2,4,5-TP (Silvex)
Epcor Water - Chaparral City
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 | N/A | 0 | 0 | N/A |
2015 | ND | 4 | 0 | ND |
2016 | N/A | 0 | 0 | N/A |
2017 | N/A | 0 | 0 | N/A |
2018 | ND | 7 | 0 | ND |
2019 | N/A | 0 | 0 | N/A |
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 |
---|---|---|
2015-01-07 | 5010449-01S | ND |
2015-03-17 | 5031422-01S | ND |
2015-06-24 | 5062142-01 | ND |
2015-11-24 | 5112029-01 | ND |
2018-03-29 | 18C2771-01 SOC | ND |
2018-03-29 | 18C2771-02 SOC | ND |
2018-03-29 | 18C2771-03 SOC | ND |
2018-06-19 | 18F1989-01 | ND |
2018-06-19 | 18F1989-02 | ND |
2018-06-19 | 18F1989-03 | ND |
2018-12-11 | 18L1082-01 | ND |