2,4,5-TP (Silvex)
USMC - 29 Palms
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.
18
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 | N/A | 0 | 0 | N/A |
| 2015 | ND | 7 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 11 | 0 | ND |
| 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 |
|---|---|---|
| 2015-01-26 | 4790-013-1140 | ND |
| 2015-01-26 | 4790-004-1330 | ND |
| 2015-01-26 | 4790-011-1450 | ND |
| 2015-01-26 | 4790-005-1200 | ND |
| 2015-01-26 | 4790-010-1245 | ND |
| 2015-01-26 | 4790-001-1100 | ND |
| 2015-03-02 | 4790-003-1100 | ND |
| 2018-02-27 | 4790-007-1320 | ND |
| 2018-02-27 | 4790-013-1120 | ND |
| 2018-02-27 | 4790-006-1255 | ND |
| 2018-02-27 | 4790-005-1200 | ND |
| 2018-02-27 | 4790-004-1230 | ND |
| 2018-02-27 | 4790-003-1100 | ND |
| 2018-02-27 | 4790-001-1140 | ND |
| 2018-02-28 | 4790-008-1145 | ND |
| 2018-02-28 | 4790-009-1200 | ND |
| 2018-02-28 | 4790-010-1100 | ND |
| 2018-02-28 | 4790-011-1130 | ND |