@techreport{stackpoole_multidecadal_2025,
	title = {Multidecadal change in pesticide concentrations relative to human health benchmarks in the {Nation}’s groundwater},
	url = {https://pubs.usgs.gov/publication/sir20255081},
	abstract = {Groundwater-quality trend assessments identify aquifers that are responding to changes in pesticide use and the compounds that may pose a threat to water availability. The U.S. Geological Survey has been monitoring pesticide concentrations in groundwater for 25 principal aquifers across the conterminous United States since 1993. The groundwater well locations represent a range of soils, climate, and landforms. The wells are used to monitor groundwater underlying selected agricultural and urban settings and groundwater used for domestic supply. This study examined changes in relative concentrations, defined here as the percentage of wells with pesticide concentrations exceeding a human health benchmark (HHB). HHBs used in this report are legally enforceable drinking-water standards and nonenforceable drinking water levels. Relative pesticide concentration increases may lead to decreased water availability, as restrictions may be put in place for groundwater used as a drinking-water source.This study focused on concentration changes in 22 pesticides that were included...},
	language = {en},
	number = {2025-5081},
	urldate = {2026-01-21},
	institution = {U.S. Geological Survey},
	author = {Stackpoole, Sarah M. and Lindsey, Bruce D. and Nell, Cee S.},
	year = {2025},
	doi = {10.3133/sir20255081},
	note = {ISSN: 2328-0328
Publication Title: Scientific Investigations Report},
	keywords = {Terrestrial Ecoregions},
}

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