2,4,5-TP (Silvex)
California Water Service (CWS) - Selma
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 | 35 | 0 | ND |
2015 | N/A | 0 | 0 | N/A |
2016 | N/A | 0 | 0 | N/A |
2017 | N/A | 0 | 0 | N/A |
2018 | N/A | 0 | 0 | N/A |
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 |
---|---|---|
2014-02-05 | 5810-013-1509 | ND |
2014-02-11 | 5810-005-0955 | ND |
2014-02-12 | 5810-022-1130 | ND |
2014-02-12 | 5810-018-1305 | ND |
2014-02-19 | 5810-004-1040 | ND |
2014-02-19 | 5810-001-0959 | ND |
2014-03-10 | 5810-036-0935 | ND |
2014-03-10 | 5810-038-1035 | ND |
2014-03-10 | 5810-007-1130 | ND |
2014-03-11 | 5810-014-0925 | ND |
2014-03-11 | 5810-023-1130 | ND |
2014-03-11 | 5810-021-1013 | ND |
2014-05-06 | 5810-005-1020 | ND |
2014-05-06 | 5810-001-1005 | ND |
2014-05-06 | 5810-004-1116 | ND |
2014-05-13 | 5810-018-1055 | ND |
2014-05-13 | 5810-007-0940 | ND |
2014-05-13 | 5810-022-0959 | ND |
2014-06-03 | 5810-014-1120 | ND |
2014-06-03 | 5810-038-1058 | ND |
2014-06-03 | 5810-021-0940 | ND |
2014-06-03 | 5810-036-1020 | ND |
2014-06-03 | 5810-013-1137 | ND |
2014-06-10 | 5810-023-1150 | ND |
2014-06-16 | 5810-010-1330 | ND |
2014-08-05 | 5810-005-1010 | ND |
2014-08-05 | 5810-004-1055 | ND |
2014-08-05 | 5810-001-1028 | ND |
2014-08-13 | 5810-022-1400 | ND |
2014-08-19 | 5810-018-1045 | ND |
2014-09-03 | 5810-038-1045 | ND |
2014-09-03 | 5810-023-1005 | ND |
2014-09-03 | 5810-021-0918 | ND |
2014-09-03 | 5810-014-1105 | ND |
2014-09-09 | 5810-013-1131 | ND |