2,4,5-TP (Silvex)
City of Columbia
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 | ND | 2 | 0 | ND |
2016 | ND | 2 | 0 | ND |
2017 | ND | 2 | 0 | ND |
2018 | ND | 2 | 0 | ND |
2019 | ND | 2 | 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 |
---|---|---|
2014-01-15 | AD34535 | ND |
2014-01-15 | AD34536 | ND |
2015-01-15 | AD50347 | ND |
2015-01-15 | AD50348 | ND |
2016-03-21 | AD72840 | ND |
2016-03-21 | AD72841 | ND |
2017-03-07 | AD90717 | ND |
2017-03-07 | AD90715 | ND |
2018-03-12 | AE09073 | ND |
2018-07-16 | AE15003 | ND |
2019-01-08 | AE23570 | ND |
2019-07-16 | AE33661 | ND |