If you're looking for ways to use less water, Instructables user tamberg developed a DIY water faucet sensor that shows you when you've used up a liter. Using an Arduino, flow sensor, and colored LEDs ...

A new sensor can detect 'forever chemicals' known as PFAS (perfluoroalkyl and polyfluoroalkyl substances) in drinking water. PFAS are found in many consumer products and are linked to cancer and other ...