2,4,5-TP (Silvex)
Mission Springs WD
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.
30
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 | 20 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | ND | 10 | 0 | ND |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
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 |
|---|---|---|
| 2014-02-04 | 3761-014-0830 | ND |
| 2014-02-04 | 3761-026-0920 | ND |
| 2014-02-04 | 3761-025-0950 | ND |
| 2014-02-04 | 3761-008-0750 | ND |
| 2014-02-04 | 3761-011-1048 | ND |
| 2014-02-11 | 3761-030-0910 | ND |
| 2014-02-11 | 3761-013-1015 | ND |
| 2014-02-11 | 3761-017-0950 | ND |
| 2014-02-11 | 3761-015-0830 | ND |
| 2014-02-11 | 3761-010-0730 | ND |
| 2014-07-07 | 3761-026-0825 | ND |
| 2014-07-07 | 3761-014-0911 | ND |
| 2014-07-08 | 3761-015-0849 | ND |
| 2014-07-08 | 3761-010-0747 | ND |
| 2014-07-08 | 3761-008-0817 | ND |
| 2014-07-08 | 3761-030-0922 | ND |
| 2014-07-09 | 3761-011-1203 | ND |
| 2014-07-09 | 3761-017-1051 | ND |
| 2014-07-09 | 3761-025-1118 | ND |
| 2014-07-09 | 3761-013-1035 | ND |
| 2017-06-01 | 3761-015-1246 | ND |
| 2017-06-01 | 3761-013-1108 | ND |
| 2017-06-05 | 3761-026-1200 | ND |
| 2017-06-05 | 3761-014-1130 | ND |
| 2017-06-06 | 3761-025-1300 | ND |
| 2017-06-06 | 3761-017-1100 | ND |
| 2017-06-06 | 3761-011-1200 | ND |
| 2017-06-06 | 3761-010-0945 | ND |
| 2017-06-07 | 3761-008-1124 | ND |
| 2017-06-07 | 3761-030-1200 | ND |