2,4,5-TP (Silvex)
Crest Hill
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.
21
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 | 10 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | ND | 9 | 0 | ND |
| 2018 | ND | 1 | 0 | ND |
| 2019 | 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 |
|---|---|---|
| 2014-02-05 | SB40142-01_01 | ND |
| 2014-02-05 | SB40140-01_01 | ND |
| 2014-02-05 | SB40141-01_01 | ND |
| 2014-02-05 | SB40143-01_01 | ND |
| 2014-02-05 | SB40144-01_01 | ND |
| 2014-06-05 | SF40228-01_01 | ND |
| 2014-06-05 | SF40231-01_01 | ND |
| 2014-06-05 | SF40229-01_01 | ND |
| 2014-06-05 | SF40227-01_01 | ND |
| 2014-06-05 | SF40225-01_01 | ND |
| 2017-01-31 | 1702020-001C | ND |
| 2017-01-31 | 1702020-010C | ND |
| 2017-01-31 | 1702020-007C | ND |
| 2017-01-31 | 1702020-004C | ND |
| 2017-04-19 | 1704D33-004C | ND |
| 2017-04-19 | 1704D33-007C | ND |
| 2017-04-19 | 1704D33-001C | ND |
| 2017-04-19 | 1704D33-010C | ND |
| 2017-12-28 | 1801130-001C | ND |
| 2018-06-26 | 18F1104-01_02 | ND |
| 2019-12-26 | 9124547-01 | ND |