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After a thorough review of the best available science and carefully considering scientific peer review and public comments, EPA has released the final version of three new methodologies to improve drinking water assessments for conventional pesticides. Collectively, these new methods use advanced modeling approaches to incorporate the best available surface water modeling, spatial and historical data on pesticide use. These methods are designed to improve the accuracy, consistency and transparency of pesticide drinking water modeling.
Specifically, the new methods:
Approaches for the Quantitative Use of Surface Water Monitoring Data in Drinking Water Assessments were presented to the Federal Insecticide Fungicide and Rodenticide Act Scientific Advisory Panel in Fall 2019 and the other two methods underwent contract peer review and public comment this past winter. EPA plans to incorporate these new methods into future drinking water assessments when appropriate.
In addition to finalizing these methods to improve drinking water assessments, EPA is also releasing a Framework for Conducting Pesticide Drinking Water Assessments for Surface Water, which describes EPA’s robust, tiered process designed to efficiently screen out pesticides that do not pose a potential risk to human health from those requiring more highly refined analyses to better understand potential risks.
Read about the new methodologies on US EPA webpage.
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