2,4,5-TP (Silvex)
Global Water - Santa Cruz Water Company
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.
10
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | N/A | 0 | 0 | N/A |
| 2015 | ND | 2 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 5 | 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 |
|---|---|---|
| 2015-01-12 | 550-38232-1S | ND |
| 2015-10-21 | 550-53091-1S | ND |
| 2018-02-01 | 550-97234-1SOC | ND |
| 2018-07-23 | 550-106542-1 | ND |
| 2018-11-01 | 550-112696-1 SOC | ND |
| 2019-02-26 | 4211659 | ND |
| 2019-02-26 | 4211660 | ND |
| 2019-04-18 | 4267725 | ND |
| 2019-07-11 | 550-125915-2 SOC | ND |
| 2019-10-03 | 550-130768-2 SOC | ND |