Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

Stanley Lake Municipal Utility 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.

 

12

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
2020ND40ND
2021ND20ND
2022ND20ND
2023ND40ND

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
2020-08-11AF22950ND
2020-08-11AF22951ND
2020-08-11AF22953ND
2020-11-20AF35534ND
2021-01-14AF39596ND
2021-04-14AF50205ND
2022-08-04AG07952ND
2022-10-18AG17452ND
2023-01-25AG26309ND
2023-01-25AG26314ND
2023-01-25AG26321ND
2023-04-10AG36126ND