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EWG's Tap Water Database — 2021 UPDATE

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2,4,5-TP (Silvex)

Intracoastal Water System West

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

 

34

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND20ND
2015ND100ND
2016ND40ND
2017ND40ND
2018ND100ND
2019ND40ND

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
2014-03-10AD89567ND
2014-03-10AD89567ND
2015-03-2335181102002ND
2015-03-2335181102002ND
2015-10-1435212298002ND
2015-10-1435212298003ND
2015-10-1435212298001ND
2015-10-1435212298003ND
2015-10-1435212298002ND
2015-10-1435212298001ND
2015-10-1935213246002ND
2015-10-1935213246002ND
2016-02-1535230016002ND
2016-02-1535230016002ND
2016-12-1335283969006ND
2016-12-1335283969006ND
2017-02-2735297619004ND
2017-02-2735297619004ND
2017-10-3035345279001ND
2017-10-3035345279001ND
2018-02-1935375364002ND
2018-02-1935375364002ND
2018-07-0935403785003ND
2018-07-0935403785003ND
2018-07-0935403785002ND
2018-07-0935403785001ND
2018-07-0935403785001ND
2018-07-0935403785002ND
2018-08-2135412901001ND
2018-08-2135412901001ND
2019-01-1635442897001ND
2019-01-1635442897001ND
2019-08-2735493982002ND
2019-08-2735493982002ND