Category: water quality

Study tracks startling salinization trend in U.S. lakes

Road salt, development blamed for spiking chloride levels

Water quality in freshwater lakes near roads where salt is used is rapidly deteriorating. @bberwyn photo.

Staff Report

Lakes from New England to the Midwest are getting saltier from the massive use of chemicals to melt ice on roads, as well as from urban development. Under the current trend,  many North American lakes will surpass EPA-recommended chloride levels in 50 years, spelling trouble for aquatic ecosystems.

The majority of the lakes (284) were located in a North American Lakes Region that includes Connecticut, Maine, Massachusetts, Michigan, Minnesota, New Hampshire, New York, Ontario, Rhode Island, Vermont, and Wisconsin. Continue reading “Study tracks startling salinization trend in U.S. lakes”

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Sunday set: Wien scene

City sights …


A short photographic stroll through a city that consistently ranks near the very top worldwide for quality of life.  Vienna’s coffee houses and parks are definitely part of its charms, but it’s also a European hub science, culture, literature and tech innovation. And there are connections to my old stomping grounds in Colorado. For example, I spent several years following the story of how parasitic whirling disease wiped out most of Colorado’s rainbows, and how biologists were working to restore the popular game fish with a population resistant to the disease. Then last summer, as I was working on a story about a massive fish die-off in the Yellowstone River, my research led me to an Egyptian-born research scientist at the University of Vienna who has been studying various parasitic trout diseases, and linking them with global warming. Turns out that Mansour El-Matbouli also was an instrumental figure in the efforts to breed the strain of rainbow trout that are resistant to whirling disease, and that he had worked closely with aquatic biologists in Colorado that I also had interviewed for my stories in Colorado. We’re facing global environmental challenges, and they require a global and science-based response. It’s a small world.

Coal ash pollution poisoning fish in North Carolina

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Toxic pollution from coal-fired power plants builds up in fresh water fish. @bberwyn photo.

Trump’s proposed Cuts to federal regulations likely to lead to more environmental woes

Staff Report

Coal ash waste is poisoning fish in North Carolina lakes, scientists said this week announcing findings from a new study supported in part by the EPA. The research by scientists from Duke University showed that potentially harmful levels of selenium are building up because of emissions from coal-fired power plants.

“Across the board, we’re seeing elevated selenium levels in fish from lakes affected by coal combustion residual effluents,” said Jessica Brandt, a doctoral student in environmental health at Duke’s Nicholas School of the Environment, who led the study, published this month in the journal Environmental Science & Technology. Continue reading “Coal ash pollution poisoning fish in North Carolina”

Study tracks amphetamine pollution in Baltimore streams

Illegal drugs harming stream aquatic ecosystems

This is the local stream, Meadow Creek, that starts high in the Eagles Nest Wilderness Area and flows through our backyard.
A new study found that amphetamine pollution may be harming stream health. @bberwyn photo.

Staff Report

As if toxic waste from chemical manufacturing and other industrial processes weren’t enough, scientists say some streams are also being fouled by remnants of amphetamines — in some cases at high enough levels to alter the base of aquatic food chain.

A new study, published in the journal Environmental Science & Technology, traced the presence of illicit drugs at six  stream sites around Baltimore, focusing on the Gwynns Falls watershed, which is part of the Baltimore Ecosystem Study Long-Term Ecological Research program. Two rural streams were also sampled in the Oregon Ridge watershed, the closest forested region. Continue reading “Study tracks amphetamine pollution in Baltimore streams”

Pharmaceutical pollution widespread in Southeast U.S. streams

Many streams are at risk from pharmaceutical pollution

Cumulative median concentrations of pharmaceutical chemicals detected during the sampling conducted in June of 2014 in 59 small streams. The four urban study areas are shown in boxes, with details in the study.
Cumulative median concentrations of pharmaceutical chemicals detected during the sampling conducted in June of 2014 in 59 small streams. The four urban study areas are shown in boxes, with details in the study. Via USGS.

Staff Report

Traces of pain-relieving substances, diabetes drugs and allergy medicines are widespread in small streams across the Southeast, especially in urban zones like Raleigh, North Carolina, the U.S. Geological Survey found in a new study.

The USGS in 2014 sampled 59 small streams in portions of Alabama, Georgia, North Carolina, South Carolina and Virginia for 108 different pharmaceutical compounds and detected one or more pharmaceuticals in all 59 streams. The average number of pharmaceuticals detected in the streams was six. Continue reading “Pharmaceutical pollution widespread in Southeast U.S. streams”

Study eyes climate threat to Crater Lake

Warming temps could affect clarity, quality of famed Oregon lake

crater lake climate change
A new study shows how global warming may affect Crater Lake. Photo courtesy National Park Service.

Unique climatic conditions that combine to make Oregon’s Crater Lake one of the clearest bodies of freshwater in the world are expected to become more rare as the Earth gets warmer. The changes could impair the lake’s clarity and health, scientists said in a new study published in early May by the U.S. Geological Survey. Continue reading “Study eyes climate threat to Crater Lake”

Blue River loses gold medal trout stream designation

Low flows, habitat destruction degrade fishery

Summit County Colorado photography
Sunrise along the Blue River in Summit County, Colorado. @bberwyn photo.
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Biologists and volunteers count trout in the Blue River just below Dillon Reservoir and the Dillon Dam. @bberwyn photo.

Staff Report

Colorado’s continued unsustainable use water has taken a toll on trout in the Blue River, where Colorado Parks and Wildlife biologists have decided to remove the gold medal designation from a 19-mile reach stretching from just north of Silverthorne to Green Mountain Reservoir.

According to CPW aquatic biologist Jon Ewert, unnatural stream flows, sparse aquatic invertebrate populations, low nutrient content and degraded habitat all contributed to the decline of the fishery. The agency said that stretch of the river hasn’t met the Gold Medal standard for about 15 years.

There’s better news farther downstream, where CPW designated a 24-mile reach of the Colorado River, from Canyon Creek, at the mouth of Gore Canyon, to the confluence of Rock Creek, near the town of McCoy, as a new gold medal fishery. In Colorado, Gold Medal status is reserved for state waters that produce a minimum of 60-pounds of trout per acre and 12 trout measuring 14-inches or longer per acre. Continue reading “Blue River loses gold medal trout stream designation”