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EWG's Tap Water Database — 2019 UPDATE

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2,4,5-TP (Silvex)

Hilo

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.

 

18

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
2014ND80ND
2015N/A00N/A
2016N/A00N/A
2017ND100ND

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
2014-01-22C14-01-0087AND
2014-01-22C14-01-0088AND
2014-01-22C14-01-0089AND
2014-01-22C14-01-0090AND
2014-04-01C14-04-0078AND
2014-04-01C14-04-0077AND
2014-04-01C14-04-0076AND
2014-04-01C14-04-0075AND
2017-03-14ND
2017-03-14ND
2017-03-14ND
2017-03-14ND
2017-05-09ND
2017-06-05ND
2017-06-05ND
2017-06-05ND
2017-06-05ND
2017-08-16ND