Emerging wastewater contaminant metformin causes intersex and reduced fecundity in fish

Nicholas J. Niemuth, Rebecca D. Klaper Highlights Fish were exposed to metformin at concentrations relevant to wastewater effluent. Exposure from early life stages to adulthood caused intersex in male fish. Exposure caused a reduction in fecundity and in overall size of male fish. Results suggest that metformin is a potential endocrine disruptor in the environment. … Continue reading “Emerging wastewater contaminant metformin causes intersex and reduced fecundity in fish”

Endocrine Disruptors: The Secret History of a Scandal

To River Watch readers: Our website has had several articles in the past on the impacts of endocrine disruptors in streams and other waters of the USA. Most of these chemicals come from pharmaceutical sources released through normal waste discharge without being filtered or treated. What has been revealed is that, unlike many other potentially … Continue reading “Endocrine Disruptors: The Secret History of a Scandal”

The Key to Halting Damage to 36,000 Miles Of U.S. Waterways Annually

To All, This is a message from Karen of Clean Water Network that should be of interest to River Watch members and supporters. Larry Exposed Soil = Pollution  The Key to Halting Damage to 36,000 Miles Of U.S. Waterways Annually Hello CWN members, I’m Richard Klein.  I’ve been helping folks throughout the U.S. win sediment … Continue reading “The Key to Halting Damage to 36,000 Miles Of U.S. Waterways Annually”

Innovative Device traces Chemicals affecting Human and Environmental Health

February 24, 2016 by Richard Harth Every hour, a multitude of chemicals complete their use life in homes, agricultural fields and industries and flood into the environment. The ultimate fate of these compounds is often poorly understood, as are the risks they may pose to humans and the ecosystems that are essential for our survival … Continue reading “Innovative Device traces Chemicals affecting Human and Environmental Health”

Sludge as New Sentinel for Human Health Risks

January 16, 2014 by Richard Harth Thousands of chemicals serving a variety of human needs flood into sewage treatment plants once their use life has ended. Many belong to a class of chemicals known as CECs (for chemicals of emerging concern), which may pose risks to both human and environmental health. Arjun Venkatesan, a recent … Continue reading “Sludge as New Sentinel for Human Health Risks”

Does ‘the Dose make the Poison?’

Extensive results challenge a core assumption in toxicology by Pete Myers, Ph.D. and Wendy Hessler The “dose makes the poison” is a common adage in toxicology. It implies that larger doses have greater effects than smaller doses. That makes common sense and it is the core assumption underpinning all regulatory testing. When “the dose makes … Continue reading “Does ‘the Dose make the Poison?’”

CA Assessment Strategy for Freshwater Algal Blooms

Speaker: Beverley Andersen-Abbs State Water Resources Control Board January 28th 12:00 – 12:30 p.m. CalEPA HQ Building, Training Room 2 East and West https://stateofcaswrcbweb.centurylinkccc.com/CenturylinkWeb/JarmaBennett If you have more question, please contact: ·         Dawit Tadesse at dawit.tadesse@waterboards.ca.gov or (916) 341-5486 ·         Michelle Tang at Michelle.Tang@waterboards.ca.gov or (916) 341-5504 Best, Greg

Is everything we think we know about chemical toxicity wrong?

May 30, 2012 at 5:54 pm Yes,  if the first comprehensive review of the issue in a decade is correct in concluding that low doses of chemicals can harm health. Although the hypothesis that chemicals can have health effects at doses much lower than those routinely tested in the toxicological evaluation of chemicals is much-discussed, … Continue reading “Is everything we think we know about chemical toxicity wrong?”

Public Hearing on Russian River Pathogens

To All, This is from the North Coast Regional Water Board. The public hearing scheduled for November 19, 2015, to consider adoption of the proposed Russian River Watershed Pathogen Indicator Bacteria Total Maximum Daily Load (TMDL) has been postponed. Instead, at the public meeting to be held on November 19, 2015 at 5550 Skylane Blvd., … Continue reading “Public Hearing on Russian River Pathogens”

EPA Strengthens Federal Protections for Small Streams

By Darryl Fears, May 27 The U.S. Environmental Protection Agency and the U.S. Army finalized the Clean Water Rule to protect from pollution and degradation of the nation’s water resources in streams and wetlands. EPA strengthens federal protections for small streams The U.S. Environmental Protection Agency and the U.S. Army finalized the Clean Water Rule … Continue reading “EPA Strengthens Federal Protections for Small Streams”