2,4,5-TP (Silvex)
North Texas Municipal Water District - Bonham Water Treatment Plant
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
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2012 | ND | 3 | 0 | ND |
| 2013 | ND | 1 | 0 | ND |
| 2014 | ND | 1 | 0 | ND |
| 2015 | ND | 1 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 1 | 0 | ND |
ppb = parts per billion
State and national drinking water standards and health guidelines
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 |
|---|---|---|
| 2012-03-05 | 1203120003 | ND |
| 2012-06-04 | 1206070002 | ND |
| 2012-08-21 | 1208A51004 | ND |
| 2013-03-07 | 1303267006 | ND |
| 2014-02-04 | Q1403415003 | ND |
| 2015-05-19 | Q1518440004 | ND |
| 2016-07-27 | Q1630662007 | ND |
| 2017-08-07 | Q1732975006 | ND |