Browsing Category: Water Quality

Agriculture, Environment, Water Quality

How Old Is Your Nutrient Pollution?

When a stream is polluted, people often ask “Where did the pollution come from?” After a clean-up plan is implemented, people will ask “Is the stream cleaner now?” We rarely ask “When was that pollution emitted?” or “When will the stream be cleaner?” The time scales of hydrologic systems…

By Teresa Culver-
Agriculture, Water Quality

Groundwater Access, Poverty and Conflict in India

Groundwater is a vital resource around the world. Groundwater irrigation has ensured food security in many parts of the world, and some estimates suggest groundwater irrigation sustains as much as half of world food production. Hence, promoting sustainable use of groundwater should be at the center of water policy discussions…

By Sheetal Sekhri-
Environment, Water Quality

Q&A With Lex Van Geen on Arsenic Contamination

Lex Van Geen is a world-renowned arsenic specialist at Columbia University’s Earth Institute. He has been working on arsenic contamination for 20 years, especially (but not only) in Bangladesh. The World Health Organization has called Bangladesh’s arsenic problem “the largest poisoning of a population in history.” On…

By Peter Debaere-
Environment, Water Quality

The Hard and Soft of Freshwater

Legend for map: Changes in salinity of U.S. inland waters where warmer colors indicate increasing salinity and cooler colors decreasing salinity. Dots are USGS sampling sites (Map by Ryan Utz, Chatham University).I remember when my parents bought a water softener after a family move. We had never had…

By Mike Pace-