Swimming restrictions have been lifted at Killiney and Seapoint beach.
They were put in place after tests showed levels of E Coli bacteria in the water.
However there's still a ban on bathing at Blackrock Baths.
Dun Laoghaire Rathdown County Council says results from further samples are due back on Wednesday the 5th of July.
Last week a fundraising swimming race for Special Olympics Ireland had to be cancelled due to the notice.