Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

2,4,5-TP (Silvex)

City of Kerrville

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.

 

20

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND10ND
2013ND10ND
2014ND50ND
2015N/A00N/A
2016ND10ND
2017ND120ND

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
2012-10-041210228009ND
2013-01-23AC08569ND
2014-04-07AC49530ND
2014-04-07AC49531ND
2014-07-16AC59858ND
2014-10-15AC69754ND
2014-10-15AC69753ND
2016-02-01AD21211ND
2017-04-06AD78785ND
2017-05-08AD83154ND
2017-05-08AD83157ND
2017-05-09AD83416ND
2017-05-09AD83421ND
2017-05-09AD83420ND
2017-05-22AD85094ND
2017-07-05AD88358ND
2017-07-05AD88359ND
2017-07-05AD88360ND
2017-10-09AD99895ND
2017-10-09AD99896ND