Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

City of Wilsonville

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.

 

19

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND40ND
2020ND40ND
2021ND30ND
2022ND20ND
2023ND20ND

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
2018-01-10201712040042-SND
2018-04-11201803050004-SND
2018-07-18201807190944-SND
2018-10-10201809030044-SND
2019-01-09201812030009-SND
2019-04-10201904110241-SND
2019-07-10201907110430-SND
2019-10-08201910090408-SND
2020-01-02202001030119-SND
2020-04-15202004160157-SND
2020-07-15202007160188-SND
2020-10-14202010150105-SND
2021-01-06202101070374-SND
2021-04-14202104150878-SND
2021-07-27202107280247-SND
2022-02-02202202030907-SND
2022-04-13202204140832-SND
2023-01-11380-34174-2-SND
2023-06-06380-50204-1-SND