2,4,5-TP (Silvex)
Bethel Water Department
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.
26
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 | 6 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 7 | 0 | ND |
| 2018 | ND | 5 | 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 |
|---|---|---|
| 2014-03-25 | 184982CH | ND |
| 2014-03-25 | 184981CH | ND |
| 2014-06-09 | 187419CH | ND |
| 2014-06-09 | 187420CH | ND |
| 2014-07-22 | 188804CH | ND |
| 2014-07-22 | 188805CH | ND |
| 2015-04-13 | 195727CH | ND |
| 2015-04-13 | 195728CH | ND |
| 2016-01-26 | 204627CH | ND |
| 2016-02-22 | 205492CH | ND |
| 2016-02-22 | 205493CH | ND |
| 2016-04-05 | 206678GE | ND |
| 2017-03-27 | 218426GE | ND |
| 2017-03-27 | 218427GE | ND |
| 2017-04-10 | 218934GE | ND |
| 2017-04-10 | 218933GE | ND |
| 2017-04-10 | 218936GE | ND |
| 2017-04-10 | 218935GE | ND |
| 2017-12-05 | 307526GE | ND |
| 2018-01-30 | 308987GE | ND |
| 2018-02-13 | 309370GE | ND |
| 2018-02-13 | 309371GE | ND |
| 2018-04-17 | 311174GE | ND |
| 2018-07-03 | 313820GE | ND |
| 2019-01-29 | 320477GE | ND |
| 2019-01-29 | 320488GE | ND |