Know Your Environment. Protect Your Health.

2,4-D

St Charles Water District 1 East Bank

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.

 

29

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND80ND
2020ND40ND
2021ND40ND
2022ND50ND
2023ND40ND

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
2018-01-2335370117001ND
2018-01-2335370117001ND
2018-07-1735405500001ND
2018-07-1735405500001ND
2019-01-2235444037001ND
2019-01-2235444038001ND
2019-01-2235444037001ND
2019-01-2235444038001ND
2019-07-2535485229002ND
2019-07-2535485229001ND
2019-07-2535485229002ND
2019-07-2535485229001ND
2020-03-0535535509001ND
2020-03-0535535509002ND
2020-11-1035591297001ND
2020-11-1035591292001ND
2021-01-2835608065001ND
2021-01-2835608065002ND
2021-10-2535673766001ND
2021-10-2535673766002ND
2022-02-0235694868001ND
2022-02-0235694870001ND
2022-08-2435742576001ND
2022-08-2435742579001ND
2022-08-2435742769001ND
2023-03-2035787602001ND
2023-03-2035787604001ND
2023-11-2835844322001ND
2023-11-2835844330001ND