2,4,5-TP (Silvex)
Columbiana Water Works
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 | ND | 9 | 0 | ND |
2015 | N/A | 0 | 0 | N/A |
2016 | N/A | 0 | 0 | N/A |
2017 | ND | 10 | 0 | ND |
2018 | N/A | 0 | 0 | N/A |
2019 | N/A | 0 | 0 | N/A |
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 |
---|---|---|
2014-04-28 | 1404-00403-1 | ND |
2014-04-28 | 1404-00403-5 | ND |
2014-04-28 | 1404-00403-4 | ND |
2014-04-28 | 1404-00403-3 | ND |
2014-04-28 | 1404-00403-2 | ND |
2014-10-29 | 1410-00377-9 | ND |
2014-10-29 | 1410-00377-7 | ND |
2014-10-29 | 1410-00377-3 | ND |
2014-10-29 | 1410-00377-1 | ND |
2017-04-24 | 1704-00370-2 | ND |
2017-04-24 | 1704-00370-3 | ND |
2017-04-24 | 1704-00370-5 | ND |
2017-04-24 | 1704-00370-4 | ND |
2017-04-24 | 1704-00370-1 | ND |
2017-10-23 | 1710-003555-2 | ND |
2017-10-23 | 1710-003555-1 | ND |
2017-10-23 | 1710-003555-3 | ND |
2017-10-23 | 1710-003555-5 | ND |
2017-10-23 | 1710-003555-4 | ND |