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EWG's Tap Water Database — 2019 UPDATE

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2,4-D

Jordan Valley Water Conservancy District

2,4-D (2,4-dichlorophenoxyacetic acid) is a herbicide that can be applied directly to GMO corn and soy plants engineered to withstand this toxic chemical. Americans' exposures to 2,4-D from food and drinking water will likely increase in years to come as farmers plant more of these GMO crops. Read More.

2,4-D is an endocrine disruptor that interferes with thyroid hormones. The International Agency for Research on Cancer classifies 2,4-D as possibly carcinogenic to humans. In occupational studies, farmers exposed to 2,4-D tended to have higher incidences of damaged and malformed sperm. Laboratory animals exposed to 2,4-D during gestation are born underdeveloped and are more likely to have birth defects.

 

32

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND40ND
2014ND50ND
2015ND50ND
2016ND50ND
2017ND110ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 20 ppb

The EWG Health Guideline of 20 ppb for 2,4-D was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against harm to internal organs.

EPA Maximum Contaminant
Level (MCL) 70 ppb

The legal limit for 2,4-D, established in 1991, was based on toxicity studies in laboratory animals conducted in the 1980s. This limit may not fully protect against harm to the nervous system, harm to the thyroid, and hormone disruption.

ppb = parts per billion

All test results

Date Result
2012-07-18ND
2012-12-12ND
2013-06-26ND
2013-08-27ND
2013-10-29ND
2013-10-29ND
2014-01-02ND
2014-06-03ND
2014-06-04ND
2014-06-04ND
2014-07-15ND
2015-01-13ND
2015-02-11ND
2015-02-26ND
2015-07-07ND
2015-07-21ND
2016-01-06ND
2016-02-16ND
2016-04-05ND
2016-04-25ND
2016-07-18ND
2017-01-03ND
2017-01-03ND
2017-01-04ND
2017-01-04ND
2017-01-23ND
2017-05-03ND
2017-06-07ND
2017-06-08ND
2017-07-10ND
2017-07-12ND
2017-08-14ND