Know Your Environment. Protect Your Health.

2,4-D

Clark Public Utilities

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.

 

28

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND60ND
2019ND120ND
2020N/A00N/A
2021ND10ND
2022ND80ND
2023ND10ND

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
2018-08-01ND
2018-08-01ND
2018-08-01ND
2018-08-28ND
2018-08-28ND
2018-08-28ND
2019-04-02ND
2019-04-03ND
2019-05-20ND
2019-05-20ND
2019-05-21ND
2019-06-13ND
2019-07-22ND
2019-07-22ND
2019-07-23ND
2019-08-28ND
2019-08-28ND
2019-12-10ND
2021-08-024171851ND
2022-03-314266381ND
2022-07-284328450ND
2022-07-284328454ND
2022-08-034328447ND
2022-08-034328449ND
2022-08-044328455ND
2022-08-044328458ND
2022-08-044328460ND
2023-09-194531527ND