Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

South Grayson Special Utility District

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.

 

11

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019N/A00N/A
2020ND40ND
2021ND10ND
2022N/A00N/A
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
2018-02-06Q1804974005ND
2018-05-04Q1818259002ND
2020-08-06Q2031194026ND
2020-08-06Q2031194029ND
2020-08-06Q2031194030ND
2020-08-06Q2031194031ND
2021-06-16Q2115771005ND
2023-05-16Q2318439002ND
2023-05-16Q2318439025ND
2023-05-16Q2318439026ND
2023-05-16Q2318439027ND