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EWG's Tap Water Database — 2019 UPDATE

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2,4,5-TP (Silvex)

Salt Lake City Water System

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.

 

102

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND120ND
2013ND110ND
2014ND150ND
2015ND190ND
2016ND250ND
2017ND200ND

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
2012-06-01ND
2012-07-17ND
2012-07-17ND
2012-07-20ND
2012-07-20ND
2012-07-31ND
2012-07-31ND
2012-07-31ND
2012-08-29ND
2012-08-29ND
2012-08-29ND
2012-09-21ND
2013-01-25ND
2013-01-25ND
2013-04-15ND
2013-04-15ND
2013-04-23ND
2013-05-10ND
2013-05-15ND
2013-05-15ND
2013-06-28ND
2013-06-28ND
2013-07-30ND
2014-01-10ND
2014-01-31ND
2014-01-31ND
2014-05-23ND
2014-05-30ND
2014-05-30ND
2014-06-03ND
2014-06-06ND
2014-06-11ND
2014-06-25ND
2014-06-25ND
2014-07-09ND
2014-07-09ND
2014-07-09ND
2014-07-11ND
2015-01-23ND
2015-01-30ND
2015-01-30ND
2015-02-27ND
2015-05-01ND
2015-05-08ND
2015-05-15ND
2015-06-19ND
2015-06-19ND
2015-06-19ND
2015-06-19ND
2015-06-30ND
2015-06-30ND
2015-06-30ND
2015-06-30ND
2015-06-30ND
2015-07-10ND
2015-07-10ND
2015-07-10ND
2016-01-08ND
2016-01-08ND
2016-01-15ND
2016-02-12ND
2016-02-26ND
2016-03-25ND
2016-05-19ND
2016-05-19ND
2016-06-03ND
2016-06-03ND
2016-06-10ND
2016-06-10ND
2016-06-10ND
2016-06-24ND
2016-06-24ND
2016-06-24ND
2016-06-28ND
2016-06-28ND
2016-07-01ND
2016-07-08ND
2016-07-08ND
2016-07-13ND
2016-07-29ND
2016-07-29ND
2016-07-29ND
2017-01-13ND
2017-01-16ND
2017-03-06ND
2017-03-24ND
2017-06-09ND
2017-06-12ND
2017-06-16ND
2017-06-19ND
2017-06-19ND
2017-06-21ND
2017-06-23ND
2017-06-30ND
2017-06-30ND
2017-07-14ND
2017-07-14ND
2017-07-21ND
2017-07-25ND
2017-08-08ND
2017-08-22ND
2017-08-23ND