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Neonic Pesticide May Become More Toxic in Tap Water

Yet again, our government scientists—the oft neglected but so important brain trust of our Nation—bring the public some very important new data. Pesticide water monitoring experts at the U.

The study report authors note that although the chlorinated disinfection byproducts derived from neonics have an unknown toxicity profile, it is possible that they may be more toxic than the parent compound. Thus, the authors recommend in the article that the “greater potential toxicity and frequent presence in these water samples of neonicotinoid metabolites demonstrates the need to consider their fate and persistence in drinking water treatment systems (ex. during chlorination and other treatment processes) and their potential effects on human health” (p. 7). NRDC agrees! That’s why we are asking EPA to include all the neonic metabolites and chlorinated products in its human health risk assessment of the neonic pesticides, due later this year.

In addition to surface water and drinking water contamination, the U.S. Department of Agriculture has found neonics inside fruits and vegetables, where they can’t be simply be washed off due to their systemic nature. And, emerging science suggests a link with neonic exposure and potential disorders including neurobehavioral impairments in animal studies, and Autism-like effects in prenatally exposed children (see my blog for details).

In addition to including all relevant neonic metabolites in its risk assessment, EPA should also assess the cumulative risks from all the neonic pesticides and their toxic metabolites together. It is alarming that EPA seems to have no plan for conducting a cumulative risk assessment for this toxic and persistent class of pesticides.

The scientific evidence of harm is piling up—EPA must pay attention!