Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

Bossier City Water System

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.

 

16

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

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

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
2018-01-2335370031001ND
2018-01-2335370031001ND
2018-07-3135408509001ND
2018-07-3135408509001ND
2019-02-2535450969001ND
2019-02-2535450969001ND
2019-07-3135486402001ND
2019-07-3135486402001ND
2020-03-1635538194001ND
2020-08-1135569893001ND
2021-02-0335609510001ND
2021-08-0535653536002ND
2022-01-2735693462008ND
2022-07-2735735463001ND
2023-01-3035776976002ND
2023-08-1535821480001ND