2,4,5-TP (Silvex)
Ward II Water District
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 | 6 | 0 | ND |
2015 | ND | 20 | 0 | ND |
2016 | ND | 4 | 0 | ND |
2017 | ND | 6 | 0 | ND |
2018 | ND | 16 | 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 |
---|---|---|
2014-06-24 | AD92629 | ND |
2014-06-24 | AD92627 | ND |
2014-06-24 | AD92628 | ND |
2014-06-24 | AD92629 | ND |
2014-06-24 | AD92628 | ND |
2014-06-24 | AD92627 | ND |
2015-07-20 | 35198654001 | ND |
2015-07-20 | 35198654001 | ND |
2015-09-21 | 35208876004 | ND |
2015-09-21 | 35208876001 | ND |
2015-09-21 | 35208876002 | ND |
2015-09-21 | 35208876003 | ND |
2015-09-21 | 35208876004 | ND |
2015-09-21 | 35208876005 | ND |
2015-09-21 | 35208876003 | ND |
2015-09-21 | 35208876002 | ND |
2015-09-21 | 35208876001 | ND |
2015-09-21 | 35208876005 | ND |
2015-09-29 | 35209950003 | ND |
2015-09-29 | 35209950001 | ND |
2015-09-29 | 35209950002 | ND |
2015-09-29 | 35209950003 | ND |
2015-09-29 | 35209950004 | ND |
2015-09-29 | 35209950001 | ND |
2015-09-29 | 35209950002 | ND |
2015-09-29 | 35209950004 | ND |
2016-03-01 | 35232777001 | ND |
2016-03-01 | 35232777002 | ND |
2016-03-01 | 35232777002 | ND |
2016-03-01 | 35232777001 | ND |
2017-06-19 | 35320024003 | ND |
2017-06-19 | 35320024002 | ND |
2017-06-19 | 35320024001 | ND |
2017-06-19 | 35320024003 | ND |
2017-06-19 | 35320024002 | ND |
2017-06-19 | 35320024001 | ND |
2018-05-02 | 35390161001 | ND |
2018-05-02 | 35390161002 | ND |
2018-05-02 | 35390161001 | ND |
2018-05-02 | 35390161002 | ND |
2018-06-25 | 35400823005 | ND |
2018-06-25 | 35400823004 | ND |
2018-06-25 | 35400823003 | ND |
2018-06-25 | 35400823002 | ND |
2018-06-25 | 35400823001 | ND |
2018-06-25 | 35400823001 | ND |
2018-06-25 | 35400823002 | ND |
2018-06-25 | 35400823003 | ND |
2018-06-25 | 35400823004 | ND |
2018-06-25 | 35400823005 | ND |
2018-09-10 | 35417396001 | ND |
2018-09-10 | 35417396001 | ND |
2019-07-24 | 35485209001 | ND |
2019-07-24 | 35485209001 | ND |