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EWG's Tap Water Database — 2021 UPDATE

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2,4,5-TP (Silvex)

Paw Penn District

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
2014ND160ND
2015N/A00N/A
2016N/A00N/A
2017ND140ND
2018N/A00N/A
2019ND20ND

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
2014-04-0125337701ND
2014-04-0125337901ND
2014-04-0225337201ND
2014-04-0225338601ND
2014-04-0225337501ND
2014-04-0425337101ND
2014-04-0425338401ND
2014-04-0425338101ND
2014-07-0726114201ND
2014-07-0726113001ND
2014-07-0726113501ND
2014-07-0926113701ND
2014-07-0926114001ND
2014-07-0926113301ND
2014-07-0926113101ND
2014-09-0426113901ND
2017-04-0315975914ND
2017-04-0315975883ND
2017-04-0315975852ND
2017-04-0315975823ND
2017-04-0315975792ND
2017-04-0315975945ND
2017-04-0315975763ND
2017-07-0616450240ND
2017-07-0616450269ND
2017-07-0616450300ND
2017-07-0616450362ND
2017-07-1116450182ND
2017-07-1116450331ND
2017-07-1116450211ND
2019-07-1545716201ND
2019-10-3143999701ND