2,4,5-TP (Silvex)
Manchester 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.
37
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 | 8 | 0 | ND |
| 2015 | ND | 8 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 1 | 0 | ND |
| 2018 | ND | 8 | 0 | ND |
| 2019 | ND | 11 | 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 |
|---|---|---|
| 2014-01-13 | AA63858-SOCR | ND |
| 2014-05-05 | AA65105-SOC2 | ND |
| 2014-05-05 | AA65113-SOC2 | ND |
| 2014-05-05 | AA65112-SOC2 | ND |
| 2014-05-06 | AA65126-SOC2 | ND |
| 2014-05-06 | AA65127-SOC2 | ND |
| 2014-05-07 | AA65143-SOC2 | ND |
| 2014-05-07 | AA65144-SOC2 | ND |
| 2015-02-12 | AA68575-SOCR | ND |
| 2015-04-27 | AA69419-SOC2 | ND |
| 2015-04-27 | AA69420-SOC2 | ND |
| 2015-04-28 | AA69437-SOC2 | ND |
| 2015-04-28 | AA69438-SOC2 | ND |
| 2015-04-29 | AA69445-SOC2 | ND |
| 2015-04-29 | AA69452-SOC2 | ND |
| 2015-04-29 | AA69453-SOC2 | ND |
| 2016-01-14 | AA72868-SOCR | ND |
| 2017-02-17 | AA78198-SOCR | ND |
| 2018-02-23 | AA82899-SOCR | ND |
| 2018-06-13 | AA84270-SOC2 | ND |
| 2018-06-13 | AA84269-SOC2 | ND |
| 2018-06-26 | AA84433-SOC2 | ND |
| 2018-06-27 | AA84458-SOC2 | ND |
| 2018-06-27 | AA84459-SOC2 | ND |
| 2018-06-29 | AA84479-SOC2 | ND |
| 2018-06-29 | AA84480-SOC2 | ND |
| 2019-05-03 | AA88240-SOCR | ND |
| 2019-09-16 | AA89985-SOC2 | ND |
| 2019-09-16 | AA89989-SOC2 | ND |
| 2019-09-16 | AA90001-SOC2 | ND |
| 2019-09-16 | AA90001-SOC2 | ND |
| 2019-09-16 | AA89986-SOC2 | ND |
| 2019-09-16 | AA89986-SOC2 | ND |
| 2019-09-16 | AA90007-SOC2 | ND |
| 2019-09-17 | AA90002-SOC2 | ND |
| 2019-09-17 | AA89998-SOC2 | ND |
| 2019-09-17 | AA89998-SOC2 | ND |