2,4,5-TP (Silvex)
Bethany Bay Ocean View
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.
19
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 | N/A | 0 | 0 | N/A |
| 2015 | ND | 9 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 6 | 0 | ND |
| 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 |
|---|---|---|
| 2015-04-22 | 35185735004 | ND |
| 2015-04-22 | 35185728002 | ND |
| 2015-04-23 | 35185746003 | ND |
| 2015-06-03 | 35191896006 | ND |
| 2015-07-28 | 35199879004 | ND |
| 2015-07-28 | 35199877004 | ND |
| 2015-07-28 | 35199876003 | ND |
| 2015-08-21 | 35204422003 | ND |
| 2015-10-26 | 35214322001 | ND |
| 2016-01-26 | 35227012001 | ND |
| 2016-09-26 | 35267825001 | ND |
| 2018-04-17 | 2309734004 | ND |
| 2018-04-25 | 2311953003 | ND |
| 2018-05-30 | 2318334003 | ND |
| 2018-08-01 | 2330455004 | ND |
| 2018-08-01 | 2330453004 | ND |
| 2018-08-02 | 2330461004 | ND |
| 2019-05-28 | 4311344 | ND |
| 2019-08-07 | 4384274 | ND |