Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

Okla Ordnance Works Authority

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.

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND10ND
2020ND30ND
2021ND40ND
2022ND30ND
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
2018-02-13AB14090-01ND
2019-08-28BH29006-01ND
2020-04-15CD15098-01ND
2020-07-29CG29059-01ND
2020-10-07CJ07076-01ND
2021-01-13DA13061-01ND
2021-04-21DD21050-01ND
2021-07-21DG21063-01ND
2021-10-27DJ27031-01ND
2022-02-22EB22113-01ND
2022-05-04EE04051-01ND
2022-08-03EH03080-01ND
2023-02-22FB22042-01RE1ND
2023-08-16FH16083-01ND