Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

City of Oyster Creek

NOTE: City of Oyster Creek purchases water from Brazosport Water Authority which is required to test for 2,4,5-tp (silvex). Sample information shown below was taken by Brazosport Water 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.

 

8

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND10ND
2020ND10ND
2021ND10ND
2022ND10ND
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

NOTE: City of Oyster Creek purchases water from Brazosport Water Authority which is required to test for 2,4,5-tp (silvex). Sample information shown below was taken by Brazosport Water Authority.

Date Lab ID Result
2018-01-22AE09661ND
2019-02-07AE53589ND
2020-03-17AF03340ND
2021-01-21AF40428ND
2022-01-24AF81413ND
2023-05-15AG40580ND
2023-08-24AG54085ND
2023-11-13AG63408ND