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EWG's Tap Water Database — 2019 UPDATE

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2,4,5-TP (Silvex)

Jordan Valley Water Conservancy District

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.

 

32

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND40ND
2014ND50ND
2015ND50ND
2016ND50ND
2017ND110ND

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 Result
2012-07-18ND
2012-12-12ND
2013-06-26ND
2013-08-27ND
2013-10-29ND
2013-10-29ND
2014-01-02ND
2014-06-03ND
2014-06-04ND
2014-06-04ND
2014-07-15ND
2015-01-13ND
2015-02-11ND
2015-02-26ND
2015-07-07ND
2015-07-21ND
2016-01-06ND
2016-02-16ND
2016-04-05ND
2016-04-25ND
2016-07-18ND
2017-01-03ND
2017-01-03ND
2017-01-04ND
2017-01-04ND
2017-01-23ND
2017-05-03ND
2017-06-07ND
2017-06-08ND
2017-07-10ND
2017-07-12ND
2017-08-14ND