Posted on October 22, 2014 by Bob Berwyn
Signs of oil and gas development are visible on a landscape level from 35,000 feet in the air.
Stable tracers can help pinpoint ground and surface water contamination
FRISCO — There’s more and more evidence that fracking wastewater can — and sometimes does — pollute ground and surface water, but it’s not always easy to trace the pollution, especially since drillers often keep secret their fracking fluid recipes.
But after field tests at a spill site in West Virginia and downstream from an oil and gas brine wastewater treatment plant in Pennsylvania, scientists say they can reliably identify hydraulic fracturing flowback fluids that have been spilled or released into the environment by using stable boron and lithium tracers that distinctive chemical fingerprints. Continue reading
Filed under: energy, Environment, fracking, gas drilling, oil drilling | Tagged: Environment, fracking, groundwater pollution, water quality | 1 Comment »
Posted on October 21, 2014 by Bob Berwyn
Fish-eating ospreys not showing signs of contamination
Ospreys so far are not picking up significant amounts of pharmaceutical pollution found in many streams and rivers around the world. bberwyn photo
FRISCO — Pharmaceutical compounds from makeup and drugs are turning up in streams and rivers all over the world, even in remote Yucatan cenotes, but for now, they don’t seem to be working their way up the food chain.
The chemicals have been finding their way into the environment, primarily through wastewater, urban runoff and even biosolids applied to agricultural lands, but he impact on wildlife is unknown, so researchers with the U.S. Geological Survey and Baylor University teamed up to try and track the pollutants through the food chain by testing ospreys. Continue reading
Filed under: Environment, water, water quality | Tagged: bioaccumulation, Environment, ospreys, pharmaceutical pollutants, water quality, wildlife | Leave a comment »
Posted on October 16, 2014 by Bob Berwyn
Is there mercury in your trout?
National assessment by USGS pinpoints regional mercury hotspots
FRISCO — Widespread mercury contamination is one of the many signs of continued global environmental degradation. Currently, there are fish consumption advisories for mercury in all 50 states in the U.S. Methylmercury concentrations in fish exceed the human health criterion in about one in four U.S. streams.
A new USGS report takes a comprehensive look at mercury contamination in streams across the United States, finding the highest concentrations in the Southeast and in the West, where some streams were degraded by historic mining activities.
Mercury is a potent neurotoxin that accumulates in fish to levels of concern for human health and the health of fish-eating wildlife. Much of the mercury originates from combustion of coal and can travel long distances in the atmosphere before being deposited. This can result in mercury-contaminated fish in areas with no obvious source of mercury pollution. Continue reading
Filed under: Environment, rivers, water, water quality | Tagged: Environment, mercury pollution, mercury stream assessment, USGS, water quality | Leave a comment »
Posted on October 6, 2014 by Bob Berwyn
How pure is your groundwater?
Iowa stream sampling shows common drugs turning up in well water
FRISCO — Research in a small stream near Des Moines, Iowa shows how pharmaceuticals and other hard-to-remove pollutants from treated municipal wastewater can travel into shallow groundwater following their release to streams.
“Water level measurements obtained during this study clearly show that stream levels drive daily trends in groundwater levels,” said Paul Bradley, lead author of the new U.S. Geological Survey study. Continue reading
Filed under: Environment, rivers, water, water quality | Tagged: Environment, groundwater, Persistent organic pollutants, pharmaceuticals, water quality | Leave a comment »
Posted on September 19, 2014 by Bob Berwyn
Microbeads are pathway for other environmental contaminants
FRISCO — Microplastics have long been documented as an environmental threat to oceans. European researchers recently warned of similar problems in Italian lakes, and now, Canadian scientists say they’ve found 2-millimeter plastic microbeads widely distributed along the bottom of the St. Lawrence River.
The team of researchers from McGill University and the Quebec government published their study this month in the Canadian Journal of Fisheries and Aquatic Sciences.
The paper explains that the pollution probably comes from cosmetics, household cleansers, or industrial cleansers, to which they are commonly added as abrasives. Owing to their small size and buoyancy, they may readily pass through sewage treatment plants. Microplastics are a global contaminant in the world’s oceans, but have only recently been detected in the surface waters of lakes and rivers. Continue reading
Filed under: Environment, rivers, water, water quality | Tagged: plastic microbead pollution, Stt. Lawrence River, water polluton, water quality | Leave a comment »
Posted on September 17, 2014 by Bob Berwyn
About half the nation’s streams are polluted by pesticides at a level of concern for aquatic life.
90 percent of urban streams show signs of contamination
FRISCO — A huge number of rivers and streams around the country are still polluted with pesticides that can kill bugs and other aquatic organisms at the base of the food chain.
Streams in agricultural areas are polluted at about the same level as they were 1990s, but pesticide pollution is increasing in urban streams, according to a U.S. Geological Survey study spanning about 20 years. Continue reading
Filed under: agriculture, Environment, rivers, water, water quality | Tagged: Environment, pesticides, pollution, water quality | Leave a comment »
Posted on August 25, 2014 by Bob Berwyn
The water may not always be as pure as it looks.
USGS takes close look at landfill water pollution
FRISCO — Water quality experts with the U.S. Geological Survey say chemicals from pharmaceuticals and personal-care products are widespread in water that has passed through landfill waste.
The researchers collected samples from water that has passed through landfills, — known as leachates — from 19 sites across the country as part of a national assessment, analyzing the water for 202 chemicals across a wide range of uses, including pharmaceuticals, hygiene products, home-use chemicals, pesticides and plastics. Of those 202 chemicals, 129 were found. Continue reading
Filed under: Environment, water, water quality | Tagged: landfill leachates, landfills, Persistent organic pollutants, USGS, water quality | 1 Comment »