Šmartinsko Lake: water currently suitable, but still cautious in certain places

The water in Šmartinsko Jezero is currently considered safe for recreational use, according to recent sampling results obtained by the City Municipality of Celje. The National Laboratory for Health, Environment and Food (NLZOH) conducted tests at both eastern and western parts of the lake earlier this month. The findings indicated favorable microbiological conditions with no signs of increased microbial load. At the eastern sampling site, no visible pollution or surface scum was observed. In contrast, at the western location, some surface scum was detected alongside natural contaminants such as pollen, leaves, and wood debris. A new sample collected today, August 17, showed no visible scum. An official report on the latest testing will be available within ten days. Authorities have issued a cautionary advisory, emphasizing that while the current water quality appears acceptable, certain areas require careful attention. Regular sampling procedures for bathing waters do not specifically include analyses for cyanobacteria or their toxins, meaning their presence cannot be confirmed based on the latest report. Visible surface scum could potentially indicate the growth of cyanobacteria, prompting officials to recommend that visitors avoid areas where such phenomena are observed and refrain from direct contact with the scum or consumption of the water. Special attention should be given to children, and dog owners are advised against allowing pets to swim or drink in areas marked by visible scum. The municipality has noted that the occurrence of scum can be localized and subject to change depending on weather conditions and water movement. Therefore, they advise visitors to check the current state of the water before entering. They clarified that the observation of scum at one sampling point does not necessarily mean the entire lake is unsuitable for recreation. This assessment comes despite the fact that Šmartinsko Jezero is not officially designated as a bathing area, which means swimming occurs at the individual’s discretion. Unlike Velenjsko Jezero, which also lacks formal designation as a bathing site, Šmartinsko Jezero does not provide lifeguards or rescue services. As a result, responsibility for safety lies entirely with individuals using the lake. This underscores the importance of personal vigilance and adherence to local guidelines, especially during periods of potential water quality changes. The situation highlights the need for ongoing monitoring and public awareness, particularly regarding the risks associated with algal blooms and related contaminants. While the immediate test results suggest the water is generally safe, the presence of visible scum necessitates a cautious approach. Visitors are encouraged to remain informed and take necessary precautions to ensure their safety and the safety of others. The municipal authorities continue to monitor the situation and will update the public as further information becomes available.