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EWG's Tap Water Database — 2021 UPDATE

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2,4-D

Citizens Water - Indianapolis

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.

 

76

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND10ND
20150.0273 ppb221ND - 0.600 ppb
20160.138 ppb137ND - 0.500 ppb
2017ND40ND
2018ND220ND
20190.145 ppb141ND - 2.03 ppb

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
2014-08-133082571RS28-1403ND
2015-05-133241842RS28-1502ND
2015-05-133241852RS28-1502ND
2015-05-133241832RS28-1502ND
2015-05-133241822RS28-1502ND
2015-05-133241809RS28-15020.600 ppb
2015-05-133241799RS28-1502ND
2015-05-133241759RS28-1502ND
2015-05-203246211RS28-1502ND
2015-06-263271619RS28-1502ND
2015-08-113298598RS28-1503ND
2015-08-123298618RS28-1503ND
2015-08-123298645RS28-1503ND
2015-08-123298586RS28-1503ND
2015-08-123298574RS28-1503ND
2015-08-123298550RS28-1503ND
2015-08-123298538RS28-1503ND
2015-08-123298514RS28-1503ND
2015-08-123298502RS28-1503ND
2015-11-093356413RS525-150ND
2015-11-093356412RS525-150ND
2015-11-093356415RS525-150ND
2015-11-093356414RS525-150ND
2016-05-103446461RS28-1602ND
2016-05-113446450RS28-1602ND
2016-05-113446439RS28-16020.500 ppb
2016-05-113446428RS28-1602ND
2016-05-113446417RS28-1602ND
2016-05-113446406RS28-16020.400 ppb
2016-05-113446395RS28-16020.300 ppb
2016-06-083468294RS28-1602ND
2016-06-203475737RS28-1602ND
2016-11-073581175RS-16040.200 ppb
2016-11-073581174RS-16040.200 ppb
2016-11-073581173RS-16040.1000 ppb
2016-11-073581176RS-16040.1000 ppb
2017-11-15P1117494ND
2017-11-15P1117495ND
2017-11-15P1117496ND
2017-11-15P1117497ND
2018-05-16P0518466RS28-180ND
2018-05-16P0518465RS28-180ND
2018-05-16P0518464RS28-180ND
2018-05-16P0518463RS28-180ND
2018-05-16P0518462RS28-180ND
2018-05-16P0518461RS28-180ND
2018-05-16P0518460RS28-180ND
2018-05-16P0518459RS28-180ND
2018-06-132018062200RS28-1ND
2018-08-14P0818554ND
2018-08-15P0818552ND
2018-08-15P0818551ND
2018-08-15P0818553ND
2018-08-15P0818550ND
2018-08-15P0818549ND
2018-08-15P0818548ND
2018-08-15P0818547ND
2018-08-15P0818546ND
2018-11-12P1118195ND
2018-11-12P1118196ND
2018-11-12P1118194ND
2018-11-12P1118193ND
2019-05-15P0519-3482.03 ppb
2019-05-15P0519-338ND
2019-05-15P0519-333ND
2019-05-15P0519-368ND
2019-05-15P0519-363ND
2019-05-15P0519-358ND
2019-05-15P0519-353ND
2019-05-15P0519-343ND
2019-08-14P0819434RS28-190ND
2019-10-02P1019052053ND
2019-10-022019100965RS525-ND
2019-11-11P1119199ND
2019-11-11P1119198ND
2019-11-11P1119197ND