Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

North Central Texas Municipal Water Authority

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.

 

11

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND10ND
2020ND10ND
2021ND40ND
2022ND20ND
2023ND10ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2018-02-13Q1806366008ND
2018-02-13Q1806366009ND
2019-03-07Q1909867002ND
2020-05-26Q2020617004ND
2021-05-18Q2112967007ND
2021-05-18Q2112967017ND
2021-08-24Q2122978016ND
2021-12-09Q2134685007ND
2022-03-02Q2207242015ND
2022-09-07Q2226614013ND
2023-03-08Q2309188003ND