2,4,5-TP (Silvex)
Hastings
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.
24
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 | N/A | 0 | 0 | N/A |
| 2015 | ND | 6 | 0 | ND |
| 2016 | ND | 8 | 0 | ND |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 7 | 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 |
|---|---|---|
| 2015-02-19 | 15B0913-02 | ND |
| 2015-02-19 | 15B0913-03 | ND |
| 2015-02-19 | 15B0913-01 | ND |
| 2015-06-09 | 15F0596-01 | ND |
| 2015-06-09 | 15F0596-02 | ND |
| 2015-06-09 | 15F0596-03 | ND |
| 2016-03-22 | 3418442 | ND |
| 2016-03-22 | 3418462 | ND |
| 2016-03-22 | 3418500 | ND |
| 2016-03-22 | 3418530 | ND |
| 2016-03-22 | 3418538 | ND |
| 2016-05-31 | 3461086 | ND |
| 2016-05-31 | 3461091 | ND |
| 2016-05-31 | 3461069 | ND |
| 2018-08-17 | 18H1558-01 | ND |
| 2018-11-01 | 18K0050-01 | ND |
| 2018-11-01 | 18K0050-02 | ND |
| 2019-01-31 | 19A0995-01 | ND |
| 2019-01-31 | 19A0996-02 | ND |
| 2019-01-31 | 19A0996-03 | ND |
| 2019-03-08 | 19C0368-01 | ND |
| 2019-05-08 | 19E0519-01 | ND |
| 2019-05-08 | 19E0519-02 | ND |
| 2019-05-08 | 19E0519-03 | ND |