2,4,5-TP (Silvex)
Three Valleys Municipal Water District
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.
16
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 | 2 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 5 | 0 | ND |
| 2017 | ND | 4 | 0 | ND |
| 2018 | ND | 2 | 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 |
|---|---|---|
| 2014-06-10 | 3761-004-1030 | ND |
| 2014-09-16 | 3761-004-1101 | ND |
| 2015-03-10 | 3761-002-0930 | ND |
| 2015-06-09 | 3761-004-0940 | ND |
| 2016-03-15 | 3761-002-0900 | ND |
| 2016-06-21 | 3761-002-1030 | ND |
| 2016-06-21 | 3761-004-1006 | ND |
| 2016-09-13 | 3761-002-1000 | ND |
| 2016-12-13 | 3761-002-1020 | ND |
| 2017-03-21 | 3761-004-1040 | ND |
| 2017-06-21 | 3761-002-1000 | ND |
| 2017-06-21 | 3761-004-1100 | ND |
| 2017-09-12 | 3761-002-0900 | ND |
| 2018-06-12 | 3761-004-0000 | ND |
| 2018-09-11 | 3761-002-1045 | ND |
| 2019-09-17 | 3761-002-1005 | ND |