Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

Smackover Waterworks

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
2018ND20ND
2019N/A00N/A
2020ND40ND
2021ND40ND
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
2018-01-3018032002302ND
2018-05-2218144007402ND
2020-01-2720030004508ND
2020-01-2720030004608ND
2020-06-0120156008502ND
2020-06-0120156008402ND
2021-03-0821070008302ND
2021-06-0721161000102ND
2021-08-2321238002401ND
2021-11-0821314008201ND
2022-01-2422027007302ND
2022-05-25O198474-MCP-1ND
2023-01-31O205868-MCP-1ND
2023-01-31O205869-MCP-1ND
2023-05-31O209481-MCP-1ND
2023-05-31O209480-MCP-1ND
2023-05-31O209479-MCP-1ND