10
Apr
(Beyond Pesticides, April 10, 2024) Researchers in a 2024 Chemosphere study find synergistic relationships in certain chemical mixtures, particularly heptachlor and triallate and trifluralin and lindane at lower concentrations, respectively. “Investigators should consider additional binary data for acute toxicity and potential chronic health impacts on these mixture…which showed synergism at low levels,†the researchers conclude. “According to a Centers for Disease Control (CDC) assessment, more than 50 pesticides are detected in blood or urine samples from the US population,†Researchers point to a cause for concern. The findings come as no surprise to advocates who have urged an assessment of the potential synergistic impacts of pesticide mixtures in the regulation of pesticides. Researchers “used the exposure data from a complex operating site with legacy pesticide pollution to evaluate if Inhalation of pesticide mixtures released from such contaminated sites could pose a risk to human health, The component-based risk assessment approaches that rely on additivity can predict the actual risk of pesticides in a mixture, and The legacy organochlorine pesticides banned many years ago interact with registered and supposedly safe herbicides in a mixture.†The study site is “a pesticide packaging and handling facility†contaminated with the following pesticides (“historical and […]
Posted in 2,4-D, Chemical Mixtures, contamination, Heptachlor, Lindane, Trifluralin, Uncategorized | No Comments »
12
Mar
(Beyond Pesticides, March 12, 2024) A study released in Science of the Total Environment unpacks the threat of emerging chemicals of concern (CECs), including toxic pesticides, in the groundwater of Tunisia. Researchers highlight that the impact of pesticide drift and leaching into groundwater reserves is not siloed to the Middle East and North Africa (MENA) region, but a key concern for most industrialized countries, including the United States. Authors of this study build on literature of CECs already conducted in the region that have broader implications for the spillover effects of pesticide regulation in broader contexts. This descriptive study and accompanying Environmental Risk Assessment (ERA) demonstrate the urgency of Beyond Pesticides’ mission to ban toxic petrochemical pesticides by 2032 because of the pervasiveness of toxic residues, be it pesticides, antibiotics, or other substances, from groundwater systems to human bodies. The researchers performed the tests in thirteen wells in the Grombalia shallow aquifer, an area of northeast Tunisia that feeds into the Wadi El Bay watershed, which is defined as a “high population density [with] intensive agricultural activity [in ‘one of the most polluted areas in Tunisia’].†The researchers gathered data “during two seasons and were analyzed with two high resolution […]
Posted in Atrazine, Bendiocarb, Carbaryl, Chemical Mixtures, Chemicals, contamination, DEET, Groundwater, Uncategorized, Water | 1 Comment »
09
Jan
(Beyond Pesticides, January 9, 2024) A “landscape-level†study finds that typical risk assessment studies used by the U.S. Environmental Protection Agency (EPA) and European regulators fail to “safeguard bees and other pollinators that support agricultural production and wild plant pollination.â€Â The study, published in Nature (November 2023), evaluates the health of bumble bees (Bombus terrestris) as a sentinel species placed in 106 agricultural landscapes across Europe. The authors’ conclusions challenge “the current assumption of pesticide regulation—that chemicals that individually pass laboratory tests and semifield trials are considered environmentally benignâ€â€”calling into question EPA’s persistent failure to adequately regulate mixtures of chemicals to which organisms are exposed in the real world. This study adds to the body of science on pesticide mixtures adversely affecting bee and pollinator health. See here, here, and here. The failure to capture real-world exposure to pesticide mixtures in its regulatory assessments extends to EPA’s systemic failure to evaluate a range of serious adverse impacts, as noted by the agency’s Office of Inspector General (OIG) report. And, aquatic environments also have documented mixtures of pesticides, with the U.S. Geological Survey finding 90 percent of water samples containing at least five or more different pesticides. “We can take no comfort […]
Posted in Agriculture, Chemical Mixtures, Environmental Protection Agency (EPA), International, Pollinators, Uncategorized, Wildlife/Endangered Sp. | No Comments »
