Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

The Mountain Water System

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.

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019ND20ND
2020ND30ND
2021ND30ND
2022ND30ND
2023ND30ND

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
2019-02-26680-165148-1ND
2019-02-26680-165152-1ND
2020-03-18481645ND
2020-09-02497125ND
2020-12-15506069ND
2021-03-161034274-01ND
2021-05-111053573-01ND
2021-08-181085286-01ND
2022-09-20FWH0472-01ND
2022-09-20FWJ0174ND
2022-12-13FWJ0174-01ND
2023-02-16FXB0443-01ND
2023-04-05FXC0477ND
2023-08-03FXF0558ND