2,4,5-TP (Silvex)
Blaine
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.
20
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 | N/A | 0 | 0 | N/A |
| 2015 | ND | 5 | 0 | ND |
| 2016 | ND | 7 | 0 | ND |
| 2017 | ND | 1 | 0 | ND |
| 2018 | ND | 4 | 0 | ND |
| 2019 | ND | 3 | 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 |
|---|---|---|
| 2015-05-27 | 15E1985-02 | ND |
| 2015-05-27 | 15E1985-03 | ND |
| 2015-05-27 | 15E1985-01 | ND |
| 2015-09-24 | 15I1244-01 | ND |
| 2015-09-24 | 15I1244-02 | ND |
| 2016-03-03 | 16C0265-01 | ND |
| 2016-03-03 | 16C0266-01 | ND |
| 2016-03-03 | 16C0267-01 | ND |
| 2016-05-25 | 3457811 | ND |
| 2016-05-25 | 3457806 | ND |
| 2016-06-20 | 3474595 | ND |
| 2016-07-11 | 3490710 | ND |
| 2017-07-27 | 17G1931-01 | ND |
| 2018-02-28 | 18B1345-01 | ND |
| 2018-06-22 | 18F1667-01 | ND |
| 2018-06-22 | 18F1667-02 | ND |
| 2018-07-16 | 18G0770-01 | ND |
| 2019-08-01 | 19H0052-01 | ND |
| 2019-09-26 | 19I2644-01 | ND |
| 2019-10-30 | 19J1698-01 | ND |