2,4,5-TP (Silvex)
Opp Utilities Board
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 | N/A | 0 | 0 | N/A |
2015 | N/A | 0 | 0 | N/A |
2016 | ND | 11 | 0 | ND |
2017 | N/A | 0 | 0 | N/A |
2018 | N/A | 0 | 0 | N/A |
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 |
---|---|---|
2016-05-31 | 37505312016-2 | ND |
2016-05-31 | 37505312016-3 | ND |
2016-05-31 | 37505312016-1 | ND |
2016-06-01 | 37505312016-4 | ND |
2016-06-01 | 37505312016-5 | ND |
2016-06-01 | 37505312016-6 | ND |
2016-09-06 | 37509062016-1 | ND |
2016-09-06 | 37509062016-4 | ND |
2016-09-06 | 37509062016-3 | ND |
2016-09-06 | 37509062016-2 | ND |
2016-09-06 | 37509062016-5 | ND |
2019-04-16 | 189530-01SOC | ND |
2019-04-16 | 189525-01SOC | ND |
2019-04-16 | 189526-01SOC | ND |
2019-04-16 | 189527-01SOC | ND |
2019-04-16 | 189524-01SOC | ND |
2019-04-16 | 189528-01SOC | ND |
2019-08-20 | 194268-01SOC | ND |
2019-08-20 | 194272-01SOC | ND |
2019-08-20 | 194271-01SOC | ND |
2019-08-20 | 194269-01SOC | ND |
2019-08-20 | 194267-01SOC | ND |