Waterborne

“American cities in the late 19th, early 20th century were incredibly unhealthy places,” says Richard White, professor emeritus of American history at Stanford University in California. “High child death rates, repeated epidemics, and much of that was waterborne disease that came from both ineffective sewage and impure water. And infrastructure projects changed that dramatically. Probably it's been the most effective public health effort ever in the history of the United States.”

Until now, little research had been done into how eutrophication might affect waterborne parasites, which cause health problems ranging from skin rashes to river blindness.

Without water, the risk of waterborne diseases increases in the population.