Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

City of Beaverton

NOTE: City of Beaverton purchases water from Joint Water Commission which is required to test for 2,4,5-tp (silvex). Sample information shown below was taken by Joint Water Commission.

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.

 

13

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND20ND
2020ND20ND
2021ND20ND
2022ND20ND
2023ND30ND

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

NOTE: City of Beaverton purchases water from Joint Water Commission which is required to test for 2,4,5-tp (silvex). Sample information shown below was taken by Joint Water Commission.

Date Lab ID Result
2018-02-071809141-SND
2018-11-051884309-SND
2019-04-241928990-SND
2019-11-041981259-SND
2020-04-012021410-SND
2020-07-012041305-SND
2020-11-042074464-SND
2021-04-072123196-SND
2021-11-032180746-SND
2022-03-312221620-SND
2022-11-0222-71086-SND
2023-04-1023-19659-SND
2023-11-0623-67462-SND