Sea swimmers will now be able to find out the quality of the water they choose to take a dip in during this summer.
A new testing regime has now come into force checking the quality of the waters at Chapel Beach in Port St Mary, Port Erin, Ramsey South and Douglas - they'll be tested each week and graded as as either sufficient, good or excellent.
The results will be displayed on beach side signs at each of the locations and on the government website.
Sampling will take place throughout the summer season until September 18.
Environment, Food & Agriculture Minister, Geoffrey Boot MHK, says: "The higher standards bring us in line with neighbouring countries and protect public health while further enhancing the Island’s UNESCO Biosphere pledge.
"The designations empower bathers to make informed decisions and we are working with other local authorities to help them reach the standard."
Officials add the results will also form a unique bathing water profile showing information on the catchment area, river discharges, Manx Utilities infrastructure and pollution investigations.
All local authorities were invited to apply for the designation and government says it's working with those which were initially unsuccessful.
Sampling will also take place at the most popular non designated beaches on a monthly basis in case of future applications for designation from local authorities.