Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

Metropolitan Utilities District

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.

 

13

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND20ND
2020ND20ND
2021ND10ND
2022ND10ND
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
2018-05-21546381ND
2018-07-16560814ND
2019-07-15621273ND
2019-07-15621274ND
2020-07-07684324ND
2020-07-07684323ND
2021-07-06746188ND
2022-07-11809376ND
2023-01-17844807ND
2023-01-17844808ND
2023-01-17844809ND
2023-07-17873552ND
2023-07-17873553ND