
For up to date water quality reports for Beaches see www.beaches.ie
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