2,4,5-TP (Silvex)
Salem 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.
12
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 | 2 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 2 | 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 |
|---|---|---|
| 2014-02-19 | 1402-00361-001 | ND |
| 2014-07-22 | 1407-00659-001 | ND |
| 2015-03-09 | 1503-00537-001 | ND |
| 2015-08-18 | 1508-01553-001 | ND |
| 2016-03-07 | 1603-00675-001 | ND |
| 2016-07-07 | 1607-00565-001 | ND |
| 2017-02-22 | 1702-01615-001 | ND |
| 2017-07-18 | 1707-02046-001 | ND |
| 2018-02-15 | 1802-01346-001 | ND |
| 2018-07-02 | 1807-00230-001 | ND |
| 2019-02-07 | 1902-00603-001 | ND |
| 2019-07-11 | 1907-01500-001 | ND |