Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

City of Troutdale

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.

 

26

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
2020ND140ND
2021N/A00N/A
2022ND120ND
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
2020-07-29VDG012105-SND
2020-07-29VDG012113-SND
2020-07-29VDG012101-SND
2020-07-29VDG012111-SND
2020-07-29VDG012109-SND
2020-07-29VDG012103-SND
2020-07-29VDG012107-SND
2020-10-13VDI062001-SND
2020-10-13VDI062007-SND
2020-10-13VDI062013-SND
2020-10-13VDI062003-SND
2020-10-13VDI062011-SND
2020-10-13VDI062005-SND
2020-10-13VDI062009-SND
2022-05-3122-006289-0004-SND
2022-05-3122-006289-0001-SND
2022-05-3122-006289-0002-SND
2022-05-3122-006289-0003-SND
2022-05-3122-006289-0005-SND
2022-05-3122-006289-0006-SND
2022-08-3022-010340-0003-SND
2022-08-3022-010340-0004-SND
2022-08-3022-010340-0005-SND
2022-08-3022-010340-0001-SND
2022-08-3022-010340-0006-SND
2022-08-3022-010340-0002-SND