Recent laboratory tests revealed elevated levels of coliform bacteria and other microorganisms in three wells near Žďár nad Sázavou. These contaminants pose a risk of gastrointestinal illness, primarily diarrhea. Health officials and water management experts advise against drinking well water without prior analysis. Unlike public water sources, wells are not subject to mandatory routine quality checks. The presence of a cup near a well does not guarantee water safety. Authorities emphasize the importance of testing well water before consumption to protect public health.