2,4,5-TP (Silvex)
Regional Water Authority
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.
66
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 | 23 | 0 | ND |
| 2017 | ND | 4 | 0 | ND |
| 2018 | ND | 4 | 0 | ND |
| 2019 | ND | 26 | 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 |
|---|---|---|
| 2014-12-09 | SOCR 200409186 | ND |
| 2014-12-09 | SOCR 200409185 | ND |
| 2014-12-09 | SOCR 200409203 | ND |
| 2014-12-09 | SOCR 200409202 | ND |
| 2015-03-03 | SOCR 200412990 | ND |
| 2015-03-03 | SOCR 200412991 | ND |
| 2015-03-03 | SOCR 200412906 | ND |
| 2015-03-04 | SOCR 200413024 | ND |
| 2015-06-25 | SOC 200419193 | ND |
| 2016-02-29 | SOCR 200434389 | ND |
| 2016-02-29 | SOCR 200434374 | ND |
| 2016-02-29 | SOCR 200434388 | ND |
| 2016-02-29 | SOCR 200434373 | ND |
| 2016-05-16 | SOC 200439620 | ND |
| 2016-05-16 | SOC 200439628 | ND |
| 2016-05-16 | SOC 200439627 | ND |
| 2016-05-16 | SOC 200439619 | ND |
| 2016-05-16 | SOC 200439623 | ND |
| 2016-05-16 | SOC 200439625 | ND |
| 2016-05-16 | SOC 200439626 | ND |
| 2016-05-16 | SOC 200439622 | ND |
| 2016-08-29 | SOC 200448465 | ND |
| 2016-08-29 | SOC 200448473 | ND |
| 2016-08-29 | SOC 200448472 | ND |
| 2016-08-29 | SOC 200448466 | ND |
| 2016-08-29 | SOC 200448468 | ND |
| 2016-08-29 | SOC 200448469 | ND |
| 2016-08-29 | SOC 200448470 | ND |
| 2016-08-29 | SOC 200448471 | ND |
| 2016-08-30 | SOC 200448554 | ND |
| 2016-09-28 | SOC 200451204 | ND |
| 2016-11-22 | SOC 200455270 | ND |
| 2017-02-27 | SOCR 200461303 | ND |
| 2017-02-27 | SOCR 200461318 | ND |
| 2017-02-27 | SOCR 200461319 | ND |
| 2017-06-22 | SOCR 200470146 | ND |
| 2018-03-05 | SOCR 200489131 | ND |
| 2018-03-05 | SOCR 200489130 | ND |
| 2018-03-05 | SOCR 200489152 | ND |
| 2018-11-29 | SOCR 200514127 | ND |
| 2019-03-04 | SOCR 200523153 | ND |
| 2019-03-04 | SOCR 200523178 | ND |
| 2019-03-04 | SOCR 200523152 | ND |
| 2019-03-04 | SOCR 200523177 | ND |
| 2019-05-08 | SOC 200531300 | ND |
| 2019-05-28 | SOC 200533659 | ND |
| 2019-05-28 | SOC 200533660 | ND |
| 2019-05-28 | SOC 200533804 | ND |
| 2019-05-28 | SOC 200533719 | ND |
| 2019-05-28 | SOC 200533720 | ND |
| 2019-05-28 | SOC 200533803 | ND |
| 2019-05-29 | SOC 200533881 | ND |
| 2019-05-29 | SOC 200533880 | ND |
| 2019-05-29 | SOC 200533867 | ND |
| 2019-05-29 | SOC 200533868 | ND |
| 2019-08-26 | SOC 200546200 | ND |
| 2019-08-26 | SOC 200546198 | ND |
| 2019-08-26 | SOC 200546197 | ND |
| 2019-08-27 | SOC 200546267 | ND |
| 2019-08-27 | SOC 200546268 | ND |
| 2019-08-27 | SOC 200546302 | ND |
| 2019-08-27 | SOC 200546303 | ND |
| 2019-08-28 | SOC 200546738 | ND |
| 2019-08-28 | SOC 200546737 | ND |
| 2019-08-28 | SOC 200546736 | ND |
| 2019-08-28 | SOC 200546553 | ND |