2,4,5-TP (Silvex)
Benbrook 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.
22
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 10 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 8 | 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 |
|---|---|---|
| 2014-02-04 | Q1403610027 | ND |
| 2014-02-04 | Q1403610026 | ND |
| 2014-02-04 | Q1403610025 | ND |
| 2014-02-04 | Q1403610024 | ND |
| 2014-02-04 | Q1403610023 | ND |
| 2014-02-04 | Q1403610022 | ND |
| 2014-02-04 | Q1403610021 | ND |
| 2014-04-02 | Q1410443013 | ND |
| 2014-04-02 | Q1410443004 | ND |
| 2014-08-14 | Q1436874016 | ND |
| 2016-01-21 | Q1602764015 | ND |
| 2016-01-21 | Q1602764014 | ND |
| 2017-01-31 | Q1704261013 | ND |
| 2017-08-01 | Q1731488033 | ND |
| 2017-08-01 | Q1731488032 | ND |
| 2017-08-01 | Q1731488031 | ND |
| 2017-08-02 | Q1732390003 | ND |
| 2017-11-08 | Q1757459024 | ND |
| 2017-11-08 | Q1757459001 | ND |
| 2017-11-08 | Q1757459023 | ND |
| 2019-01-29 | Q1904088025 | ND |
| 2019-01-29 | Q1904088016 | ND |