2,4,5-TP (Silvex)
Valley of The Moon Water District
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 |
---|---|---|---|---|
2014 | ND | 2 | 0 | ND |
2015 | N/A | 0 | 0 | N/A |
2016 | ND | 3 | 0 | ND |
2017 | ND | 2 | 0 | ND |
2018 | ND | 2 | 0 | ND |
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 |
---|---|---|
2014-02-12 | 5810-002-0857 | ND |
2014-02-12 | 5810-004-0927 | ND |
2016-02-19 | 5810-001-0918 | ND |
2016-02-19 | 5810-003-0753 | ND |
2016-02-19 | 5810-005-1036 | ND |
2017-02-15 | 5810-002-0800 | ND |
2017-02-15 | 5810-004-0920 | ND |
2018-01-11 | 5810-019-1232 | ND |
2018-01-11 | 5810-024-1232 | ND |
2019-03-25 | 5810-001-1015 | ND |
2019-03-25 | 5810-003-1050 | ND |
2019-03-25 | 5810-005-0950 | ND |