2,4,5-TP (Silvex)
Cooper County Consolidated Public Water Supply District # 1
NOTE: Cooper County Consolidated Public Water Supply District # 1 purchases water from Boonville PWS which is required to test for 2,4,5-tp (silvex). Sample information shown below was taken by Boonville PWS.
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 | 1 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
| 2020 | ND | 1 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 1 | 0 | ND |
| 2023 | ND | 1 | 0 | ND |
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
NOTE: Cooper County Consolidated Public Water Supply District # 1 purchases water from Boonville PWS which is required to test for 2,4,5-tp (silvex). Sample information shown below was taken by Boonville PWS.
| Date | Lab ID | Result |
|---|---|---|
| 2018-05-23 | AD20839 | ND |
| 2018-08-22 | AD31540 | ND |
| 2019-05-21 | AD47806 | ND |
| 2020-05-27 | 2008890 | ND |
| 2021-05-26 | 2110934 | ND |
| 2022-05-23 | 2211549 | ND |
| 2023-05-22 | 2308124 | ND |