2,4,5-TP (Silvex)
Norman
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.
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 | N/A | 0 | 0 | N/A |
2017 | N/A | 0 | 0 | N/A |
2018 | ND | 108 | 0 | ND |
2019 | ND | 55 | 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 |
---|---|---|
2018-01-03 | 3847202 | ND |
2018-01-03 | 3847249 | ND |
2018-01-03 | 3847258 | ND |
2018-01-03 | 3847267 | ND |
2018-01-03 | 3847276 | ND |
2018-01-09 | 3850191 | ND |
2018-01-09 | 3850201 | ND |
2018-01-09 | 3850215 | ND |
2018-01-16 | 3853820 | ND |
2018-01-16 | 3853829 | ND |
2018-01-16 | 3853850 | ND |
2018-01-16 | 3853860 | ND |
2018-01-16 | 3853894 | ND |
2018-01-22 | 3856685 | ND |
2018-01-22 | 3856737 | ND |
2018-01-22 | 3856753 | ND |
2018-01-24 | 3858391 | ND |
2018-01-29 | 3860646 | ND |
2018-01-29 | 3860688 | ND |
2018-01-29 | 3860697 | ND |
2018-01-30 | 3861542 | ND |
2018-02-07 | 3867319 | ND |
2018-02-07 | 3867328 | ND |
2018-02-07 | 3867379 | ND |
2018-02-14 | 3872974 | ND |
2018-02-15 | 3873623 | ND |
2018-02-22 | 3878273 | ND |
2018-04-02 | 3902018 | ND |
2018-04-02 | 3902031 | ND |
2018-04-03 | 3903124 | ND |
2018-04-03 | 3903133 | ND |
2018-04-05 | 3905303 | ND |
2018-04-05 | 3905314 | ND |
2018-04-05 | 3905325 | ND |
2018-04-09 | 3907187 | ND |
2018-04-16 | 3913527 | ND |
2018-04-16 | 3913536 | ND |
2018-04-18 | 3915866 | ND |
2018-04-18 | 3915904 | ND |
2018-04-18 | 3915914 | ND |
2018-04-26 | 3922066 | ND |
2018-04-26 | 3922075 | ND |
2018-04-26 | 3922084 | ND |
2018-04-26 | 3922093 | ND |
2018-04-30 | 3924220 | ND |
2018-05-07 | 3930012 | ND |
2018-05-07 | 3930040 | ND |
2018-05-07 | 3930052 | ND |
2018-05-07 | 3930080 | ND |
2018-05-09 | 3933226 | ND |
2018-05-09 | 3933734 | ND |
2018-05-21 | 3942187 | ND |
2018-05-21 | 3942196 | ND |
2018-05-30 | 3949657 | ND |
2018-07-02 | 3977710 | ND |
2018-07-02 | 3978097 | ND |
2018-07-02 | 3979187 | ND |
2018-07-02 | 3980872 | ND |
2018-07-04 | 3980830 | ND |
2018-07-04 | 3980880 | ND |
2018-07-10 | 3984437 | ND |
2018-07-10 | 3984488 | ND |
2018-07-10 | 3984501 | ND |
2018-07-18 | 3993074 | ND |
2018-07-18 | 3993094 | ND |
2018-07-18 | 3993118 | ND |
2018-07-18 | 3993131 | ND |
2018-07-18 | 3995135 | ND |
2018-07-25 | 4001414 | ND |
2018-07-25 | 4001429 | ND |
2018-07-25 | 4001453 | ND |
2018-07-31 | 4006900 | ND |
2018-07-31 | 4006949 | ND |
2018-07-31 | 4007064 | ND |
2018-07-31 | 4007072 | ND |
2018-08-08 | 4016223 | ND |
2018-08-08 | 4016295 | ND |
2018-08-13 | 4020958 | ND |
2018-08-20 | 4029317 | ND |
2018-08-27 | 4036915 | ND |
2018-08-27 | 4036957 | ND |
2018-10-15 | 4089673 | ND |
2018-10-15 | 4089699 | ND |
2018-10-15 | 4089776 | ND |
2018-10-15 | 4090910 | ND |
2018-10-15 | 4090924 | ND |
2018-10-17 | 4092781 | ND |
2018-10-17 | 4092790 | ND |
2018-10-18 | 4095075 | ND |
2018-10-18 | 4095084 | ND |
2018-10-18 | 4095101 | ND |
2018-10-18 | 4095110 | ND |
2018-10-18 | 4095118 | ND |
2018-10-22 | 4099176 | ND |
2018-10-22 | 4099185 | ND |
2018-10-22 | 4099202 | ND |
2018-10-23 | 4099312 | ND |
2018-10-23 | 4099321 | ND |
2018-10-23 | 4099330 | ND |
2018-10-23 | 4099339 | ND |
2018-10-23 | 4099541 | ND |
2018-10-24 | 4100848 | ND |
2018-10-29 | 4104472 | ND |
2018-10-29 | 4104490 | ND |
2018-10-29 | 4104499 | ND |
2018-10-30 | 4105901 | ND |
2018-12-17 | 4152931 | ND |
2018-12-18 | 4154368 | ND |
2019-02-13 | 4197749 | ND |
2019-02-13 | 4197834 | ND |
2019-03-13 | 4226383 | ND |
2019-04-02 | 4246268 | ND |
2019-04-02 | 4246277 | ND |
2019-04-02 | 4246318 | ND |
2019-04-02 | 4246327 | ND |
2019-04-03 | 4247837 | ND |
2019-04-03 | 4247853 | ND |
2019-04-03 | 4247875 | ND |
2019-04-04 | 4249690 | ND |
2019-04-08 | 4253357 | ND |
2019-04-08 | 4253366 | ND |
2019-04-08 | 4253375 | ND |
2019-04-09 | 4254450 | ND |
2019-04-09 | 4254694 | ND |
2019-04-09 | 4254703 | ND |
2019-04-10 | 4256579 | ND |
2019-04-10 | 4256592 | ND |
2019-04-10 | 4256603 | ND |
2019-04-10 | 4256614 | ND |
2019-04-17 | 4264158 | ND |
2019-04-18 | 4266093 | ND |
2019-04-29 | 4276344 | ND |
2019-05-02 | 4280983 | ND |
2019-05-02 | 4280984 | ND |
2019-05-09 | 4289498 | ND |
2019-07-29 | 4368516 | ND |
2019-08-15 | 4388904 | ND |
2019-09-11 | 4417905 | ND |
2019-10-10 | 4452602 | ND |
2019-10-10 | 4452613 | ND |
2019-10-10 | 4452626 | ND |
2019-10-15 | 4458267 | ND |
2019-10-15 | 4458276 | ND |
2019-10-15 | 4458326 | ND |
2019-10-15 | 4458336 | ND |
2019-10-15 | 4458444 | ND |
2019-10-17 | 4460162 | ND |
2019-11-06 | 4478560 | ND |
2019-11-06 | 4478671 | ND |
2019-11-06 | 4478695 | ND |
2019-11-18 | 4489490 | ND |
2019-11-18 | 4489499 | ND |
2019-11-21 | 4494833 | ND |
2019-11-21 | 4495317 | ND |
2019-12-05 | 4505840 | ND |
2019-12-05 | 4505850 | ND |
2019-12-10 | 4510444 | ND |
2019-12-10 | 4510453 | ND |
2019-12-10 | 4510470 | ND |
2019-12-10 | 4510523 | ND |
2019-12-10 | 4518239 | ND |
2019-12-17 | 4517947 | ND |
2019-12-20 | 4522411 | ND |