Here’s a great post from the Planetizen Blog Crowdsourcing Clean Drinking Water, Interview with Sean Montgomery by Casey Brazeal, posted August 22, 2016. Sean Montgomery is the inventor of CitizenSpring (Kickstarter), an app that collects and maps data about safe drinking water. It’s currently a Kickstarter project.
CitizenSpring is a great example of how to use sensors and mapping to crowdsource data collection. The Planetizen interview has lots of good information for anyone interested in using sensors to crowdsource.