Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

City of Pendleton

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.

 

12

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
2020ND70ND
2021N/A00N/A
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

Date Lab ID Result
2020-08-052050689-SND
2020-08-052050686-SND
2020-08-052050687-SND
2020-08-052050688-SND
2020-10-072067982-SND
2020-10-072067980-SND
2020-10-072067981-SND
2022-08-2422-55260-SND
2022-10-0322-64017-SND
2023-08-0123-45531-SND
2023-08-0123-45523-SND
2023-08-0123-45527-SND