Our members received good news in early July when EPA proposed an increase in the atrazine aquatic level of concern (CE-LOC) from the ultra-low 3.4 parts per billion (ppb) level to a new level of 9.7 ppb. This announcement came on the heels of a Scientific Advisory Panel (SAP) for atrazine held last August.


Now for the bad news. While the CE-LOC moved from 3.4 ppb to 9.7 ppb - nearly three times higher - the mitigation maps of impacted areas only minimally changed. EPA’s flawed mitigation maps and modeling would negate the positive impacts of the higher CE-LOC. Unfortunately, EPA continues to ignore 20 years of actual water monitoring data from states, and from its own programs. 


IFCA and other ag groups across the nation asked EPA to review two studies not included in the SAP. The worst of the two studies is extremely low quality and continues to significantly impact the atrazine CE-LOC. Because of the continued use of that flawed study, the CE-LOC remains under 10 parts per billion. 


It is a positive step that EPA appears to be open to taking our concerns into consideration before they release their final proposal. We look forward to continuing our dialogue with the agency to address these issues.”


EPA officials said they will open a comment period following the final atrazine proposal later this year.