Exposure Assessment of Pesticides in Surface Waters of Ontario, Canada Reveals Low Probability of Exceeding Acute Regulatory Thresholds

IF 2.7 4区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES Bulletin of Environmental Contamination and Toxicology Pub Date : 2024-04-02 DOI:10.1007/s00128-024-03879-w

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Abstract

The objectives of this study were to: (1) characterize the exposure of aquatic ecosystems in Southern Ontario, Canada to pesticides between 2002 and 2016 by constructing environmental exposure distributions (EEDs), including censored data; and (2) predict the probability of exceeding acute regulatory guidelines. Surface water samples were collected over a 15-year period by Environment and Climate Change Canada. The dataset contained 167 compounds, sampled across 114 sites, with a total of 2,213 samples. There were 67,920 total observations of which 55,058 were non-detects (81%), and 12,862 detects (19%). The most commonly detected compound was atrazine, with a maximum concentration of 18,600 ngL^− 1 and ~ 4% chance of exceeding an acute guideline (1,000 ngL^− 1) in rivers and streams. Using Southern Ontario as a case study, this study provides insight into the risk that pesticides pose to aquatic ecosystems and the utility of EEDs that include censored data for the purpose of risk assessment.

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加拿大安大略省地表水中杀虫剂暴露评估显示，超过急性监管阈值的概率很低

摘要本研究的目标是(1）通过构建环境暴露分布（EED）（包括删减数据），描述 2002 年至 2016 年间加拿大安大略省南部水生生态系统暴露于农药的情况；以及（2）预测超过急性监管准则的概率。加拿大环境与气候变化部在 15 年间收集了地表水样本。数据集包含 167 种化合物，在 114 个地点采样，共计 2,213 个样本。总观测次数为 67,920 次，其中 55,058 次未检出（81%），12,862 次检出（19%）。最常检测到的化合物是阿特拉津，其最大浓度为 18,600 纳克/升-1，在河流和溪流中超过急性指导值（1,000 纳克/升-1）的几率约为 4%。本研究以安大略省南部为案例，深入探讨了农药对水生生态系统造成的风险，以及 EEDs（包括用于风险评估的删减数据）的实用性。

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来源期刊

Bulletin of Environmental Contamination and Toxicology 环境科学-毒理学

CiteScore

5.60

自引率

3.70%

发文量

230

审稿时长

1.7 months

期刊介绍： The Bulletin of Environmental Contamination and Toxicology(BECT) is a peer-reviewed journal that offers rapid review and publication. Accepted submissions will be presented as clear, concise reports of current research for a readership concerned with environmental contamination and toxicology. Scientific quality and clarity are paramount.