Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

2,4,5-TP (Silvex)

City of Conroe

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
2014ND100ND
2015N/A00N/A
2016ND20ND
2017ND100ND
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
2014-04-09AC49990ND
2014-04-09AC49988ND
2014-04-09AC49991ND
2014-04-09AC49992ND
2014-04-09AC49986ND
2014-04-09AC49989ND
2014-04-09AC49993ND
2014-04-09AC49994ND
2014-04-09AC49984ND
2014-05-28AC55356ND
2016-01-11AD17401ND
2016-01-11AD17403ND
2017-01-09AD63709ND
2017-01-09AD63713ND
2017-01-09AD63714ND
2017-04-11AD79265ND
2017-04-11AD79267ND
2017-04-11AD79266ND
2017-05-18AD84931ND
2017-05-18AD84933ND
2017-05-18AD84932ND
2017-05-18AD84930ND
2018-03-08AE17657ND
2018-03-08AE17656ND
2018-05-08AE25626ND
2018-05-08AE25627ND
2018-07-02AE32305ND
2018-07-02AE32308ND
2018-10-01AE42275ND
2018-10-01AE42279ND
2019-03-11AE57897ND
2019-03-11AE57898ND