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EWG's Tap Water Database — 2021 UPDATE

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2,4,5-TP (Silvex)

West Hempstead WD

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

 

25

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
2014ND50ND
2015ND40ND
2016ND20ND
2017ND20ND
2018ND60ND
2019ND60ND

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
2014-08-281408K48-004-SOCSND
2014-08-281408K48-005-SOCSND
2014-08-281408K48-003-SOCSND
2014-08-281408K48-002-SOCSND
2014-08-281408K48-001-SOCSND
2015-11-301511K77-002-SOCSND
2015-11-301511K77-001-SOCSND
2015-11-301511K77-003-SOCSND
2015-11-301511K77-004-SOCSND
2016-06-221606M34-002-SOCSND
2016-06-221606M34-001-SOCSND
2017-06-147021376002-SOCSND
2017-06-147021376001-SOCSND
2018-10-297069359006ND
2018-10-297069359003ND
2018-10-297069359002ND
2018-10-297069359001ND
2018-10-297069359004ND
2018-10-297069359005ND
2019-10-0970107922002ND
2019-10-0970107922001ND
2019-10-1070108060002ND
2019-10-1070108060001ND
2019-10-1070108060003ND
2019-10-1070108060004ND