2,4,5-TP (Silvex)
Shorewood
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.
20
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 | 9 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 8 | 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 |
|---|---|---|
| 2015-01-22 | 1501D20-004C | ND |
| 2015-01-22 | 1501D20-007C | ND |
| 2015-01-22 | 1501D20-010C | ND |
| 2015-01-22 | 1501D20-001C | ND |
| 2015-06-08 | 1506679-001C | ND |
| 2015-06-08 | 1506679-004C | ND |
| 2015-06-08 | 1506679-007C | ND |
| 2015-06-08 | 1506679-010C | ND |
| 2015-10-06 | 1510372-001C | ND |
| 2016-01-18 | 1601934-001C | ND |
| 2017-04-05 | 1704348-001C | ND |
| 2017-07-10 | 1707481-001C | ND |
| 2018-01-10 | 1801579-001C | ND |
| 2018-01-10 | 1801579-004C | ND |
| 2018-01-10 | 1801579-007C | ND |
| 2018-01-10 | 1801579-010C | ND |
| 2018-05-23 | 1805I62-001C | ND |
| 2018-05-23 | 1805I62-004C | ND |
| 2018-05-23 | 1805I62-007C | ND |
| 2018-05-23 | 1805I62-010C | ND |