2,4,5-TP (Silvex)
City of San Jacinto
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | N/A | 0 | 0 | N/A |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | ND | 12 | 0 | ND |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 4 | 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 |
|---|---|---|
| 2016-01-20 | 4790-014-0847 | ND |
| 2016-01-27 | 4790-005-0840 | ND |
| 2016-01-27 | 4790-005-0950 | ND |
| 2016-01-27 | 4790-014-0825 | ND |
| 2016-02-10 | 4790-001-1020 | ND |
| 2016-02-16 | 4790-010-1450 | ND |
| 2016-02-23 | 4790-001-1430 | ND |
| 2016-03-02 | 4790-010-1420 | ND |
| 2016-04-05 | 4790-010-1535 | ND |
| 2016-04-12 | 4790-001-1504 | ND |
| 2016-04-19 | 4790-005-1400 | ND |
| 2016-06-28 | 4790-014-0800 | ND |
| 2019-03-20 | 4790-010-0701 | ND |
| 2019-03-27 | 4790-014-0701 | ND |
| 2019-12-10 | 4790-010-1330 | ND |
| 2019-12-11 | 4790-005-0900 | ND |