Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

Fort Bend County Municipal Utility District 46

NOTE: Fort Bend County Municipal Utility District 46 purchases water from City of Missouri City Mustang Bayou Wate which is required to test for 2,4,5-tp (silvex). Sample information shown below was taken by City of Missouri City Mustang Bayou Wate.

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.

 

13

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019ND10ND
2020ND10ND
2021ND50ND
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: Fort Bend County Municipal Utility District 46 purchases water from City of Missouri City Mustang Bayou Wate which is required to test for 2,4,5-tp (silvex). Sample information shown below was taken by City of Missouri City Mustang Bayou Wate.

Date Lab ID Result
2018-02-28AE16115ND
2018-05-01AE24646ND
2018-05-01AE24647ND
2019-04-18AE63022ND
2020-07-16AF19759ND
2020-12-15AF37722ND
2021-02-26AF44724ND
2021-02-26AF44726ND
2021-05-12AF53642ND
2021-05-12AF53652ND
2021-08-10AF65686ND
2022-05-17AF97310ND
2023-05-04AG39434ND