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EWG's Tap Water Database — 2021 UPDATE

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2,4,5-TP (Silvex)

West Winn Water System Inc.

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

 

28

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND140ND
2015N/A00N/A
2016N/A00N/A
2017ND140ND
2018N/A00N/A
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
2014-02-03AD88840ND
2014-02-03AD88838ND
2014-02-03AD88837ND
2014-02-03AD88839ND
2014-02-03AD88840ND
2014-02-03AD88841ND
2014-02-03AD88839ND
2014-02-03AD88838ND
2014-02-03AD88837ND
2014-02-03AD88841ND
2014-02-24AD89382ND
2014-02-24AD89381ND
2014-02-24AD89381ND
2014-02-24AD89382ND
2017-01-1135288762005ND
2017-01-1135288762004ND
2017-01-1135288762003ND
2017-01-1135288762002ND
2017-01-1135288762001ND
2017-01-1135288762002ND
2017-01-1135288762003ND
2017-01-1135288762004ND
2017-01-1135288762005ND
2017-01-1135288762001ND
2017-09-2635338631001ND
2017-09-2635338631002ND
2017-09-2635338631001ND
2017-09-2635338631002ND