Magic:
each year the Mediterranean gets cleaner !
more and more beaches get the coveted blue flag !

Wonderful...
Minor detail: measurements are usually made by national authorities, before the start of the tourist season, and after local officials have been notified that the surveyors are due to arrive, so that they make the necessary preparations...

Extra: see a not so blue, blue flag sign at https://ecoclub.com/news/082.pdf