2,4,5-TP (Silvex)
Eastern Municipal Water District
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.
19
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 | ND | 2 | 0 | ND |
| 2015 | ND | 6 | 0 | ND |
| 2016 | ND | 3 | 0 | ND |
| 2017 | ND | 3 | 0 | ND |
| 2018 | ND | 2 | 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 |
|---|---|---|
| 2014-08-18 | 4790-081-0850 | ND |
| 2014-08-18 | 4790-071-0900 | ND |
| 2015-04-16 | 4790-081-1100 | ND |
| 2015-04-20 | 4790-063-0825 | ND |
| 2015-04-20 | 4790-071-0853 | ND |
| 2015-08-04 | 4790-063-1015 | ND |
| 2015-08-04 | 4790-081-0820 | ND |
| 2015-08-04 | 4790-071-0830 | ND |
| 2016-08-01 | 4790-071-0835 | ND |
| 2016-08-01 | 4790-081-0830 | ND |
| 2016-08-02 | 4790-063-0840 | ND |
| 2017-08-01 | 4790-081-1126 | ND |
| 2017-08-01 | 4790-063-1030 | ND |
| 2017-08-02 | 4790-071-0815 | ND |
| 2018-07-02 | 4790-063-0856 | ND |
| 2018-07-02 | 4790-081-0814 | ND |
| 2019-06-18 | 4790-106-0930 | ND |
| 2019-07-08 | 4790-063-1515 | ND |
| 2019-07-11 | 4790-081-1418 | ND |