2,4,5-TP (Silvex)
Wailuku
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.
50
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 | 22 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 22 | 0 | ND |
| 2018 | ND | 2 | 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 |
|---|---|---|
| 2014-02-21 | 201402260434 | ND |
| 2014-02-24 | 201402260728 | ND |
| 2014-02-24 | 201402260746 | ND |
| 2014-02-24 | 201402260878 | ND |
| 2014-02-24 | 201402260912 | ND |
| 2014-02-25 | 201402280114 | ND |
| 2014-02-25 | 201402280305 | ND |
| 2014-03-19 | 201403210381 | ND |
| 2014-03-19 | 201403210383 | ND |
| 2014-03-19 | 201403210385 | ND |
| 2014-03-27 | 201403290120 | ND |
| 2014-04-30 | 201405020231 | ND |
| 2014-04-30 | 201405020320 | ND |
| 2014-04-30 | 201405020233 | ND |
| 2014-04-30 | 201405020232 | ND |
| 2014-04-30 | 201405020230 | ND |
| 2014-04-30 | 201405020229 | ND |
| 2014-04-30 | 201405020228 | ND |
| 2014-04-30 | 201405020227 | ND |
| 2014-05-01 | 201405030098 | ND |
| 2014-05-01 | 201405050005 | ND |
| 2014-05-21 | 201405230324 | ND |
| 2015-06-03 | 201506050453 | ND |
| 2015-09-08 | 201509100855 | ND |
| 2016-09-12 | ND | |
| 2016-11-30 | ND | |
| 2017-01-31 | ND | |
| 2017-01-31 | ND | |
| 2017-01-31 | ND | |
| 2017-02-24 | ND | |
| 2017-02-24 | ND | |
| 2017-02-27 | ND | |
| 2017-02-27 | ND | |
| 2017-02-27 | ND | |
| 2017-05-19 | ND | |
| 2017-05-19 | ND | |
| 2017-08-30 | ND | |
| 2017-09-07 | ND | |
| 2017-09-07 | ND | |
| 2017-09-14 | ND | |
| 2017-09-14 | ND | |
| 2017-09-14 | ND | |
| 2017-09-14 | ND | |
| 2017-09-14 | ND | |
| 2017-09-14 | ND | |
| 2017-09-21 | ND | |
| 2017-10-25 | ND | |
| 2017-12-06 | ND | |
| 2018-01-30 | 201801030999 | ND |
| 2018-05-17 | 201805180453 | ND |