Rich Gradoville visits the streams near his home in Johnston, Iowa, not for fishing or recreating, but to test the nitrate concentration of the flowing water.

Plus, Great Smoky Mountains National Park is the most popular outdoor attraction in Tennessee. It was the most visited U.S.

Since golden mussels were recently identified in the Sacramento-San Joaquin Delta, waterways in parts of Northern California and the Bay Area have introduced new rules for boaters.

Research on Wax Lake’s land-building success has been enlisted in the fight against the rapid disappearance of the coast ...

It will take days for major floodwaters to work their way south through the Mississippi. Flooding will persist through April.