2,4,5-TP (Silvex)
City of Chino
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 |
|---|---|---|---|---|
| 2014 | ND | 2 | 0 | ND |
| 2015 | ND | 6 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 4 | 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 |
|---|---|---|
| 2014-01-21 | 9590-008-0720 | ND |
| 2014-01-21 | 9590-012-0935 | ND |
| 2015-08-25 | 9590-004-0720 | ND |
| 2015-08-25 | 9590-009-0900 | ND |
| 2015-08-25 | 9590-010-0740 | ND |
| 2015-08-25 | 9590-011-0930 | ND |
| 2015-08-25 | 9590-012-0900 | ND |
| 2015-08-25 | 9590-019-1100 | ND |
| 2018-07-17 | 9588-008-0920 | ND |
| 2018-07-17 | 9588-012-0815 | ND |
| 2018-07-31 | 9588-019-0705 | ND |
| 2018-11-27 | 9588-004-0840 | ND |