2,4,5-TP (Silvex)
Quint-mar Water Authority
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 | N/A | 0 | 0 | N/A |
2016 | ND | 10 | 0 | ND |
2017 | ND | 2 | 0 | ND |
2018 | N/A | 0 | 0 | N/A |
2019 | ND | 10 | 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 |
---|---|---|
2014-02-13 | AA88468 | ND |
2014-07-29 | AA90730 | ND |
2016-06-14 | AB12484 | ND |
2016-06-14 | AB12485 | ND |
2016-06-14 | AB12482 | ND |
2016-06-14 | AB12483 | ND |
2016-06-14 | AB12481 | ND |
2016-07-20 | AB13721 | ND |
2016-07-20 | AB13722 | ND |
2016-07-20 | AB13720 | ND |
2016-07-20 | AB13719 | ND |
2016-07-20 | AB13718 | ND |
2017-01-26 | AB17479 | ND |
2017-07-13 | AB21022 | ND |
2019-02-05 | AB32809 | ND |
2019-02-05 | AB32808 | ND |
2019-02-05 | AB32811 | ND |
2019-02-05 | AB32810 | ND |
2019-04-17 | AB34287 | ND |
2019-07-17 | AB36909 | ND |
2019-07-17 | AB36910 | ND |
2019-07-17 | AB36911 | ND |
2019-07-17 | AB36912 | ND |
2019-07-17 | AB36908-1 | ND |