2,4,5-TP (Silvex)
Metropolitan District Commission
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.
37
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 | 4 | 0 | ND |
| 2015 | ND | 10 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 4 | 0 | ND |
| 2018 | ND | 11 | 0 | ND |
| 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 |
|---|---|---|
| 2014-06-25 | SOCR 200398586 | ND |
| 2014-06-25 | SOCR 200398587 | ND |
| 2014-06-25 | SOCR 200398588 | ND |
| 2014-06-25 | SOCR 200398585 | ND |
| 2015-07-16 | SOCR 200420506 | ND |
| 2015-07-16 | SOCR 200420502 | ND |
| 2015-07-16 | SOCR 200420501 | ND |
| 2015-07-30 | BJ65998SOC2 | ND |
| 2015-07-30 | BJ65997SOC2 | ND |
| 2015-07-30 | BJ65999SOC2 | ND |
| 2015-08-12 | SOCR 200422652 | ND |
| 2015-10-22 | BK12467SOC2 | ND |
| 2015-10-22 | BK12468SOC2 | ND |
| 2015-10-22 | BK12469SOC2 | ND |
| 2016-07-13 | SOCR 200444754 | ND |
| 2016-07-13 | SOCR 200444756 | ND |
| 2016-07-13 | SOCR 200444757 | ND |
| 2016-07-13 | SOCR 200444758 | ND |
| 2017-08-14 | SOCR 200474392 | ND |
| 2017-08-14 | SOCR 200474395 | ND |
| 2017-08-14 | SOCR 200474393 | ND |
| 2017-08-14 | SOCR 200474394 | ND |
| 2018-06-27 | CA79475 | ND |
| 2018-06-27 | CA79476 | ND |
| 2018-06-27 | CA79477 | ND |
| 2018-07-18 | SOCR 200500125 | ND |
| 2018-07-18 | SOCR 200500126 | ND |
| 2018-07-18 | SOCR 200500122 | ND |
| 2018-07-18 | SOCR 200500124 | ND |
| 2018-09-25 | CB38504 | ND |
| 2018-09-25 | CB38505R | ND |
| 2018-09-25 | CB38869 | ND |
| 2018-09-25 | CB38505 | ND |
| 2019-07-08 | SOCR 200539197 | ND |
| 2019-07-08 | SOCR 200539198 | ND |
| 2019-07-08 | SOCR 200539199 | ND |
| 2019-07-08 | SOCR 200539200 | ND |