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”

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?’”

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?”

THE RUSSIAN RIVER: ALL RIVERS Screenings

To All, Don McEnhill, Executive Director of Russian Riverkeeper is a featured interview in: THE RUSSIAN RIVER: ALL RIVERS – THE VALUE OF AN AMERICAN WATERSHED “The time of using greed to justify degrading our environment is over.” “We need to get very honest with the amount of water we have in the worst year. … Continue reading “THE RUSSIAN RIVER: ALL RIVERS Screenings”

Study finds steroids may persist longer in the environment than expected

University of Iowa-led research shows some drugs can partially regenerate themselves Assessing the risk posed to aquatic organisms by the discharge of certain steroids and pharmaceutical products into waterways is often based on a belief that as the compounds degrade, the ecological risks naturally decline. But there’s growing sentiment that once in the environment, some … Continue reading “Study finds steroids may persist longer in the environment than expected”

The 16th Annual Coho Confab

The 16th Annual Coho Confab will be held in the Mattole River Valley. Salmonid Restoration Federation and Trees Foundation are the permanent co-hosts of this educational event and are excited to be partnering this year with the Mattole River and Range Partnership that includes Sanctuary Forest, Mattole Restoration Council, and the Mattole Salmon Group. The … Continue reading “The 16th Annual Coho Confab”

Comment on Low Dose Hormones article

Hi all! I just received this article, EPA Responds to Scientists’ Concerns about Low Dose Hormones,  stating that the EPA will begin to study low dose effects of endocrine disrupting chemicals. It is just a first step, but an incredibly important one. This can represent a sea change in how toxicity is assessed and may … Continue reading “Comment on Low Dose Hormones article”

Public Hearing on Amendment to the Recycled Water Policy

NOTICE OF PUBLIC HEARING CONSIDERATION OF ADOPTION OF AN AMENDMENT TO THE RECYCLED WATER POLICY CONCERNING MONITORING REQUIREMENTS FOR CONSTITUENTS OF EMERGING CONCERN NOTICE IS HEREBY GIVEN THAT the State Water Resources Control Board (State Water Board) is holding a hearing to consider the adoption of a proposed amendment to the Recycled Water Policy. The … Continue reading “Public Hearing on Amendment to the Recycled Water Policy”

EPA to Begin Study of Low Dose Effects of Endocrines

Hi all! I just received this article stating that the EPA will begin to study low dose effects of endocrine disrupting chemicals. It is just a first step, but an incredibly important one.  This can represent a sea change in how toxicity is assessed and may be the beginning of the end for the theory … Continue reading “EPA to Begin Study of Low Dose Effects of Endocrines”