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EWG's Tap Water Database — 2021 UPDATE

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2,4-D

East Jefferson Waterworks District 1

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.

 

60

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND60ND
2015ND120ND
2016ND120ND
2017ND60ND
2018ND120ND
2019ND120ND

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
2014-01-06AD88200ND
2014-01-06AD88198ND
2014-01-06AD88200ND
2014-01-06AD88199ND
2014-01-06AD88198ND
2014-01-06AD88199ND
2015-02-2335177313003ND
2015-02-2335177313004ND
2015-02-2335177313005ND
2015-02-2335177313005ND
2015-02-2335177313004ND
2015-02-2335177313003ND
2015-09-3035209766005ND
2015-09-3035209766004ND
2015-09-3035209766003ND
2015-09-3035209766005ND
2015-09-3035209766004ND
2015-09-3035209766003ND
2016-01-2035226299003ND
2016-01-2035226299004ND
2016-01-2035226299005ND
2016-01-2035226299005ND
2016-01-2035226299004ND
2016-01-2035226299003ND
2016-12-0735282147001ND
2016-12-0735282147002ND
2016-12-0735282147003ND
2016-12-0735282147002ND
2016-12-0735282147001ND
2016-12-0735282147003ND
2017-02-0935294515005ND
2017-02-0935294515004ND
2017-02-0935294515003ND
2017-02-0935294515003ND
2017-02-0935294515005ND
2017-02-0935294515004ND
2018-03-1535380393001ND
2018-03-1535380393002ND
2018-03-1535380393003ND
2018-03-1535380393001ND
2018-03-1535380393002ND
2018-03-1535380393003ND
2018-08-1535411635001ND
2018-08-1535411635003ND
2018-08-1535411635002ND
2018-08-1535411635001ND
2018-08-1535411635003ND
2018-08-1535411635002ND
2019-02-2735451094001ND
2019-02-2735451093001ND
2019-02-2735451088001ND
2019-02-2735451088001ND
2019-02-2735451093001ND
2019-02-2735451094001ND
2019-08-0135486654001ND
2019-08-0135486659001ND
2019-08-0135486656001ND
2019-08-0135486654001ND
2019-08-0135486659001ND
2019-08-0135486656001ND