2,4,5-TP (Silvex)
Canada Woods Water Company
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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 5 | 0 | ND |
| 2023 | N/A | 0 | 0 | N/A |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
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 |
|---|---|---|
| 2018-04-06 | CA2702588_029_029-201804061010 | ND |
| 2018-04-06 | CA2702588_008_008-201804061110 | ND |
| 2018-04-06 | CA2702588_028_028-201804061050 | ND |
| 2019-03-28 | CA2702588_027_027-201903281216 | ND |
| 2019-08-27 | CA2702588_002_002-201908271134 | ND |
| 2019-08-27 | CA2702588_001_001-201908271122 | ND |
| 2019-12-26 | CA2702588_010_010-201912260906 | ND |
| 2021-12-20 | CA2702588_028_028-202112201015 | ND |
| 2021-12-20 | CA2702588_029_029-202112201015 | ND |
| 2022-12-08 | CA2702588_002_002-202212081340 | ND |
| 2022-12-08 | CA2702588_001_001-202212081320 | ND |
| 2022-12-13 | CA2702588_008_008-202212131345 | ND |
| 2022-12-13 | CA2702588_010_010-202212131230 | ND |
| 2022-12-13 | CA2702588_027_027-202212131300 | ND |