2,4,5-TP (Silvex)
Ossining 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.
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 | 2 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 4 | 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 |
|---|---|---|
| 2014-06-05 | 35141073001SOC | ND |
| 2014-06-05 | 35141073002SOC | ND |
| 2016-01-07 | 3522449800SOCS | ND |
| 2016-01-07 | 35224498002 | ND |
| 2017-04-03 | 420-118816-1SOC | ND |
| 2017-11-06 | 420-128789-8SOC | ND |
| 2018-04-02 | 7047164002SOCS | ND |
| 2018-04-02 | 420-134806-1SOCS | ND |
| 2018-04-02 | 420-134806-2SOCS | ND |
| 2018-04-02 | 7047164001SOCS | ND |
| 2019-04-02 | 420-151609-2SOCS | ND |
| 2019-04-02 | 420-151609-1SOCS | ND |
| 2019-11-12 | AV23851SOCS | ND |