2,4,5-TP (Silvex)
Aquarion Water Company of Connecticut - Greenwich 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.
20
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | ND | 2 | 0 | ND |
| 2015 | ND | 6 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 2 | 0 | ND |
| 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 |
|---|---|---|
| 2014-06-03 | 201407498-SOCR | ND |
| 2014-06-03 | 201407487-SOCR | ND |
| 2015-04-07 | 201504250-SOC | ND |
| 2015-04-07 | 201504259-SOC | ND |
| 2015-06-02 | 201506883-SOCR | ND |
| 2015-06-02 | 201506893-SOCR | ND |
| 2015-07-06 | 201508666-SOC | ND |
| 2015-07-06 | 201508675-SOC | ND |
| 2016-06-07 | 201607108-SOCR | ND |
| 2016-06-20 | 201607794-SOCR | ND |
| 2017-06-05 | 201708089-SOCR | ND |
| 2017-06-05 | 201708098-SOCR | ND |
| 2018-06-04 | 201807476-SOCR | ND |
| 2018-06-04 | 201807485-SOCR | ND |
| 2019-06-03 | 201907836-SOCR | ND |
| 2019-06-03 | 201907864-SOCR | ND |
| 2019-07-01 | 201909729-SOC | ND |
| 2019-07-02 | 201909869-SOC | ND |
| 2019-10-01 | 201915908-SOC | ND |
| 2019-11-11 | 201918481-SOC | ND |