2,4,5-TP (Silvex)
Aquarion Water Company of Ct-ridgefield System
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | N/A | 0 | 0 | N/A |
2015 | N/A | 0 | 0 | N/A |
2016 | ND | 6 | 0 | ND |
2017 | N/A | 0 | 0 | N/A |
2018 | N/A | 0 | 0 | N/A |
2019 | ND | 6 | 0 | ND |
ppb = parts per billion
State and national drinking water standards and health guidelines
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 |
---|---|---|
2016-06-07 | 201607150-SOC | ND |
2016-06-07 | 201607155-SOC | ND |
2016-06-07 | 201607160-SOC | ND |
2016-08-03 | 201610102-SOC | ND |
2016-08-03 | 201610108-SOC | ND |
2016-08-03 | 201610104-SOC | ND |
2019-09-18 | 201915009-SOC | ND |
2019-09-18 | 201915008-SOC | ND |
2019-10-02 | 201916042-SOC | ND |
2019-10-08 | 201916443-SOC | ND |
2019-10-16 | 201917012-SOC | ND |
2019-12-17 | 201920468-SOC | ND |