2,4,5-TP (Silvex)
Michigan City Department of Water Works
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.
13
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 | ND | 1 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 3 | 0 | ND |
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 4 | 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 |
|---|---|---|
| 2014-10-21 | 327831RS-1404 | ND |
| 2015-05-12 | 340040RS28-1502 | ND |
| 2015-08-11 | 346242RS28-1503 | ND |
| 2016-10-11 | 374866RS28-1604 | ND |
| 2017-06-20 | 391193RS28-1702 | ND |
| 2017-08-08 | 395084RS28-1703 | ND |
| 2017-11-14 | 402806RS28-1704 | ND |
| 2018-05-15 | 416680RS28-1802 | ND |
| 2018-08-14 | 426139RS28-1803 | ND |
| 2019-02-12 | 443133RS28-1901 | ND |
| 2019-05-14 | 19E076601RS28-19 | ND |
| 2019-08-13 | 461667RS28-1903 | ND |
| 2019-11-12 | 470828RS28-1904 | ND |