EPA responds to Illinois Rep concerning Hayes’ atrazine based frog gonad assertions

Tuesday, June 1, 2010
Illinois State Representative, Dave Winters, who heard Dr. Hayes’ testimony last February regarding frog gonads sent a letter to USEPA asking if it were true that they had reviewed all Dr. Hayes’ data as Dr. Hayes testified. USEPA replied to Representative Winters this week.


The response states:

“. . . I regret that the EPA science staff in the office of Pesticide Program’s EFED (Environmental Fate and Effects Division) could not properly account for the sample sizes and study design reportedly used by the Berkeley researchers. As a result, we were unable to complete any independent analysis to support the study’s conclusions.”

“. . .no reliable determination of cause-effect or concentration-response relationship could be established between atrazine and reported effects in amphibians.”

“EPA presented its review to a FIFRA (Federal Insecticide, Fungicide Rodenticide Act) SAP (Scientific Advisory Panel) and concluded that it was reasonable to reject the hypothesis formulated in 2003 that atrazine exposure can affect gonadal development. The Agency also determined that there was no compelling reason to pursue additional testing with regard to the potential effects of atrazine on amphibian gonadal development.”

View the complete letter- USEPA Response to Rep Winters May 2010.

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