Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

City of The Dalles

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
2018ND60ND
2019N/A00N/A
2020N/A00N/A
2021ND80ND
2022N/A00N/A
2023N/A00N/A

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
2018-06-19V8F046801-SND
2018-06-19V8F046802-SND
2018-06-19V8F046803-SND
2018-09-24V8I043301-SND
2018-09-24V8I043302-SND
2018-09-24V8I043303-SND
2021-06-09VEF028102-SND
2021-06-09VEF028101-SND
2021-06-09VEF028103-SND
2021-06-09VEF028104-SND
2021-09-08202109090740-SND
2021-09-08202109090741-SND
2021-09-08202109090669-SND
2021-09-08202109090668-SND