2,4,5-TP (Silvex)
Mount Kisco Water Department
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 | 5 | 0 | ND |
| 2019 | ND | 5 | 0 | ND |
| 2020 | ND | 5 | 0 | ND |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 5 | 0 | ND |
| 2023 | ND | 5 | 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 |
|---|---|---|
| 2018-10-28 | 7072449005-SOCS | ND |
| 2018-11-28 | 7072449002-SOCS | ND |
| 2018-11-28 | 7072449003-SOCS | ND |
| 2018-11-28 | 7072449001-SOCS | ND |
| 2018-11-28 | 7072449004-SOCS | ND |
| 2019-10-29 | 70110250003-SOCS | ND |
| 2019-10-29 | 70110250004-SOCS | ND |
| 2019-10-29 | 70110250002-SOCS | ND |
| 2019-10-29 | 70110250001-SOCS | ND |
| 2019-10-31 | 70110250005-SOCS | ND |
| 2020-09-30 | 420-182051-3-SOCS | ND |
| 2020-09-30 | 420-182169-1-SOCS | ND |
| 2020-09-30 | 420-182051-4-SOCS | ND |
| 2020-09-30 | 420-182051-6-SOCS | ND |
| 2020-09-30 | 420-182051-5-SOCS | ND |
| 2021-11-02 | 420-210185-1-SOCS | ND |
| 2021-11-02 | 420-210185-2-SOCS | ND |
| 2021-11-02 | 420-210185-3-SOCS | ND |
| 2021-11-02 | 420-210185-4-SOCS | ND |
| 2022-12-19 | AY22489-SOCS | ND |
| 2022-12-19 | AY22490-SOCS | ND |
| 2022-12-19 | AY22493-SOCS | ND |
| 2022-12-19 | AY22942-SOCS | ND |
| 2022-12-19 | AY22491-SOCS | ND |
| 2023-11-27 | AZ21567-SOCS | ND |
| 2023-11-27 | AZ21566-SOCS | ND |
| 2023-11-27 | AZ21565-SOCS | ND |
| 2023-11-27 | AZ21568-SOCS | ND |
| 2023-11-27 | AZ21564-SOCS | ND |