Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

Western Hills Water System

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
2018ND10ND
2019ND10ND
2020ND40ND
2021ND10ND
2022ND10ND
2023ND40ND

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
2018-09-18AE40838ND
2019-06-17AE71195ND
2020-06-15AF15249ND
2020-06-15AF15250ND
2020-06-15AF15251ND
2020-06-15AF15252ND
2021-08-03AF64550ND
2022-10-04AG15960ND
2023-07-12AG48286ND
2023-07-12AG48287ND
2023-07-12AG48288ND
2023-07-12AG48289ND