U.S. Geological Survey researchers say rising levels of nitrate and selenium in Canada’s Elk River are unparalleled in the annals of modern monitoring.
Nitrate contamination of well water has been a decades-long problem in the San Joaquin and Salinas valleys — and now stormwater has flushed more fertilizer and manure into aquifers.
In recent years, record heat and low rainfall have taken a toll on Germany's groundwater, even in the winter. Experts say it's time to radically overhaul the way the country manages its water.