2,4,5-TP (Silvex)
Bethlehem Water District No. 1
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 3 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | ND | 5 | 0 | ND |
| 2017 | ND | 3 | 0 | ND |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 3 | 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 |
|---|---|---|
| 2014-10-15 | JH1407377-SOC | ND |
| 2014-10-15 | JH1440736-SOC | ND |
| 2014-10-22 | JH1407553-SOCS | ND |
| 2016-04-19 | JH1602760-SOC | ND |
| 2016-04-25 | JH1604132-SOC | ND |
| 2016-04-25 | JH1602919-SOC | ND |
| 2016-04-25 | JH1602918-SOC | ND |
| 2016-05-10 | JH1603632-SOC | ND |
| 2017-10-18 | JH1708529.SOC | ND |
| 2017-10-18 | JH1708532.SOC | ND |
| 2017-10-18 | JH1708514.SOC | ND |
| 2019-04-02 | JH1901939.SOCS | ND |
| 2019-04-02 | JH1901942.SOC | ND |
| 2019-04-26 | JH1901940.SOC | ND |