Know Your Environment. Protect Your Health.

2,4-D

City of Rexburg

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.

 

21

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019N/A00N/A
2020ND40ND
2021ND60ND
2022N/A00N/A
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
2018-06-29SB18070177001ND
2018-06-29SB18070188001ND
2018-08-01S1813271ND
2020-06-29SB20070003001ND
2020-07-06SB20070490001ND
2020-11-30SB20120066001ND
2020-11-30SB20120071001ND
2021-01-25SB21011645001ND
2021-01-25SB21011641001ND
2021-03-31SB21040230001ND
2021-04-01SB21040627001ND
2021-04-26SB21041931001ND
2021-04-26SB21041974001ND
2023-06-14SMDF068704ND
2023-06-14SMDF068705ND
2023-06-14SMDF068706ND
2023-06-14SMDF068707ND
2023-09-11SMDI035501ND
2023-09-11SMDI035601ND
2023-09-11SMDI035801ND
2023-09-11SMDI035901ND