2,4,5-TP (Silvex)
Troy Utilities
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.
40
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 | 4 | 0 | ND |
| 2015 | ND | 5 | 0 | ND |
| 2016 | ND | 12 | 0 | ND |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 19 | 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 |
|---|---|---|
| 2014-03-04 | 112403042014-2 | ND |
| 2014-06-03 | 112406032014-1 | ND |
| 2014-08-18 | 112408182014-2 | ND |
| 2014-10-14 | 112410142014-1S | ND |
| 2015-03-18 | 112403182015-1 | ND |
| 2015-05-19 | 1124-051915-SOC- | ND |
| 2015-05-19 | 112405192015-2 | ND |
| 2015-09-02 | 112409022015-2 | ND |
| 2015-10-20 | 112410202015-1S | ND |
| 2016-03-18 | 11243182016-1S | ND |
| 2016-04-06 | 1124-040616-5 | ND |
| 2016-04-06 | 1124-040616-SOC- | ND |
| 2016-04-06 | 1124-040616-SOC- | ND |
| 2016-04-06 | 1124-040616-4 | ND |
| 2016-04-06 | 1124-040616-SOC- | ND |
| 2016-04-06 | 1124-040616-6 | ND |
| 2016-11-02 | 112411022016-4S | ND |
| 2016-11-02 | 112411022016-5S | ND |
| 2016-11-02 | 112411022016-3S | ND |
| 2016-11-02 | 112411022016-1S | ND |
| 2016-11-02 | 112411022016-2S | ND |
| 2019-05-20 | 19050624-001A | ND |
| 2019-05-20 | 19050624-006A | ND |
| 2019-05-20 | 19050624-005A | ND |
| 2019-05-20 | 19050624-003A | ND |
| 2019-05-20 | 19050624-002A | ND |
| 2019-05-20 | 19050624-004A | ND |
| 2019-06-20 | 20109417001_ISOC | ND |
| 2019-08-21 | 20118202004_ISOC | ND |
| 2019-08-21 | 20118202003_ISOC | ND |
| 2019-08-21 | 20118202003_ISOC | ND |
| 2019-08-21 | 20118202002_ISOC | ND |
| 2019-08-21 | 20118202002_ISOC | ND |
| 2019-08-21 | 20118202001_ISOC | ND |
| 2019-08-21 | 20118202001_ISOC | ND |
| 2019-08-21 | 20118202006_ISOC | ND |
| 2019-08-21 | 20118202004_ISOC | ND |
| 2019-08-21 | 20118202006_ISOC | ND |
| 2019-08-21 | 20118202005_ISOC | ND |
| 2019-08-21 | 20118202005_ISOC | ND |