Access to safe drinking water is fundamental to public health, yet ensuring water safety requires more than a single test or measurement. Water quality can be affected by a wide range of contaminants—some visible, many invisible, making it essential to monitor multiple parameters to gain a complete and accurate understanding of water safety. For organisations working in environmental monitoring, humanitarian response, or rural water supply programmes, the challenge is even gr

Heavy metals such as lead, arsenic, cadmium, chromium and mercury can enter water sources through both natural and anthropogenic processes. Weathering of mineral deposits may release metals into groundwater, while industrial discharge, mining, agricultural runoff and corroding distribution systems can...