2,4,5-TP (Silvex)
Amarillo Municipal Water System
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 | 3 | 0 | ND |
2015 | ND | 2 | 0 | ND |
2016 | ND | 4 | 0 | ND |
2017 | ND | 3 | 0 | ND |
2018 | ND | 1 | 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 |
---|---|---|
2014-05-21 | Q1417171010 | ND |
2014-05-21 | Q1417423006 | ND |
2014-05-21 | Q1417423007 | ND |
2015-02-25 | Q1507408007 | ND |
2015-11-17 | Q1545289016 | ND |
2016-02-22 | Q1607546026 | ND |
2016-02-22 | Q1607546002 | ND |
2016-04-19 | Q1615677014 | ND |
2016-09-27 | Q1640717017 | ND |
2017-02-07 | Q1705187012 | ND |
2017-05-02 | Q1717903011 | ND |
2017-09-05 | Q1741028012 | ND |
2018-02-13 | Q1805778011 | ND |
2019-01-24 | Q1903570002 | ND |
2019-05-02 | Q1918377008 | ND |