2,4,5-TP (Silvex)
Bristol 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.
14
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 | 1 | 0 | ND |
| 2015 | ND | 1 | 0 | ND |
| 2016 | ND | 4 | 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 |
|---|---|---|
| 2014-03-04 | E403273-1SOC | ND |
| 2015-04-08 | E504835-1SOC | ND |
| 2016-07-08 | E607770-1SOC | ND |
| 2016-10-07 | E610937-1SOC | ND |
| 2016-10-07 | E610937-2SOC | ND |
| 2016-12-08 | E612972-1SOC | ND |
| 2017-04-12 | D7D0843-01SOCR | ND |
| 2017-04-12 | D7D0843-02SOCR | ND |
| 2017-04-12 | D7D0843-03SOCR | ND |
| 2017-04-12 | D7D0843-04SOCR | ND |
| 2017-10-05 | D7J0547-01SOCR | ND |
| 2018-04-05 | D8D0436-01SOCR | ND |
| 2018-07-09 | D8G0647-01SOC | ND |
| 2019-03-27 | D9C2625-01SOCR | ND |