Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

2,4-D

Jonesboro 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.

 

31

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND80ND
2015ND50ND
2016N/A00N/A
2017ND80ND
2018ND100ND
2019N/A00N/A

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
2014-01-2814030000502ND
2014-01-2814030000602ND
2014-01-2814030000402ND
2014-01-2814030001808ND
2014-04-1514107000202ND
2014-04-1514107000302ND
2014-04-1514107000102ND
2014-06-1014163003202ND
2015-04-2115113013702ND
2015-04-2115113013902ND
2015-04-2115113014002ND
2015-04-2115113013802ND
2015-04-2115113014102ND
2017-01-3017032000702ND
2017-01-3017032000402ND
2017-01-3017032000502ND
2017-02-0717040002002ND
2017-05-0317124005102ND
2017-05-0317124005202ND
2017-05-0317124005402ND
2017-05-0317124005302ND
2018-01-1118012001602ND
2018-01-1118012001402ND
2018-01-1118012001702ND
2018-01-1118012001802ND
2018-01-1118012001502ND
2018-04-1018101009702ND
2018-04-1018101009602ND
2018-04-1018101009802ND
2018-04-1018101010002ND
2018-04-1018101009902ND