2,4,5-TP (Silvex)
City of White Settlement
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.
16
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 | 7 | 0 | ND |
| 2015 | ND | 1 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 5 | 0 | ND |
| 2018 | ND | 1 | 0 | ND |
| 2019 | ND | 1 | 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 |
|---|---|---|
| 2014-02-05 | Q1403673010 | ND |
| 2014-02-05 | Q1403673011 | ND |
| 2014-02-05 | Q1403673024 | ND |
| 2014-02-05 | Q1403673012 | ND |
| 2014-02-05 | Q1403673013 | ND |
| 2014-04-22 | Q1412966016 | ND |
| 2014-09-29 | Q1448993001 | ND |
| 2015-01-26 | Q1502775024 | ND |
| 2016-01-25 | Q1603160012 | ND |
| 2017-01-19 | Q1702494013 | ND |
| 2017-01-19 | Q1702494014 | ND |
| 2017-05-03 | Q1718317012 | ND |
| 2017-05-03 | Q1718317013 | ND |
| 2017-08-02 | Q1732337005 | ND |
| 2018-06-18 | Q1824013001 | ND |
| 2019-01-31 | Q1904741006 | ND |