Know Your Environment. Protect Your Health.

2,4-D

City of Nampa

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.

 

53

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND120ND
2020ND30ND
2021ND120ND
2022ND180ND
2023ND70ND

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
2018-10-08S1850028ND
2019-08-15S1940600ND
2019-08-15S1940599ND
2019-09-17S1946663ND
2019-09-17S1946664ND
2019-09-17S1946661ND
2019-09-17S1946666ND
2019-09-17S1946665ND
2019-09-18S1947017ND
2019-09-18S1947010ND
2019-09-18S1947008ND
2019-09-18S1947009ND
2019-09-18S1947007ND
2020-02-12S2006566ND
2020-07-14S2033050ND
2020-10-01S2049166ND
2021-02-08S2105827ND
2021-02-08S2105826ND
2021-02-08S2105824ND
2021-02-08S2105828ND
2021-02-08S2105829ND
2021-03-08S2110615ND
2021-03-08S2110611ND
2021-03-08S2110613ND
2021-04-21S2118306ND
2021-04-21S2118309ND
2021-04-21S2118307ND
2021-11-09S2160872ND
2022-06-09S2227610ND
2022-08-18S2240731ND
2022-08-18S2240732ND
2022-08-18S2240733ND
2022-08-18S2240734ND
2022-08-18S2240737ND
2022-08-19S2240997ND
2022-08-19S2240995ND
2022-08-19S2240996ND
2022-08-19S2240998ND
2022-11-16S2256971ND
2022-11-16S2256972ND
2022-11-16S2256973ND
2022-11-16S2256974ND
2022-11-16S2256976ND
2022-11-16S2256977ND
2022-11-16S2256978ND
2022-11-16S2256980ND
2023-02-01S2302073-01ND
2023-05-17S2309616-01ND
2023-05-17S2309616-02ND
2023-05-17S2309616-03ND
2023-08-03S2316312-01ND
2023-08-03S2316312-02ND
2023-11-30S2325655-01ND