2,4,5-TP (Silvex)
Marina Coast 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 |
---|---|---|---|---|
2014 | N/A | 0 | 0 | N/A |
2015 | N/A | 0 | 0 | N/A |
2016 | ND | 13 | 0 | ND |
2017 | ND | 1 | 0 | ND |
2018 | N/A | 0 | 0 | N/A |
2019 | ND | 14 | 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 |
---|---|---|
2016-08-22 | 9590-027-1247 | ND |
2016-09-20 | 9590-028-1027 | ND |
2016-09-20 | 9590-008-0823 | ND |
2016-09-20 | 9590-009-0747 | ND |
2016-09-20 | 9590-034-0904 | ND |
2016-09-20 | 9590-026-1104 | ND |
2016-09-20 | 9590-033-0948 | ND |
2016-12-06 | 9590-026-1056 | ND |
2016-12-06 | 9590-028-0725 | ND |
2016-12-06 | 9590-027-0835 | ND |
2016-12-06 | 9590-033-0753 | ND |
2016-12-06 | 9590-034-0958 | ND |
2016-12-06 | 9590-008-0926 | ND |
2017-02-14 | 9590-009-0810 | ND |
2019-09-25 | 9590-027-0918 | ND |
2019-09-25 | 9590-033-1025 | ND |
2019-09-25 | 9590-028-0945 | ND |
2019-09-25 | 9590-034-1134 | ND |
2019-09-25 | 9590-026-1220 | ND |
2019-09-25 | 9590-009-0815 | ND |
2019-09-25 | 9590-008-0725 | ND |
2019-12-17 | 9590-027-1000 | ND |
2019-12-17 | 9590-028-1110 | ND |
2019-12-17 | 9590-026-1231 | ND |
2019-12-17 | 9590-009-1351 | ND |
2019-12-17 | 9590-033-1153 | ND |
2019-12-17 | 9590-008-1311 | ND |
2019-12-17 | 9590-034-0913 | ND |