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EWG's Tap Water Database — 2021 UPDATE

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2,4,5-TP (Silvex)

Clwsc Canyon Lake Shores

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

 

35

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND90ND
2015ND10ND
2016ND70ND
2017ND70ND
2018ND40ND
2019ND70ND

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
2014-02-18AC43372ND
2014-04-30AC52428ND
2014-04-30AC52431ND
2014-04-30AC52430ND
2014-09-03AC65690ND
2014-09-03AC65693ND
2014-09-03AC65686ND
2014-10-08AC69227ND
2014-10-08AC69226ND
2015-03-26AC86382ND
2016-02-03AD21926ND
2016-02-03AD21925ND
2016-02-03AD21922ND
2016-03-09AD27997ND
2016-03-09AD28002ND
2016-04-27AD34497ND
2016-04-27AD34498ND
2017-01-25AD66888ND
2017-01-25AD66887ND
2017-01-25AD66890ND
2017-02-24AD72218ND
2017-02-24AD72217ND
2017-06-27AD87954ND
2017-10-05AD99624ND
2018-02-07AE12824ND
2018-05-16AE26630ND
2018-07-26AE34728ND
2018-11-06AE45470ND
2019-02-06AE53257ND
2019-02-06AE53256ND
2019-02-06AE53263ND
2019-04-23AE63411ND
2019-10-30AE88026ND
2019-10-30AE88025ND
2019-10-30AE88024ND