Re-evaluation of groundwater monitoring data for glyphosate and bentazone by taking detection limits into account

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningfagfællebedømt

Claus Toni Hansen, Christian Ritz, Daniel Gerhard, Jens Erik Jensen, Jens Carl Streibig

Current regulatory assessment of pesticide contamination of Danish groundwater is exclusively based on samples with pesticide concentrations above detection limit. Here we demonstrate that a realistic quantification of pesticide contamination requires the inclusion of "non-detect" samples i.e. samples with concentrations below the detection limit, as left-censored observations. The median calculated pesticide concentrations are shown to be reduced 10(4) to 10(5) fold for two representative herbicides (glyphosate and bentazone) relative to the median concentrations based upon observations above detection limits alone.

OriginalsprogEngelsk
TidsskriftScience of the Total Environment
Vol/bind536
Sider (fra-til)68-71
Antal sider4
ISSN0048-9697
DOI
StatusUdgivet - 2015

Bibliografisk note

CURIS 2015 NEXS 254

ID: 142020676