2,4,5-TP (Silvex)
Enid
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | N/A | 0 | 0 | N/A |
2015 | N/A | 0 | 0 | N/A |
2016 | N/A | 0 | 0 | N/A |
2017 | N/A | 0 | 0 | N/A |
2018 | ND | 8 | 0 | ND |
2019 | ND | 8 | 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 |
---|---|---|
2018-02-14 | AB14024-01 | ND |
2018-02-14 | AB14024-02 | ND |
2018-04-17 | AD18001-01 | ND |
2018-04-17 | AD18001-02 | ND |
2018-08-14 | AH15016-01 | ND |
2018-08-14 | AH15016-02 | ND |
2018-10-23 | AJ23072-01 | ND |
2018-10-23 | AJ23072-02RE1 | ND |
2019-02-05 | SDWA-1341043-00 | ND |
2019-02-05 | SDWA-1341044-00 | ND |
2019-05-14 | SDWA-1367935-00 | ND |
2019-05-14 | SDWA-1367936-00 | ND |
2019-08-13 | SDWA-1404330-00 | ND |
2019-08-13 | SDWA-1404331-00 | ND |
2019-11-21 | SDWA-1442377-00 | ND |
2019-11-21 | SDWA-1442378-00 | ND |