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EWG's Tap Water Database — 2021 UPDATE

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2,4,5-TP (Silvex)

City of Vacaville

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

 

31

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND110ND
2015N/A00N/A
2016N/A00N/A
2017ND200ND
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
2014-01-215810-030-1314ND
2014-01-215810-001-1206ND
2014-01-215810-003-1117ND
2014-01-215810-004-1142ND
2014-01-215810-006-1054ND
2014-01-215810-007-0931ND
2014-01-215810-009-1029ND
2014-01-215810-010-1002ND
2014-01-215810-012-1233ND
2014-01-215810-024-1255ND
2014-06-185810-002-0740ND
2017-01-105810-024-1035ND
2017-01-245810-006-0840ND
2017-01-245810-009-0813ND
2017-01-245810-003-0935ND
2017-01-245810-001-1000ND
2017-01-245810-002-0903ND
2017-02-025810-010-1002ND
2017-02-025810-012-1041ND
2017-02-025810-030-1111ND
2017-03-235810-007-1146ND
2017-08-035810-012-0859ND
2017-08-035810-030-0950ND
2017-08-035810-024-0925ND
2017-08-035810-009-0804ND
2017-08-035810-001-0829ND
2017-08-155810-010-0829ND
2017-08-155810-007-0916ND
2017-08-155810-006-0854ND
2017-08-155810-003-0810ND
2017-08-155810-002-0742ND