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EWG's Tap Water Database — 2021 UPDATE

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2,4,5-TP (Silvex)

Bella Vista 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.

MORE ABOUT THIS CONTAMINANT

 

61

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND310ND
2015N/A00N/A
2016N/A00N/A
2017ND80ND
2018N/A00N/A
2019ND220ND

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
2014-01-142958547ND
2014-01-142958539ND
2014-01-142958505ND
2014-01-142958497ND
2014-01-142958449ND
2014-01-1429584232ND
2014-01-142958302ND
2014-01-142958232ND
2014-01-142958225ND
2014-01-142958200ND
2014-01-152959277ND
2014-01-152959269ND
2014-01-152959491ND
2014-01-152959509ND
2014-01-152959501ND
2014-01-152969261ND
2014-08-133084005ND
2014-08-133084013ND
2014-08-133084022SND
2014-08-133084029ND
2014-08-133084037ND
2014-08-133084047ND
2014-08-143084323ND
2014-08-143084315ND
2014-08-143084307ND
2014-08-143084299ND
2014-08-143084291ND
2014-08-143084283ND
2014-08-143084275ND
2014-08-143084267ND
2014-08-213089438ND
2017-01-043617215ND
2017-01-043617209ND
2017-01-043616725ND
2017-01-043616719ND
2017-07-183737777ND
2017-07-183737771ND
2017-07-183737765ND
2017-07-183737759ND
2019-01-284185328ND
2019-01-284185322ND
2019-01-284185316ND
2019-01-284185310ND
2019-01-314186729ND
2019-01-314186735ND
2019-01-314186741ND
2019-02-014188469ND
2019-02-014188463ND
2019-02-014188457ND
2019-02-014188451ND
2019-04-034249753ND
2019-04-034249747ND
2019-04-034249741ND
2019-04-034249735ND
2019-04-044250333ND
2019-04-044250327ND
2019-04-044250303ND
2019-04-044250297ND
2019-05-064285048ND
2019-05-064285050ND
2019-05-064285049ND