Know Your Environment. Protect Your Health.

2,4-D

Metropolitan District Commission

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.

 

43

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND110ND
2019ND40ND
2020ND70ND
2021ND70ND
2022ND70ND
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
2018-06-27CA79476ND
2018-06-27CA79475ND
2018-06-27CA79477ND
2018-07-18SOCR 200500124ND
2018-07-18SOCR 200500122ND
2018-07-18SOCR 200500126ND
2018-07-18SOCR 200500125ND
2018-09-25CB38504ND
2018-09-25CB38505RND
2018-09-25CB38869ND
2018-09-25CB38505ND
2019-07-08SOCR 200539198ND
2019-07-08SOCR 200539200ND
2019-07-08SOCR 200539199ND
2019-07-08SOCR 200539197ND
2020-12-08SOC 200600638ND
2020-12-08SOC 200600609ND
2020-12-08SOCR 200600618ND
2020-12-08SOCR 200600626ND
2020-12-08SOCR 200600627ND
2020-12-08SOCR 200600628ND
2020-12-09SOC 200600592ND
2021-11-23S300107593 300107595ND
2021-11-23H300107603 300107604ND
2021-11-23S300107511 300107512ND
2021-11-29S300109627 300109628ND
2021-11-29H300109590 300109592ND
2021-11-30H300109617 300109620ND
2021-11-30H300109618 300109622ND
2022-12-08H300283837 300283839ND
2022-12-08300283822 300283832CND
2022-12-15S300287062 300287064ND
2022-12-15H300287081 300287083ND
2022-12-15H300287109 300287117ND
2022-12-15S300287090 300287092ND
2022-12-15S300287039 300287043ND
2023-12-05S300456329 300456331ND
2023-12-05H300456519 300456521ND
2023-12-05H300456542 300456544ND
2023-12-05H300456513 300456515ND
2023-12-06S300456308 300456310ND
2023-12-06S300456298 300456300ND
2023-12-06H300456516 300456518ND