Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

Boise City Public Works 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.

 

22

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019ND40ND
2020ND60ND
2021ND20ND
2022ND50ND
2023ND50ND

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
2019-07-16BG17050-01ND
2019-07-16BG17050-03ND
2019-10-28BJ29007-03ND
2019-10-28BJ29007-01ND
2020-01-28CA29007-01ND
2020-01-28CA29007-04ND
2020-04-15CD16011-01ND
2020-04-15CD16011-03ND
2020-07-28CG29011-01ND
2020-07-28CG29011-03ND
2021-03-10DC11022-03ND
2021-03-10DC11022-01ND
2022-08-08EH09140-02ND
2022-08-08EH09140-03ND
2022-08-08EH09140-04ND
2022-08-08EH09140-05ND
2022-08-09EH09140-01ND
2023-03-20FC21016-01ND
2023-03-20FC21016-02ND
2023-03-20FC21016-03ND
2023-03-20FC21016-04ND
2023-08-14FH15057-01ND