Know Your Environment. Protect Your Health.

2,4-D

Appleby Water Supply Corporation

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.

 

22

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019N/A00N/A
2020ND50ND
2021ND30ND
2022ND40ND
2023ND80ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2018-01-30Q1803539008ND
2018-04-18Q1815998031ND
2020-05-06Q2017875037ND
2020-05-06Q2017875038ND
2020-05-06Q2017875039ND
2020-05-06Q2017875040ND
2020-05-06Q2017875041ND
2021-02-01Q2102897024ND
2021-07-26Q2119473007ND
2021-10-12Q2128274007ND
2022-02-01Q2203639014ND
2022-05-16Q2214437009ND
2022-09-06Q2226362006ND
2022-11-08Q2233715007ND
2023-03-07Q2308836006ND
2023-03-22Q2310842014ND
2023-03-22Q2310842015ND
2023-06-19Q2323052002ND
2023-08-14Q2333697009ND
2023-08-14Q2333697010ND
2023-10-23Q2345174007ND
2023-10-23Q2345174013ND