Pesticide Water Quality Criteria Development

The Central Coast Water Board contracted with the University of California Davis (UC Davis) to derive water quality criteria for neonicotinoid insecticides. Draft criteria derivation reports for clothianidin and thiamethoxam and a final report for imidacloprid are available on this website, see below.

Under previous contracts with the Central Valley Water Board, UC Davis developed a methodology to derive water quality criteria for pesticides and used this methodology to derive water quality criteria for 14 other pesticides. Links to those pesticide criteria derivation reports and the methodology used to derive them are available at the Central Valley Water Board website.

UC Davis Clothianidin and Thiamethoxam Water Quality Criteria

The draft UC Davis criteria reports for clothianidin and thiamethoxam were submitted for scientific peer review in October 2020 and are posted here for public review and comment. Note – responses to public comments will be limited to those focused on the technical aspects of the criteria derivation described in the UC Davis draft technical reports. Comments related to policy and/or implementation are outside the scope of these reports.

UC Davis Imidacloprid Water Quality Criteria

Scientific Peer Reviews

Public Comments

Please direct questions about the pesticide water quality criteria to Peter Meertens, Environmental Scientist, at (805)549-3869 or Peter.Meertens@waterboards.ca.gov.

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