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EWG's Tap Water Database — 2021 UPDATE

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2,4,5-TP (Silvex)

Bi County WSC 1

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
2014ND110ND
2015N/A00N/A
2016N/A00N/A
2017ND110ND
2018N/A00N/A
2019ND30ND

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
2014-01-23Q1402181010ND
2014-01-23Q1402181009ND
2014-01-23Q1402181008ND
2014-01-23Q1402181007ND
2014-01-23Q1402181006ND
2014-01-23Q1402181005ND
2014-01-23Q1402181004ND
2014-01-23Q1402181003ND
2014-01-23Q1402181002ND
2014-01-23Q1402181001ND
2014-01-23Q1402181057ND
2017-01-05Q1700559011ND
2017-01-05Q1700559033ND
2017-01-05Q1700559032ND
2017-01-05Q1700559010ND
2017-03-29Q1713282023ND
2017-03-29Q1713282022ND
2017-03-29Q1713282021ND
2017-03-29Q1713282020ND
2017-03-29Q1713282019ND
2017-10-02Q1748547014ND
2017-10-02Q1748547010ND
2019-06-11Q1934121010ND
2019-08-07Q1951925010ND
2019-10-14Q1972404011ND