2,4,5-TP (Silvex)
Peter Pitchess Honor Rancho Detention Center
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 | N/A | 0 | 0 | N/A |
2015 | ND | 6 | 0 | ND |
2016 | N/A | 0 | 0 | N/A |
2017 | ND | 1 | 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 |
---|---|---|
2015-02-18 | 5442-003-1155 | ND |
2015-02-18 | 5442-006-1215 | ND |
2015-02-18 | 5442-016-1230 | ND |
2015-05-05 | 5442-003-1250 | ND |
2015-05-05 | 5442-006-1310 | ND |
2015-05-05 | 5442-016-1330 | ND |
2017-09-18 | 9590-016-0945 | ND |
2018-07-16 | 9590-003-0800 | ND |
2018-07-16 | 9590-006-0845 | ND |
2018-10-09 | 9590-003-0900 | ND |
2018-10-09 | 9590-006-0930 | ND |
2019-07-08 | 9590-016-0945 | ND |
2019-09-03 | 9590-003-1030 | ND |
2019-09-03 | 9590-006-0930 | ND |
2019-12-16 | 9590-016-0830 | ND |