Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

Rapides Parish Waterworks District 3

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND40ND
2020ND60ND
2021ND30ND
2022ND20ND
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
2018-03-2235381823001ND
2018-03-2235381823001ND
2018-09-1835418764001ND
2018-09-1835418764001ND
2019-04-1735463257001ND
2019-04-1735463257001ND
2019-08-2935494339001ND
2019-08-2935494339001ND
2020-01-2135525783002ND
2020-01-2135525783003ND
2020-01-2135525783001ND
2020-03-1135537099001ND
2020-04-2235545475001ND
2020-10-1235585145001ND
2021-05-0535631376001ND
2021-05-0535631376002ND
2021-10-0535668364001ND
2022-04-1835712509001ND
2022-10-1135753324001ND
2023-01-1835773982001ND
2023-01-1835773982002ND
2023-01-1835773982003ND
2023-04-0335790618001ND
2023-10-1635835809001ND