Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

Dean Dale Special Utility District

NOTE: Dean Dale Special Utility District purchases water from City of Wichita Falls which is required to test for 2,4,5-tp (silvex). Sample information shown below was taken by City of Wichita Falls.

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.

 

10

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
2021ND20ND
2022ND10ND
2023ND10ND

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: Dean Dale Special Utility District purchases water from City of Wichita Falls which is required to test for 2,4,5-tp (silvex). Sample information shown below was taken by City of Wichita Falls.

Date Lab ID Result
2018-11-14Q1846491007ND
2019-08-19Q1956634006ND
2020-02-25Q2006937003ND
2020-06-02Q2021821001ND
2020-09-03Q2035218003ND
2020-11-10Q2044047011ND
2021-02-03Q2103346009ND
2021-08-16Q2121825007ND
2022-08-17Q2224340013ND
2023-08-21Q2335127016ND