Greetings,
On March 29, 2017 the Environmental Protection Agency announced its decision to retain all tolerances for chlorpyrifos. A communication from the registrant, Dow AgroSciences, noted that EPA “…will focus its attention on updating and revising its human health assessment for chlorpyrifos under the standard procedures of the Registration Review process scheduled for completion on October 1, 2022.”
Until next time, best wishes.