2,4,5-TP (Silvex)
St Charles
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.
24
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 |
|---|---|---|---|---|
| 2014 | N/A | 0 | 0 | N/A |
| 2015 | ND | 12 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 9 | 0 | ND |
| 2019 | ND | 3 | 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 |
|---|---|---|
| 2015-08-18 | 1508E43-004C | ND |
| 2015-08-18 | 1508E43-007C | ND |
| 2015-08-18 | 1508E43-010C | ND |
| 2015-08-18 | 1508E43-013C | ND |
| 2015-08-18 | 1508E43-016C | ND |
| 2015-08-18 | 1508E43-001C | ND |
| 2015-11-17 | 1511D17-001C | ND |
| 2015-11-18 | 1511E63-001C | ND |
| 2015-11-18 | 1511E63-003C | ND |
| 2015-11-18 | 1511E63-005C | ND |
| 2015-11-18 | 1511E63-007C | ND |
| 2015-11-19 | 1511E82-001C | ND |
| 2018-08-09 | 8081943-05 | ND |
| 2018-08-09 | 8081943-04 | ND |
| 2018-08-09 | 8081943-01 | ND |
| 2018-10-30 | 8105673-01 | ND |
| 2018-10-30 | 8105673-03 | ND |
| 2018-10-30 | 8105673-05 | ND |
| 2018-10-30 | 8105673-07 | ND |
| 2018-10-30 | 8105673-09 | ND |
| 2018-11-05 | 8110572-01 | ND |
| 2019-09-04 | 9090566-05 | ND |
| 2019-09-04 | 9090566-03 | ND |
| 2019-09-04 | 9090566-01 | ND |