Eight Circuit Vacates Chlorpyrifos Ban

EPA’s ban on the pesticide chlorpyrifos was arbitrary and capricious because the Agency failed to adequately consider other options, the Eighth Circuit Court of Appeals ruled on November 2, 2023, in the case Red River Valley Sugarbeet Growers Ass’n v. Regan.

EPA’s 2021 revocation of all chlorpyrifos tolerances was the result of a Ninth Circuit decision ordering EPA to either modify chlorpyrifos tolerances to ensure they are safe for children or revoke them entirely.  EPA had previously determined that 11 “high-benefit” uses were likely to be safe if other uses were revoked.  But with only 60 days to make a decision and under a court directive not to “engage in additional fact-finding,” EPA opted to revoke all tolerances, effectively banning use of chlorpyrifos on all food and animal feed.

The Eighth Circuit characterized EPA’s decision to revoke all tolerances, despite evidence that some uses could be considered safe, as “g[iving] up” in the face of a “tight deadline.”  “EPA should not have reflexively rejected an approach it had the power to adopt, even if it would have required more work,” the court said.

Under the Federal Food, Drug, and Cosmetic Act, EPA can only leave in place tolerances that the Agency has determined to be safe after consideration of aggregate exposure, “including all anticipated dietary exposures.”  In a 2022 order denying objections to the 2021 revocation, EPA argued that it would not be reasonable to consider exposures solely from the 11 high-benefit uses as “anticipated” because EPA did not have reason to believe they would reflect real-world exposures.  EPA is required to determine whether tolerances are safe, not whether they will be safe “at some unspecified future time,” the Agency said.

The court rejected this interpretation of the statute, which was central to EPA’s decision not to implement a partial ban.  The Agency has an “obligation to ‘anticipate[]’ the effects of its own actions,” Chief Judge Lavenski Smith wrote for the three-judge panel.  If EPA proposed to “keep a set of high-benefit uses in place,” it could certainly “anticipate what would happen under its own proposal.”

The court vacated both the 2021 revocation and the 2022 denial order, remanding to EPA.  The Agency will have 45 days from the date of the ruling to petition for rehearing or rehearing en banc.

More information on the legal battles over chlorpyrifos tolerances can be found in a previous Verdant Law blog post.