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EWG's Tap Water Database — 2021 UPDATE

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2,4,5-TP (Silvex)

Hempstead

2(2,4,5-trichlorophenoxy) propionic acid (2,4,5-TP or Silvex) is a cancer-causing herbicide banned in the U.S. in 1985 because of its toxicity. It is still detected as a groundwater contaminant in areas where it was sprayed or stored.

MORE ABOUT THIS CONTAMINANT

 

32

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND90ND
2015ND80ND
2016ND50ND
2017ND20ND
2018ND80ND
2019N/A00N/A

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 3 ppb

The EWG Health Guideline of 3 ppb for 2,4,5-TP 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) 50 ppb

ppb = parts per billion

All test results

Date Lab ID Result
2014-02-071402307-001-SOCSND
2014-03-181403C79-001-SOCSND
2014-03-181403C79-004-SOCSND
2014-03-181403C79-002-SOCSND
2014-03-181403C79-003-SOCSND
2014-03-261403I18-002-SOCSND
2014-03-2603I18-001-SOCSND
2014-05-131405924-001-SOCSND
2014-05-131405924-002-SOCSND
2015-03-171503B84-003-SOCSND
2015-03-171503B84-001-SOCSND
2015-03-171503B84-002-SOCSND
2015-03-241503G73-001-SOCSND
2015-05-271505J25-004-SOCSND
2015-05-271505J25-001-SOCSND
2015-05-271505J25-003-SOCSND
2015-05-271505J25-002-SOCSND
2016-03-231603I98-002-SOCSND
2016-03-231603I98-003-SOCSND
2016-03-231603I98-001-SOCSND
2016-03-291603N30-002-SOCSND
2016-03-291603N30-001-SOCSND
2017-05-237019310001ND
2017-05-237019310002ND
2018-11-077070357001ND
2018-11-077070357002ND
2018-11-147071096001ND
2018-11-147071096002ND
2018-11-217071825001ND
2018-11-217071825002ND
2018-12-117073530001ND
2018-12-117073530002ND