2,4,5-TP (Silvex)
Keene 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 | 5 | 0 | ND |
2015 | ND | 5 | 0 | ND |
2016 | ND | 5 | 0 | ND |
2017 | ND | 5 | 0 | ND |
2018 | ND | 5 | 0 | ND |
2019 | ND | 5 | 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 |
---|---|---|
2014-07-16 | 1407-14072-001 | ND |
2014-11-12 | 1411-23739-001 | ND |
2014-11-12 | 1411-23764-001 | ND |
2014-11-12 | 1411-23770-001 | ND |
2014-12-11 | 1412-25528-001 | ND |
2015-07-16 | 1507-14513-001 | ND |
2015-10-21 | 1510-23052-001 | ND |
2015-10-21 | 1510-23054-001 | ND |
2015-10-21 | 1510-23056-001 | ND |
2015-10-21 | 1510-23046-001 | ND |
2016-07-13 | 1607-15148-001 | ND |
2016-10-26 | 1610-24748-001 | ND |
2016-10-26 | 1610-24757-001 | ND |
2016-11-02 | 1611-25392-001 | ND |
2016-11-09 | 1611-25942-001 | ND |
2017-07-12 | 1707-15735-001 | ND |
2017-10-18 | 1710-25339-001 | ND |
2017-10-18 | 1710-25350-001 | ND |
2017-10-18 | 1710-25362-001 | ND |
2017-11-15 | 1711-27694-001SO | ND |
2018-07-25 | 1807-18364-001 | ND |
2018-10-17 | 1810-27364-001 | ND |
2018-10-17 | 1810-27349-001 | ND |
2018-10-17 | 1810-27331-001 | ND |
2018-12-11 | 1812-32023-001 | ND |
2019-07-31 | 1908-18886-004 | ND |
2019-10-09 | 1910-26708-001 | ND |
2019-10-09 | 1910-26708-003 | ND |
2019-11-06 | 1911-29206-001-S | ND |
2019-11-06 | 1911-29213-001-S | ND |