2,4,5-TP (Silvex)
Bell Arthur Water Corporation
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.
20
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 | 8 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 8 | 0 | ND |
| 2018 | N/A | 0 | 0 | N/A |
| 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 |
|---|---|---|
| 2014-02-27 | 8031-022714-E07S | ND |
| 2014-05-13 | 8031-051314-E06S | ND |
| 2014-05-13 | 8031-051314-E07S | ND |
| 2014-05-14 | 8031-051414-E04S | ND |
| 2014-05-14 | 8031-051414-E05S | ND |
| 2014-07-08 | 8031-070814-E04S | ND |
| 2014-07-08 | 8031-070814-E06S | ND |
| 2014-07-09 | 8031-070914-E05S | ND |
| 2016-08-29 | 8031-082916-E03S | ND |
| 2016-12-14 | 8031-121416-E03S | ND |
| 2017-01-24 | 8031-012417-E07S | ND |
| 2017-05-01 | 8031-050117-E04S | ND |
| 2017-05-01 | 8031-050117-E06S | ND |
| 2017-05-02 | 8031-050217-E05S | ND |
| 2017-05-02 | 8031-050217-E07S | ND |
| 2017-08-23 | 8031-082317-E04S | ND |
| 2017-08-23 | 8031-082317-E05S | ND |
| 2017-08-23 | 8031-082317-E06S | ND |
| 2019-08-19 | 8031-081919-E03S | ND |
| 2019-10-21 | 8031-102119-E03S | ND |