2,4,5-TP (Silvex)
Torrington 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 | 2 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 4 | 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
| Date | Lab ID | Result |
|---|---|---|
| 2018-05-08 | D8E0876-02SOCR | ND |
| 2018-05-08 | D8E0876-01SOCR | ND |
| 2019-05-14 | D9E1449-01SOC | ND |
| 2019-05-14 | D9E1476-02SOCR | ND |
| 2019-05-14 | D9E1476-01SOCR | ND |
| 2019-08-13 | D9H1460-01SOC | ND |
| 2020-05-12 | D0E0828-02SOC | ND |
| 2020-05-12 | D0E0828-01SOC | ND |
| 2021-05-11 | D1E1034-02SOC | ND |
| 2021-05-11 | D1E1034-01SOC | ND |
| 2022-05-10 | D2E0906-01SOC | ND |
| 2022-05-11 | D2E1173-02SOC | ND |
| 2022-05-11 | D2E1173-01SOC | ND |
| 2022-08-09 | D2H1077-01SOC | ND |
| 2023-06-06 | 202309357-SOCR | ND |