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EWG's Tap Water Database — 2021 UPDATE

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2,4,5-TP (Silvex)

Fairview Union 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.

MORE ABOUT THIS CONTAMINANT

 

32

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND20ND
2015ND40ND
2016ND80ND
2017ND80ND
2018ND40ND
2019ND60ND

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
2014-04-14AD90605ND
2014-04-14AD90605ND
2015-03-0935178883001ND
2015-03-0935178883001ND
2015-10-1235211703001ND
2015-10-1235211703001ND
2016-03-2835236604007ND
2016-03-2835236604007ND
2016-04-1235239164008ND
2016-04-1235239164008ND
2016-06-1335250073010ND
2016-06-1335250073010ND
2016-11-2135279123006ND
2016-11-2135279123006ND
2017-03-2935303649005ND
2017-03-2935303649005ND
2017-04-1035306447002ND
2017-04-1035306447002ND
2017-06-0935318513012ND
2017-06-0935318513012ND
2017-10-2335344154001ND
2017-10-2335344154001ND
2018-01-2235370033001ND
2018-01-2235370033001ND
2018-07-3135408507001ND
2018-07-3135408507001ND
2019-02-2535450972001ND
2019-02-2535450972001ND
2019-08-2635493338001ND
2019-08-2635493338001ND
2019-09-2535500914001ND
2019-09-2535500914001ND