Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

Assumption Parish Waterworks District 1

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.

 

17

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
2023ND30ND

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
2018-01-2535370415008ND
2018-01-2535370415008ND
2018-07-2335406285001ND
2018-07-2335406285001ND
2019-01-2935445085001ND
2019-01-2935445085001ND
2019-07-2435484850001ND
2019-07-2435484850001ND
2020-03-2335539297001ND
2020-10-1535585526001ND
2021-03-2535621778001ND
2021-11-0435675771001ND
2022-02-1035696476001ND
2022-08-2535742736001ND
2023-02-2735782417001ND
2023-09-1935829323001ND
2023-10-2335836720001ND