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EWG's Tap Water Database — 2021 UPDATE

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2,4,5-TP (Silvex)

Assumption Parish Waterworks District 1

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

 

26

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
2014ND80ND
2015ND20ND
2016ND40ND
2017ND40ND
2018ND40ND
2019ND40ND

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
2014-02-03AD88681ND
2014-02-03AD88681ND
2014-04-14AD90510ND
2014-04-14AD90510ND
2014-07-21AD93831ND
2014-07-21AD93831ND
2014-10-06AD98268ND
2014-10-06AD98268ND
2015-03-3135181766003ND
2015-03-3135181766003ND
2016-03-1535234393001ND
2016-03-1535234393001ND
2016-09-1935266189008ND
2016-09-1935266189008ND
2017-01-3135292293003ND
2017-01-3135292293003ND
2017-10-1635342351003ND
2017-10-1635342351003ND
2018-01-2535370415008ND
2018-01-2535370415008ND
2018-07-2335406285001ND
2018-07-2335406285001ND
2019-01-2935445085001ND
2019-01-2935445085001ND
2019-07-2435484850001ND
2019-07-2435484850001ND