Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

Bear Valley Joint Authority

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.

 

15

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND20ND
2020ND50ND
2021N/A00N/A
2022N/A00N/A
2023ND40ND

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
2018-04-248045215-01ND
2018-05-298055386-01ND
2018-07-178074944-01ND
2018-11-278114887-01ND
2019-02-199024042-01ND
2019-11-139036887-01ND
2020-01-2921798040.00ND
2020-04-1522362555.00ND
2020-04-2922362576.00ND
2020-07-2922949612.00ND
2020-08-1923136912.00ND
2023-05-1529053720.00ND
2023-05-1529053735.00ND
2023-07-1829651638.00ND
2023-07-1829651673.00ND