2,4,5-TP (Silvex)
Newellton 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 | 2 | 0 | ND |
2015 | ND | 4 | 0 | ND |
2016 | ND | 4 | 0 | ND |
2017 | ND | 4 | 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
Date | Lab ID | Result |
---|---|---|
2014-03-17 | AD89855 | ND |
2014-03-17 | AD89855 | ND |
2015-03-03 | 35177844005 | ND |
2015-03-03 | 35177844005 | ND |
2015-09-16 | 35207972016 | ND |
2015-09-16 | 35207972016 | ND |
2016-01-11 | 35224622004 | ND |
2016-01-11 | 35224622004 | ND |
2016-09-07 | 35264598001 | ND |
2016-09-07 | 35264598001 | ND |
2017-01-09 | 35288675005 | ND |
2017-01-09 | 35288675005 | ND |
2017-09-25 | 35338816006 | ND |
2017-09-25 | 35338816006 | ND |
2018-01-08 | 35367824001 | ND |
2018-01-08 | 35367824001 | ND |
2018-07-30 | 35407879001 | ND |
2018-07-30 | 35407879001 | ND |
2019-01-14 | 35442603002 | ND |
2019-01-14 | 35442603002 | ND |
2019-07-31 | 35486738001 | ND |
2019-07-31 | 35486738001 | ND |