2,4,5-TP (Silvex)
Westwego Waterworks
NOTE: Westwego Waterworks purchases water from West Jefferson Waterworks District 2 which is required to test for 2,4,5-tp (silvex). Sample information shown below was taken by West Jefferson Waterworks District 2.
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 | 4 | 0 | ND |
2016 | ND | 4 | 0 | ND |
2017 | ND | 2 | 0 | ND |
2018 | ND | 4 | 0 | ND |
2019 | ND | 4 | 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
NOTE: Westwego Waterworks purchases water from West Jefferson Waterworks District 2 which is required to test for 2,4,5-tp (silvex). Sample information shown below was taken by West Jefferson Waterworks District 2.
Date | Lab ID | Result |
---|---|---|
2014-02-04 | AD88742 | ND |
2014-02-04 | AD88742 | ND |
2015-03-16 | 35179807004 | ND |
2015-03-16 | 35179807004 | ND |
2015-10-14 | 35212328003 | ND |
2015-10-14 | 35212328003 | ND |
2016-01-27 | 35226999004 | ND |
2016-01-27 | 35226999004 | ND |
2016-12-13 | 35283615001 | ND |
2016-12-13 | 35283615001 | ND |
2017-02-22 | 35296827004 | ND |
2017-02-22 | 35296827004 | ND |
2018-01-30 | 35371297004 | ND |
2018-01-30 | 35371297004 | ND |
2018-10-02 | 35421760001 | ND |
2018-10-02 | 35421760001 | ND |
2019-02-05 | 35446731001 | ND |
2019-02-05 | 35446731001 | ND |
2019-08-14 | 35490415001 | ND |
2019-08-14 | 35490415001 | ND |