In this section you’ll find hardware and software tools for different water sources based on source types (e.g. rainfall, surface water, ground water, waste water etc.) and well as collection systems (e.g. individual or centralised collection, open dug well, bore well, rainwater harvesting etc.). Selecting appropriate tools, it is important to analyse the interlinkages with other areas of the water and nutrient cycle by asking the question “What influences your water sources?” This may concern the form of wastewater treatment in the locality, a lack of wastewater treatment in an upstream community or the water consumption of local industries, agriculture or households; etc.