The United States Geological Survey (USGS) has a new app for mobile devices. This is a great tool for anyone who enjoys paddling on water trails or for floodplain dwellers who like to keep tabs on a rapidly rising stream.
The tutorial page takes a few minutes to review. It's an easy, intuitive app to use, especially if you already use Google Maps or some other app to monitor stream data. Simply type this link into your mobile device browser: m.waterdata.usgs.gov
This is a Beta Release so if you encounter problems USGS has a page you can visit for reporting problems.