Arsenic is now recognized to be one of the world’s greatest environmental hazards, threatening the lives of several hundred million people. Naturally occurring arsenic leaches into water from surrounding rocks and once in the water supply it is both toxic and carcinogenic to anyone drinking it. New research finds that most of the current technologies used around the world to reduce arsenic contamination are ineffective.

A conference of 500 leading water scientists from around the world, held last week in Bonn, issued a stark warning that, without major reforms, “in the short span of one or two generations, the majority of the nine billion people on Earth will be living under the handicap of severe pressure on fresh water, an absolutely essential natural resource for which there is no substitute. This handicap will be self-inflicted and is, we believe, entirely avoidable.”

The U.S. water infrastructure is often called the “invisible infrastructure” – a vast, largely invisible network of pipes and tunnels — nearly 1.4 million miles span across the United States, which is eight times the length of the U.S. highway system. Much of the U.S. infrastructure was built more than a century ago, and currently around 10 percent of these systems are at the end of their service life. If not addressed by 2020, this number could rise to 44 percent. A summit meeting of the U.S. water community calls on Congress to make water infrastructure a top national priority.

After virtually eliminating arsenic as a useful tool for homicide, science now faces challenges in doing the same for natural sources of this fabled old “inheritance powder” that contaminates water supplies and food, threatening more than thirty-five million people worldwide.

A filtration system based on a medicinal herb can quickly and easily remove “fluoride” from drinking water, say researchers in India. The technology uses parts of the plant Tridax procumbens as a biocarbon filter for the ion.

Canadian agriculture is faced with great opportunities, but also challenged by water — related risks and uncertainties. An expert panel convened by the Council of Canadian Academies has found that water and land resources in Canada can be more sustainably managed by developing forward — thinking policies and effective land and water management strategies, adopting effective governance mechanisms, and harnessing technological advancements.

The amount of water available for people and ecosystems is the amount of annual precipitation — that is, snow or rain — minus the amount of annual evapotranspiration.  Evapotranspiration itself is the amount of water lost to the atmosphere from the ground surface. Scientists map the long-term U.S. evapotranspiration rates for the first time.

The University of Alberta will unveil new technologies its researchers and students will use to replace inadequate water purification and monitoring equipment in remote communities in Canada and India.

Despite these advances made under the Clean Water Act, sewage remains a major source of pharmaceuticals and personal care products (PPCPs) and naturally occurring hormones found in the environment. New research shows the effectiveness of rural lagoon systems at removing these compounds from wastewater.