Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

Stillwater

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.

 

30

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
2020ND150ND
2021ND10ND
2022N/A00N/A
2023ND140ND

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
2020-05-2120E1392-02ND
2020-05-2120E1392-03ND
2020-05-2120E1392-04ND
2020-05-2120E1395-01ND
2020-05-2120E1395-02ND
2020-05-2120E1392-01ND
2020-07-2920G2148-01ND
2020-07-2920G2148-02ND
2020-07-2920G2148-03ND
2020-07-2920G2149-01ND
2020-07-2920G2149-02ND
2020-07-2920G2149-03ND
2020-07-2920G2149-04ND
2020-10-1420J0667-01ND
2020-10-1420J0667-02ND
2021-02-2421B1311-02ND
2023-04-2723D1694-02ND
2023-04-2723D1694-03ND
2023-04-2723D1694-04ND
2023-04-2723D1698-01ND
2023-04-2723D1698-02ND
2023-04-2723D1698-03ND
2023-04-2723D1698-04ND
2023-08-1623H1903-01ND
2023-08-1623H1903-02ND
2023-08-1623H1903-03ND
2023-08-1623H1903-04ND
2023-08-1623H1906-01ND
2023-08-1623H1906-02ND
2023-08-1623H1906-03ND