2,4,5-TP (Silvex)
Danbury 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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | ND | 2 | 0 | ND |
2015 | ND | 2 | 0 | ND |
2016 | ND | 6 | 0 | ND |
2017 | ND | 2 | 0 | ND |
2018 | ND | 2 | 0 | ND |
2019 | ND | 4 | 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 |
---|---|---|
2014-11-18 | E411D88-2SOC | ND |
2014-11-18 | E411D88-1SOC | ND |
2015-05-05 | E505239-2SOC | ND |
2015-05-05 | E505239-1SOC | ND |
2016-05-16 | E605J73-1SOC | ND |
2016-05-17 | E605J73-2SOC | ND |
2016-07-13 | 185886CH | ND |
2016-07-13 | 185887CH | ND |
2016-10-18 | 190230CH | ND |
2016-10-18 | 190228CH | ND |
2017-10-18 | 206246GE | ND |
2017-10-18 | 206249GE | ND |
2018-10-11 | SOCR 200508918 | ND |
2018-10-11 | SOCR 200508919 | ND |
2019-06-20 | SOC 200537240 | ND |
2019-06-20 | SOC 200537278 | ND |
2019-12-04 | SOC 200558922 | ND |
2019-12-04 | SOC 200558921 | ND |