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EWG's Tap Water Database — 2019 UPDATE

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2,4-D

Lee County WSC

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.

 

17

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013ND20ND
2014ND50ND
2015N/A00N/A
2016ND10ND
2017ND90ND

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 Lab ID Result
2013-10-14Q1308854026ND
2013-10-14Q1308854014ND
2014-02-25AC44557ND
2014-02-25AC44560ND
2014-02-25AC44559ND
2014-02-25AC44556ND
2014-02-25AC44558ND
2016-04-12AD32874ND
2017-01-30AD67644ND
2017-01-30AD67640ND
2017-05-04AD82851ND
2017-05-04AD82852ND
2017-05-04AD82840ND
2017-05-04AD82853ND
2017-05-30AD85966ND
2017-07-24AD90405ND
2017-10-04AD99355ND