"Scientists have found evidence of a 'drastic' shift since the 1970s in north Atlantic Ocean currents that usually influence weather in the northern hemisphere, Swiss researchers said on Tuesday."

New York regulators are working on a new plan that may limit more tightly the use of the pesticide aldicarb -- which has shown up in the shallow aquifer on which Long Island is especially dependent for drinking water.

"Changes in Iowa's weather patterns, landscape, cities and farms have rendered some of the state's most trusted flood prevention safeguards outmoded and inadequate, a review by The Des Moines Register shows."

"Heavy storms ruptured mains and disabled pumps, spilling thousands of gallons of sewage into the ocean along Southern California's coast."

"The lawsuits being filed against the Environmental Protection Agency are piling up, and more are likely to come following the agency’s decision to set nutrient pollution limits for Florida’s waters."

"Southern California laid miles of pipe and tunneled through mountains to import water. But it also built a storm drain system to quickly get rid of rainfall. The contradiction played out again this week."

"The Environmental Protection Agency is suggesting that water utilities nationwide test their drinking water for hexavalent chromium, a probable carcinogen, after an independent survey released earlier this week found the chemical in tap water drawn from 31 cities."

Water shortages in the Southwest may be postponed for a while after Mexico agreed to store some of the Colorado River water it is entitled to in U.S. reservoirs while it repairs canals and pipelines damaged in a recent earthquake.

"Congress on Friday sent President Barack Obama a bill that would significantly reduce exposures to lead in drinking water."