2,4,5-TP (Silvex)
Waialee-sunset Beach
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.
17
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 | 2 | 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 |
|---|---|---|
| 2014-02-19 | 201402210361 | ND |
| 2014-02-20 | 201402220088 | ND |
| 2014-07-21 | 201407230664 | ND |
| 2014-07-21 | 201407230666 | ND |
| 2014-10-31 | 201411040537 | ND |
| 2014-10-31 | 201411040538 | ND |
| 2014-11-12 | 201411140850 | ND |
| 2015-04-28 | 201504300075 | ND |
| 2016-07-05 | ND | |
| 2017-01-04 | ND | |
| 2017-02-23 | ND | |
| 2017-10-10 | ND | |
| 2017-10-31 | ND | |
| 2017-10-31 | ND | |
| 2018-04-25 | 201804300496 | ND |
| 2018-08-13 | 201808160452 | ND |
| 2019-02-19 | 201902210382 | ND |