Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

Western Cass Water Supply Corporation

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
2018N/A00N/A
2019N/A00N/A
2020ND90ND
2021N/A00N/A
2022N/A00N/A
2023ND60ND

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
2020-03-19Q2011997008ND
2020-03-19Q2011997019ND
2020-04-21Q2015767024ND
2020-04-21Q2015767025ND
2020-04-21Q2015767026ND
2020-04-21Q2015767027ND
2020-04-21Q2015767040ND
2020-07-28Q2029440009ND
2020-10-22Q2041222009ND
2023-08-01Q2331111003ND
2023-08-01Q2331111014ND
2023-10-02Q2342120002ND
2023-10-02Q2342120018ND
2023-10-02Q2342120019ND
2023-10-02Q2342120020ND