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EWG's Tap Water Database — 2021 UPDATE

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2,4,5-TP (Silvex)

Yorktown Water

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

 

28

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND140ND
2015N/A00N/A
2016N/A00N/A
2017ND140ND
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
2014-08-1114226000702ND
2014-08-1114226000102ND
2014-08-1114226000602ND
2014-08-1114226000202ND
2014-08-1114226000402ND
2014-08-1114226000302ND
2014-08-1114226000502ND
2014-10-2114296009502ND
2014-10-2114296009802ND
2014-10-2114296009602ND
2014-10-2114296010002ND
2014-10-2114296009902ND
2014-10-2114296009702ND
2014-10-2114296009402ND
2017-08-0717222000902ND
2017-08-0717222001607ND
2017-08-0717222001002ND
2017-08-0717222001102ND
2017-08-0717222001202ND
2017-08-0717222001302ND
2017-08-0717222001507ND
2017-10-1717292005402ND
2017-10-1717292005502ND
2017-10-1717292005602ND
2017-10-1717292005802ND
2017-10-1717292005302ND
2017-10-1717292005702ND
2017-10-1717292005902ND