2,4,5-TP (Silvex)
South Gate Water Department
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.
25
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 | 11 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 12 | 0 | ND |
| 2019 | ND | 1 | 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 |
|---|---|---|
| 2015-04-09 | 9588-016-1324 | ND |
| 2015-04-09 | 9588-007-1124 | ND |
| 2015-04-09 | 9588-008-1143 | ND |
| 2015-04-09 | 9588-024-1344 | ND |
| 2015-07-09 | 9588-007-1235 | ND |
| 2015-07-09 | 9588-016-1130 | ND |
| 2015-07-09 | 9588-024-1015 | ND |
| 2015-07-09 | 9588-008-1210 | ND |
| 2015-09-17 | 9588-009-0954 | ND |
| 2015-10-08 | 9588-014-1236 | ND |
| 2015-12-29 | 9588-009-0929 | ND |
| 2016-01-14 | 9588-014-1217 | ND |
| 2018-04-25 | 9588-024-1138 | ND |
| 2018-04-25 | 9588-008-1020 | ND |
| 2018-04-25 | 9588-016-1110 | ND |
| 2018-04-25 | 9588-007-1004 | ND |
| 2018-07-23 | 9588-016-0950 | ND |
| 2018-07-23 | 9588-024-0912 | ND |
| 2018-07-23 | 9588-014-1107 | ND |
| 2018-07-23 | 9588-009-1045 | ND |
| 2018-07-23 | 9588-008-1030 | ND |
| 2018-07-23 | 9588-007-1015 | ND |
| 2018-10-17 | 9588-014-1028 | ND |
| 2018-10-17 | 9588-009-1005 | ND |
| 2019-11-20 | 9588-008-1045 | ND |