Mysterious pink waters appear in small lake near Igoumenitsa, Greece

An unusual phenomenon has transformed a small lake near Igoumenitsa, Greece, into a vibrant pink-fuchsia hue, sparking concern and curiosity among residents and visitors. The striking color change was observed on the water's surface at a small lake located on Makrygiali Beach, along the route towards Bouka.

While the exact cause remains undetermined without further analysis, experts propose a couple of plausible explanations rooted in microbial activity. One leading theory points to the massive growth of halophilic microorganisms, specifically purple sulfur bacteria. These bacteria are known to thrive in environments with high salinity and can impart a distinctive reddish or purplish color to water bodies.

Such phenomena are typically observed in shallow, stagnant waters where increased salinity due to evaporation, high temperatures, and low oxygen levels create ideal conditions. The decomposition of organic matter can also contribute to the proliferation of these microorganisms. Another possibility is the presence of the microalgae Dunaliella salina, which flourishes in highly saline waters and produces red or orange pigments.

However, laboratory analyses in other regions have often attributed similar intense magenta colors to purple sulfur bacteria. While the vibrant coloration itself is not definitive proof of pollution from sewage or chemical substances, the possibility of environmental contamination cannot be entirely ruled out. Local authorities, including the Municipality of Igoumenitsa and the Epirus Region, are being urged to promptly investigate the matter through water sampling and laboratory testing to ascertain whether this is a natural, seasonal microbial event or an indicator of environmental stress.