2,4,5-TP (Silvex)
Cucamonga Valley 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 | 8 | 0 | ND |
2015 | ND | 5 | 0 | ND |
2016 | ND | 2 | 0 | ND |
2017 | ND | 1 | 0 | ND |
2018 | N/A | 0 | 0 | N/A |
2019 | ND | 1 | 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 |
---|---|---|
2014-02-27 | 3761-038-1255 | ND |
2014-05-29 | 3761-033-0940 | ND |
2014-06-05 | 3761-027-1045 | ND |
2014-08-05 | 3761-055-1150 | ND |
2014-08-18 | 3761-033-1050 | ND |
2014-09-04 | 3761-027-1010 | ND |
2014-11-20 | 3761-033-1145 | ND |
2014-12-09 | 3761-027-1040 | ND |
2015-03-05 | 3761-027-0855 | ND |
2015-05-13 | 3761-055-1050 | ND |
2015-07-09 | 3761-017-1100 | ND |
2015-08-20 | 3761-055-0925 | ND |
2015-11-23 | 3761-055-0900 | ND |
2016-02-11 | 3761-055-1040 | ND |
2016-11-23 | 3761-035-1440 | ND |
2017-06-02 | 3761-027-0918 | ND |
2019-07-24 | 9588-017-1115 | ND |