2,4,5-TP (Silvex)
Town of Annetta Deer Creek
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 | N/A | 0 | 0 | N/A |
| 2019 | ND | 1 | 0 | ND |
| 2020 | ND | 8 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 1 | 0 | ND |
| 2023 | ND | 6 | 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
| Date | Lab ID | Result |
|---|---|---|
| 2019-06-03 | Q1930677032 | ND |
| 2020-01-30 | Q2003934006 | ND |
| 2020-04-21 | Q2015803008 | ND |
| 2020-04-21 | Q2015803031 | ND |
| 2020-04-21 | Q2015803032 | ND |
| 2020-04-21 | Q2015803033 | ND |
| 2020-04-21 | Q2015803035 | ND |
| 2020-08-27 | Q2034434019 | ND |
| 2020-10-14 | Q2040327007 | ND |
| 2021-03-10 | Q2106410001 | ND |
| 2021-04-22 | Q2110415007 | ND |
| 2022-11-17 | Q2234711004 | ND |
| 2023-11-08 | Q2348107005 | ND |
| 2023-11-08 | Q2348107030 | ND |
| 2023-11-08 | Q2348107031 | ND |
| 2023-11-08 | Q2348107032 | ND |
| 2023-11-08 | Q2348107033 | ND |
| 2023-11-08 | Q2348107048 | ND |