A town in western Germany was hit with a water contamination warning after authorities raised the alarm that the water supply might have been tampered with. Following a preliminary analysis of water samples in Mechernich, officials said on Friday morning that they could largely rule out the presence of foreign chemicals and biological substances but that residents should still take care when using any water, according to domestic media. This includes boiling water before consuming it, only using it for domestic purposes, and stockpiling drinking water as a precaution. The town of Mechernich ho…