Study: Pesticides in Tap Water

For the first time, researchers have detected traces of neonicotinoids, a common class of pesticides, in tap water.

A study in 2015 from the US Geological Survey (USGS) found that neonics were widespread in water samples collected from 48 different rivers and streams in the US. This new study from the USGS and the University of Iowa, looked at tap water that was treated.

“Occurrence of Neonicotinoid Insecticides in Finished Drinking Water Detected”


Publication Date (Web): April 5, 2017
Copyright © 2017 American Chemical Society

Neonicotinoid insecticides are widespread in surface waters across the agriculturally intensive Midwestern United States.

We report for the first time the presence of three neonicotinoids in finished drinking water and demonstrate their general persistence during conventional water treatment.

“These are very low levels, these are nanograms per litre which means parts per trillion, a very low concentration,” said Prof Gregory LeFevre, one of the authors from the University of Iowa. “But at the same time there are concerns about what those low levels might do from an exposure standpoint.”

In the US, the Environmental Protection Agency regulates contaminants in water but as of now, neonics are not considered a threat.

Periodic tap water grab samples were collected at the University of Iowa over 7 weeks in 2016 (May–July) and became the target of sampling.

“Without really good toxicity data it is hard to ascertain the scale of this, but whenever we have pesticides in the drinking water that is something that raises a flag no matter what type of concentration it is,” said Prof LeFevre.

The study has been published in the journal Environmental Science & Technology Letters.

A bit heavy for us to follow completely but we see the facts, pesticides were found in tap water.

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