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Daily News Blog

Archive for the 'Drinking Water' Category


07
Oct

Water Contamination with Pesticides Goes Unmonitored as Problem Escalates

(Beyond Pesticides, October 7, 2021) The Arizona State Auditor General reports a lack of groundwater monitoring for pesticides and other contaminants by the Arizona Department of Environmental Quality (ADEQ). For over six years, the agency failed to monitor groundwater and soil for agricultural pesticide contamination. Furthermore, the agency did not implement key groundwater monitoring processes over four years, despite law requirements. This lack of waterway monitoring resulted in an increased number of impaired surface waters across the state.   Pesticide contamination in waterways is historically commonplace and widespread throughout U.S. rivers and streams, with at least five or more different pesticides present in 90 percent of water samples. Thousands of tons of pesticides enter waterways (e.g., rivers, streams, lakes, oceans) around the U.S. from agricultural and nonagricultural sources, contaminating essential drinking water sources, such as surface water and groundwater. Reports like these are essential in determining appropriate regulatory action to protect human, animal, and environmental health from chemical toxicant contamination. The report states, “[The] Department has not developed all required aquifer water quality standards, conducted key ongoing groundwater monitoring of the State’s aquifers, monitored for agricultural pesticides in groundwater and surrounding soil, or reduced the number of impaired surface waters in the State, limiting its […]

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11
Mar

Ecosystem Health: Pesticide Use from Forest Management Practices Threatens Essential West Coast Marine Organisms

(Beyond Pesticides, March 11, 2021) A Portland State University (PSU) study finds that pesticides from the forestry industry threaten clams, mussels, oysters (bivalves) along the Oregon state coast. Bivalves are excellent indicator species, signaling environmental contamination through their sedimentary, filter-feeding diet. However, continuous pesticide inputs—from various forestry management regimes—into watersheds along Oregon’s coastal zone endanger these species in downstream rivers and estuaries (river mouths). Although research demonstrates many forestry practices (e.g.., road building, planting, clearcutting, thinning) have cumulative effects on the ecosystem, there is a lack of studies addressing the overall impact of multiple chemical mixtures and application on watersheds and subsequent aquatic transport. Like agriculture, conventional forest management across the U.S. depends on the use of toxic pesticides to control pest populations. However, pesticide residues from application drift, runoff, and contamination continuously jeopardize the health and fitness of various non-target species, including humans. Marine ecosystem pollution is difficult to track and measure, and forestry pesticide regulations can invoke variations in water quality requirements through discrepancies in buffer zones and application concentrations. Therefore, studies like this can help guide future forest management practices to reduce the number of chemicals entering aquatic ecosystems. Researchers in the study note, “These findings highlight the need to […]

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15
Jan

Millions of People Drinking Groundwater with Pesticides or Pesticide Degradates

(Beyond Pesticides, January 15, 2021) A study of groundwater that feeds public drinking water supply finds pesticides in 41% of supply wells (and a handful of freshwater springs). Two-thirds of that 41% contain pesticide compounds per se, and one-third contain pesticide degradates — compounds resulting from biotic (or abiotic) transformation of pesticides into other compounds. There is considerable ink (digital and actual) covering the health and environmental impacts of pesticide exposures, and reporting on the issue of pesticide migration into groundwater and waterways. Beyond Pesticides maintains that organic practices in land management, and especially in agriculture, are the solution to the contamination of our waterways and groundwater. Such practices, widely adopted, would have enormous salutary effects on human health and the health of ecosystems and their inhabitants. Published in Environmental Science & Technology, the study paper reports this research as the “first systematic assessment of raw [untreated] groundwater used for public drinking supply across the United States to include and provide human-health context for a large number of pesticide degradates.” Samples for the research were gathered across 1,204 sites — at or near the wellheads — in 23 principal aquifers whose groundwater is tapped for drinking water supply used by approximately […]

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