Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

Vivian 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.

 

17

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND40ND
2020ND30ND
2021ND20ND
2022ND10ND
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
2018-01-0835367519001ND
2018-01-0835367519001ND
2018-07-2335407296001ND
2018-07-2335407296001ND
2019-02-1835449625001ND
2019-02-1835449625001ND
2019-07-2535485237001ND
2019-07-2535485237001ND
2020-02-1135530385001ND
2020-08-0435567924001ND
2020-08-0435567926001ND
2021-01-0535602530001ND
2021-08-1035655130001ND
2022-02-1435697796001ND
2023-01-3035776976005ND
2023-08-1535821489001ND
2023-12-1235848285001ND