Copenhagen - Water quality on Europe's beaches has steadily improved in recent years, with the vast majority boasting excellent quality, according to the European Environment Agency (EEA).
Among 22,295 bathing spots studied last year, 84.6 percent had "excellent" water quality, the report published by the EEA on June 8 has found.
Since 2013, the number of sites in this category has risen by 2.2 points to 87.4 percent for coastal bathing waters, and by 2.6 points to 79.1 for inland bathing waters.
Researchers studied the water for bacteria indicating pollution caused by sewage or water drainage from farms.
How clean are Europe's beaches?
Water quality can be classified as "excellent", "good", "sufficient" or "poor", depending on the level of faecal contamination detected.
Polluted waters can, if ingested, cause illness, including gastrointestinal problems and diarrhoea.
Countries with waters qualified as "poor" should ban bathing or advise against it, the EEA said.
Albania registered the highest number of sites with poor water quality, at 5.9 percent, but the number has nonetheless been halved in four years thanks to the construction of water treatment plants.
Cyprus tops survey of water quality at European beaches
Water quality tends to be better in coastal areas, thanks to their capacity for self-purification.
"Moreover, many central European inland bathing water sites are situated on relatively small lakes and ponds as well as low flow rivers, which, especially in the summer, are more susceptible than coastal areas to short-term pollution caused by heavy summer rains," the report said.
Cyprus topped the report, with 99.1 percent of its beaches boasting excellent water quality.
The study covered EU member states as well as Albania, the UK and Switzerland.
Greece, popular with tourists for its beaches, came in fourth at 95.7 percent, behind Austria and Malta.
They were followed by Croatia, Germany and Portugal, while Denmark, Italy and Spain tied in eighth place with 88.4 percent.
The EEA noted that in general, beaches on the Mediterranean tended to have cleaner water.
"The European results show better quality in the Mediterranean, partly explained by low or no rain during the summer, more sun (sunlight kills bacteria) and deeper water at the beaches," EEA water quality expert Peter Kristensen told AFP.