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EWG's Tap Water Database — 2019 UPDATE

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2,4-D

Salt Lake City Water System

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.

 

102

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND120ND
2013ND110ND
2014ND150ND
2015ND190ND
2016ND250ND
2017ND200ND

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
2012-06-01ND
2012-07-17ND
2012-07-17ND
2012-07-20ND
2012-07-20ND
2012-07-31ND
2012-07-31ND
2012-07-31ND
2012-08-29ND
2012-08-29ND
2012-08-29ND
2012-09-21ND
2013-01-25ND
2013-01-25ND
2013-04-15ND
2013-04-15ND
2013-04-23ND
2013-05-10ND
2013-05-15ND
2013-05-15ND
2013-06-28ND
2013-06-28ND
2013-07-30ND
2014-01-10ND
2014-01-31ND
2014-01-31ND
2014-05-23ND
2014-05-30ND
2014-05-30ND
2014-06-03ND
2014-06-06ND
2014-06-11ND
2014-06-25ND
2014-06-25ND
2014-07-09ND
2014-07-09ND
2014-07-09ND
2014-07-11ND
2015-01-23ND
2015-01-30ND
2015-01-30ND
2015-02-27ND
2015-05-01ND
2015-05-08ND
2015-05-15ND
2015-06-19ND
2015-06-19ND
2015-06-19ND
2015-06-19ND
2015-06-30ND
2015-06-30ND
2015-06-30ND
2015-06-30ND
2015-06-30ND
2015-07-10ND
2015-07-10ND
2015-07-10ND
2016-01-08ND
2016-01-08ND
2016-01-15ND
2016-02-12ND
2016-02-26ND
2016-03-25ND
2016-05-19ND
2016-05-19ND
2016-06-03ND
2016-06-03ND
2016-06-10ND
2016-06-10ND
2016-06-10ND
2016-06-24ND
2016-06-24ND
2016-06-24ND
2016-06-28ND
2016-06-28ND
2016-07-01ND
2016-07-08ND
2016-07-08ND
2016-07-13ND
2016-07-29ND
2016-07-29ND
2016-07-29ND
2017-01-13ND
2017-01-16ND
2017-03-06ND
2017-03-24ND
2017-06-09ND
2017-06-12ND
2017-06-16ND
2017-06-19ND
2017-06-19ND
2017-06-21ND
2017-06-23ND
2017-06-30ND
2017-06-30ND
2017-07-14ND
2017-07-14ND
2017-07-21ND
2017-07-25ND
2017-08-08ND
2017-08-22ND
2017-08-23ND