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EWG's Tap Water Database — 2021 UPDATE

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2,4,5-TP (Silvex)

North Kona

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

 

42

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND180ND
2015ND20ND
2016N/A00N/A
2017ND120ND
2018ND80ND
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
2014-03-18C14-03-0148AND
2014-03-18C14-03-0149AND
2014-03-18C14-03-0150AND
2014-03-18C14-03-0151AND
2014-03-18C14-03-0152AND
2014-03-18C14-03-0153AND
2014-03-18C14-03-0154AND
2014-03-18C14-03-0155AND
2014-03-18C14-03-0147AND
2014-04-15C14-04-0148AND
2014-04-15C14-04-0150AND
2014-04-15C14-04-0149AND
2014-04-15C14-04-0147AND
2014-04-15C14-04-0146AND
2014-04-15C14-04-0145AND
2014-04-15C14-04-0144ND
2014-04-15C14-04-0143ND
2014-07-07C14-07-0094AND
2015-08-19201508150137ND
2015-11-18201508150170ND
2017-03-14ND
2017-03-14ND
2017-03-14ND
2017-03-14ND
2017-03-14ND
2017-03-14ND
2017-06-05ND
2017-06-05ND
2017-06-05ND
2017-06-05ND
2017-06-05ND
2017-06-05ND
2018-01-17C18-01-0085AND
2018-01-17C18-01-0086AND
2018-06-18C18-06-0129AND
2018-07-08201805230559ND
2018-09-24C18-09-0286AND
2018-10-15201810170192ND
2018-12-03C18-12-0016AND
2018-12-03C18-12-0017AND
2019-09-09201909100461ND
2019-10-09C19-10-0031AND