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EWG's Tap Water Database

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2,4-D

Warminster Municipal Authority

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.

 

34

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2010N/A00N/A
2011ND340ND
2012N/A00N/A
2013N/A00N/A
2014N/A00N/A
2015N/A00N/A

ppb = parts per billion.

State and national drinking water standards and health guidelines

Health Guideline 20 ppb

The 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.

ppb = parts per billion.

EPA Maximum Contaminant
Level (MCL) 70 ppb

The enforceable federal standard that defines the highest level of a contaminant allowed in drinking water.

ppb = parts per billion.

EPA Maximum Contaminant
Level Goal (MCLG)70.0 ppb

A non-enforceable federal health guideline. For cancer-causing chemicals, these health goals are typically set to zero.

ppb = parts per billion.

All test results

Date Lab ID Result
2011-02-079888578016ND
2011-02-079888578009ND
2011-02-079888578010ND
2011-02-079888578011ND
2011-02-079888578012ND
2011-02-079888578013ND
2011-02-079888578014ND
2011-02-079888578017ND
2011-02-079888578006ND
2011-02-079888578015ND
2011-02-079888578008ND
2011-02-079888578007ND
2011-02-079888578003ND
2011-02-079888578001ND
2011-02-079888578005ND
2011-02-079888578002ND
2011-02-079888578004ND
2011-04-049898253003ND
2011-04-049898253015ND
2011-04-049898253006ND
2011-04-049898253002ND
2011-04-049898253016ND
2011-04-049898253017ND
2011-04-049898253014ND
2011-04-049898253008ND
2011-04-049898253007ND
2011-04-049898253009ND
2011-04-049898253010ND
2011-04-049898253005ND
2011-04-049898253011ND
2011-04-049898253012ND
2011-04-049898253004ND
2011-04-049898253013ND
2011-04-049898253001ND