2,4,5-TP (Silvex)
Camp Pendleton (South)
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.
63
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 | 7 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 5 | 0 | ND |
| 2017 | ND | 7 | 0 | ND |
| 2018 | ND | 27 | 0 | ND |
| 2019 | ND | 13 | 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 |
|---|---|---|
| 2014-03-13 | 9590-044-1126 | ND |
| 2014-03-13 | 9590-043-1045 | ND |
| 2014-03-25 | 9590-037-1205 | ND |
| 2014-06-11 | 9590-043-1140 | ND |
| 2014-06-12 | 9590-044-1220 | ND |
| 2014-08-21 | 9590-043-1155 | ND |
| 2014-11-05 | 9590-044-1245 | ND |
| 2015-01-26 | 9590-044-1136 | ND |
| 2015-05-20 | 9590-044-1035 | ND |
| 2015-08-24 | 9590-051-1230 | ND |
| 2015-11-16 | 9590-051-1030 | ND |
| 2016-02-11 | 9590-051-1130 | ND |
| 2016-04-28 | 9590-044-1102 | ND |
| 2016-05-05 | 9590-051-1045 | ND |
| 2016-07-28 | 9590-044-1145 | ND |
| 2016-10-27 | 9590-044-1120 | ND |
| 2017-01-25 | 9590-044-1300 | ND |
| 2017-05-10 | 9590-039-1215 | ND |
| 2017-05-11 | 9590-030-1245 | ND |
| 2017-11-17 | 9590-039-1230 | ND |
| 2017-11-17 | 9590-032-1045 | ND |
| 2017-12-04 | 9590-030-1245 | ND |
| 2017-12-28 | 9590-049-1110 | ND |
| 2018-02-08 | 9590-014-1235 | ND |
| 2018-02-12 | 9590-036-1335 | ND |
| 2018-02-14 | 9590-018-0740 | ND |
| 2018-03-14 | 9590-051-1242 | ND |
| 2018-03-16 | 9590-020-1110 | ND |
| 2018-03-19 | 9590-035-1200 | ND |
| 2018-03-21 | 9590-034-1245 | ND |
| 2018-03-22 | 9590-043-1125 | ND |
| 2018-03-22 | 9590-044-1020 | ND |
| 2018-03-26 | 9590-022-1340 | ND |
| 2018-03-29 | 9590-037-1302 | ND |
| 2018-03-29 | 9590-019-1225 | ND |
| 2018-04-24 | 9590-039-1220 | ND |
| 2018-04-25 | 9590-030-1300 | ND |
| 2018-05-01 | 9590-049-1300 | ND |
| 2018-05-16 | 9590-032-1230 | ND |
| 2018-08-16 | 9590-014-1032 | ND |
| 2018-08-16 | 9590-036-1100 | ND |
| 2018-08-24 | 9590-018-0725 | ND |
| 2018-09-19 | 9590-035-1102 | ND |
| 2018-09-19 | 9590-043-1205 | ND |
| 2018-09-19 | 9590-044-1150 | ND |
| 2018-09-19 | 9590-020-1055 | ND |
| 2018-09-20 | 9590-034-1202 | ND |
| 2018-09-20 | 9590-051-1125 | ND |
| 2018-09-24 | 9590-037-1145 | ND |
| 2018-09-24 | 9590-019-1215 | ND |
| 2019-01-30 | 9590-020-1052 | ND |
| 2019-01-31 | 9590-034-1100 | ND |
| 2019-02-21 | 9590-014-1320 | ND |
| 2019-02-28 | 9590-051-1042 | ND |
| 2019-03-01 | 9590-035-1102 | ND |
| 2019-03-15 | 9590-044-1120 | ND |
| 2019-03-15 | 9590-043-1035 | ND |
| 2019-03-21 | 9590-037-1100 | ND |
| 2019-03-21 | 9590-019-1136 | ND |
| 2019-05-07 | 9590-049-1025 | ND |
| 2019-05-07 | 9590-032-0835 | ND |
| 2019-05-08 | 9590-039-1215 | ND |
| 2019-05-09 | 9590-030-1100 | ND |