2,4,5-TP (Silvex)
City of Tyler
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.
15
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 |
|---|---|---|---|---|
| 2014 | ND | 7 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 4 | 0 | ND |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 2 | 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 |
|---|---|---|
| 2014-03-31 | Q1410257006 | ND |
| 2014-06-18 | Q1421982008 | ND |
| 2014-06-18 | Q1421982009 | ND |
| 2014-12-03 | Q1458264007 | ND |
| 2014-12-03 | Q1458264008 | ND |
| 2014-12-03 | Q1458264024 | ND |
| 2014-12-22 | Q1460752010 | ND |
| 2016-01-07 | Q1600562017 | ND |
| 2016-01-07 | Q1600562018 | ND |
| 2017-05-02 | Q1718006006 | ND |
| 2017-09-06 | Q1741543008 | ND |
| 2017-11-09 | Q1757796012 | ND |
| 2017-11-09 | Q1757796003 | ND |
| 2019-01-16 | Q1902313009 | ND |
| 2019-01-16 | Q1902313010 | ND |