Know Your Environment. Protect Your Health.

2,4-D

Mansfield 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.

 

16

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND40ND
20200.150 ppb21ND - 0.300 ppb
2021ND20ND
20220.120 ppb21ND - 0.240 ppb
2023ND20ND

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
2018-04-1935387645001ND
2018-04-1935387645001ND
2018-08-0635409597001ND
2018-08-0635409597001ND
2019-03-1335454725001ND
2019-03-1335454725001ND
2019-08-0135486698001ND
2019-08-0135486698001ND
2020-02-0335528231001ND
2020-09-22355796800010.300 ppb
2021-03-0335616824004ND
2021-08-1735657244001ND
2022-02-2235699238003ND
2022-08-22357421550020.240 ppb
2023-02-0735778295005ND
2023-08-2135823285001ND