Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

City of Milwaukie

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.

 

11

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
2019ND30ND
2020ND60ND
2021N/A00N/A
2022ND20ND
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
2019-12-02933701001-SND
2019-12-03933701101-SND
2019-12-04933802101-SND
2020-02-11004207503-SND
2020-02-11004207502-SND
2020-02-11004207501-SND
2020-04-20011100701-SND
2020-04-20011100702-SND
2020-04-20011100703-SND
2022-09-2822-011700-0001-SND
2022-12-0722-014976-0001-SND