2,4,5-TP (Silvex)
Aquarion Water Company of Connecticut - Mystic
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 | 5 | 0 | ND |
| 2020 | ND | 1 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 5 | 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 |
|---|---|---|
| 2018-06-04 | 201807451-SOCR | ND |
| 2019-06-03 | 201907868-SOCR | ND |
| 2019-09-16 | 201914727-SOC | ND |
| 2019-09-16 | 201914728-SOC | ND |
| 2019-10-14 | 201916705-SOC | ND |
| 2019-10-14 | 201916706-SOC | ND |
| 2020-06-01 | 202007939-SOCR | ND |
| 2021-06-01 | 202107709-SOCR | ND |
| 2022-06-06 | 202208972-SOCR | ND |
| 2022-08-29 | 202215059-SOC | ND |
| 2022-09-22 | 202216920-SOC | ND |
| 2022-10-03 | 202217583-SOC | ND |
| 2022-10-03 | 202217585-SOC | ND |
| 2023-06-05 | 202309143-SOCR | ND |