Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

Othello Water Department

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
2018ND20ND
2019ND40ND
2020N/A00N/A
2021ND80ND
2022ND40ND
2023ND10ND

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
2018-03-15ND
2018-12-13ND
2019-04-17ND
2019-04-17ND
2019-04-22ND
2019-07-08ND
2021-03-314102004ND
2021-04-124101994ND
2021-06-104129201ND
2021-06-104129202ND
2021-08-114169056ND
2021-08-114171845ND
2021-10-134202797ND
2021-10-134202796ND
2022-03-154263811ND
2022-04-124273267ND
2022-06-024304316ND
2022-09-064357108ND
2023-09-114531622ND