Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

Posey Township Water Corporation

NOTE: Posey Township Water Corporation purchases water from Patoka Lake Regional Water which is required to test for 2,4,5-tp (silvex). Sample information shown below was taken by Patoka Lake Regional Water.

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.

 

9

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019N/A00N/A
2020N/A00N/A
2021ND10ND
2022ND30ND
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

NOTE: Posey Township Water Corporation purchases water from Patoka Lake Regional Water which is required to test for 2,4,5-tp (silvex). Sample information shown below was taken by Patoka Lake Regional Water.

Date Lab ID Result
2018-05-16416929RS28-1802ND
2018-08-16426574RS28-1803ND
2021-08-184990899ND
2021-11-101-810-7353-1ND
2022-05-101-810-24180-1ND
2022-08-161-810-34359-1_INND
2022-11-081-810-43880-1_INND
2023-05-091-810-62557-1_INND
2023-08-091-810-73252-1_INND