2,4,5-TP (Silvex)
California American Water Company - Monterey
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.
13
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 | 8 | 0 | ND |
| 2015 | ND | 1 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
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 |
|---|---|---|
| 2014-01-21 | 1225-089-1140 | ND |
| 2014-01-22 | 1225-092-1145 | ND |
| 2014-04-08 | 1225-082-1155 | ND |
| 2014-04-24 | 1225-092-1005 | ND |
| 2014-04-29 | 1225-089-1030 | ND |
| 2014-06-23 | 1225-073-0910 | ND |
| 2014-07-14 | 1225-082-1300 | ND |
| 2014-08-14 | 1225-050-1150 | ND |
| 2015-07-22 | 1225-070-0930 | ND |
| 2016-01-20 | 5810-087-1055 | ND |
| 2016-05-18 | 1225-087-1045 | ND |
| 2016-08-17 | 1225-087-1330 | ND |
| 2016-10-12 | 1225-087-0930 | ND |