Know Your Environment. Protect Your Health.

2,4-D

Connecticut Water Company - Northern Region-Western 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.

 

27

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND40ND
2020ND10ND
2021ND10ND
2022ND160ND
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
2018-01-31BZ82691SOCRND
2018-01-31BZ82950SOC2ND
2018-06-28CA80715SOC2ND
2018-07-26CA99050ND
2019-01-09SOC 200518249ND
2019-01-10SOCR 200518412ND
2019-01-10SOCR 200489130ND
2019-03-11SOC 200524185ND
2020-01-15SOCR 200563111ND
2021-03-05SOCR 200608709ND
2022-01-31CK26558ND
2022-02-01CK27434ND
2022-02-28CK76167ND
2022-04-18CL11075ND
2022-08-26CM16197ND
2022-08-26CM16200ND
2022-09-07CM25593ND
2022-09-08CM25670ND
2022-09-20CM37292ND
2022-09-20CM37296ND
2022-10-04CM49624ND
2022-10-04CM49621ND
2022-10-06CM51510ND
2022-10-06CM51504ND
2022-10-06CM50872ND
2022-11-03CM76536ND
2023-01-18CN25096ND