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EWG's Tap Water Database — 2021 UPDATE

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2,4-D

Town of Payson

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.

MORE ABOUT THIS CONTAMINANT

 

62

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND80ND
2015N/A00N/A
2016ND540ND
2017N/A00N/A
2018N/A00N/A
2019N/A00N/A

ppb = parts per billion

State and national drinking water standards and health guidelines

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
2014-01-06550-17072-5DND
2014-01-06550-17072-5CND
2014-01-06550-17072-5BND
2014-01-06550-17072-5AND
2014-01-08550-17264-5S4ND
2014-01-08550-17264-5S3ND
2014-01-08550-17264-5S2ND
2014-01-08550-17264-5S1ND
2016-02-02201602040010SEND
2016-02-02201602040010SDND
2016-02-02201602040010SCND
2016-02-02201602040010SBND
2016-02-02201602040010SAND
2016-02-08201602080185SCND
2016-02-08201602080185SAND
2016-02-08201602080185SBND
2016-02-08201602080185SDND
2016-02-09201602100015SEND
2016-02-09201602100015SDND
2016-02-09201602100015SCND
2016-02-09201602100015SBND
2016-02-09201602100015SAND
2016-02-16201602180029SEND
2016-02-16201602180029SDND
2016-02-16201602180029SCND
2016-02-16201602180029SBND
2016-02-16201602180029SAND
2016-02-17201602180018SAND
2016-02-17201602180018SDND
2016-02-17201602180018SCND
2016-02-17201602180018SBND
2016-02-22201602240056SDND
2016-02-22201602240056SCND
2016-02-22201602240056SBND
2016-02-22201602240056SAND
2016-07-08201607190102SDND
2016-07-08201607190102SCND
2016-07-08201607190102SBND
2016-07-08201607190102SAND
2016-07-19201607210249SEND
2016-07-19201607210249SDND
2016-07-19201607210249SCND
2016-07-19201607210249SBND
2016-07-19201607210249SAND
2016-07-20201607210259SDND
2016-07-20201607210259SAND
2016-07-20201607210259SBND
2016-07-20201607210259SCND
2016-07-20201607210259SEND
2016-07-25201607260098SDND
2016-07-25201607260098SCND
2016-07-25201607260098SBND
2016-07-25201607260098SAND
2016-07-26201607270055SDND
2016-07-26201607270055SCND
2016-07-26201607270055SBND
2016-07-26201607270055SAND
2016-07-27201607280041SCND
2016-07-27201607280041SBND
2016-07-27201607280041SAND
2016-08-15201608160279SAND
2016-08-15201608160279SBND