Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

Clark Public Utilities

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.

 

28

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND60ND
2019ND120ND
2020N/A00N/A
2021ND10ND
2022ND80ND
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
2018-08-01ND
2018-08-01ND
2018-08-01ND
2018-08-28ND
2018-08-28ND
2018-08-28ND
2019-04-02ND
2019-04-03ND
2019-05-20ND
2019-05-20ND
2019-05-21ND
2019-06-13ND
2019-07-22ND
2019-07-22ND
2019-07-23ND
2019-08-28ND
2019-08-28ND
2019-12-10ND
2021-08-024171851ND
2022-03-314266381ND
2022-07-284328454ND
2022-07-284328450ND
2022-08-034328449ND
2022-08-034328447ND
2022-08-044328455ND
2022-08-044328460ND
2022-08-044328458ND
2023-09-194531527ND