2,4,5-TP (Silvex)
City of Granbury
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 |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | ND | 9 | 0 | ND |
2015 | N/A | 0 | 0 | N/A |
2016 | ND | 3 | 0 | ND |
2017 | ND | 24 | 0 | ND |
2018 | ND | 1 | 0 | ND |
2019 | ND | 2 | 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 |
---|---|---|
2014-07-09 | Q1426808036 | ND |
2014-07-09 | Q1426808035 | ND |
2014-07-09 | Q1426808034 | ND |
2014-07-09 | Q1426808033 | ND |
2014-07-09 | Q1426808032 | ND |
2014-07-09 | Q1426808031 | ND |
2014-07-09 | Q1426808030 | ND |
2014-07-09 | Q1426808029 | ND |
2014-10-22 | Q1453503010 | ND |
2016-01-14 | Q1601671021 | ND |
2016-01-14 | Q1601671019 | ND |
2016-01-14 | Q1601671020 | ND |
2017-04-17 | Q1715565030 | ND |
2017-04-17 | Q1715565029 | ND |
2017-04-17 | Q1715565028 | ND |
2017-04-17 | Q1715565027 | ND |
2017-04-17 | Q1715565026 | ND |
2017-07-06 | Q1727515031 | ND |
2017-07-06 | Q1727515032 | ND |
2017-07-06 | Q1727515012 | ND |
2017-07-06 | Q1727515011 | ND |
2017-07-06 | Q1727515030 | ND |
2017-07-06 | Q1727515014 | ND |
2017-09-19 | Q1744801026 | ND |
2017-09-19 | Q1744801027 | ND |
2017-09-19 | Q1744801028 | ND |
2017-09-19 | Q1744801029 | ND |
2017-09-19 | Q1744801030 | ND |
2017-09-19 | Q1744801031 | ND |
2017-10-03 | Q1748324036 | ND |
2017-10-03 | Q1748324035 | ND |
2017-10-03 | Q1748324034 | ND |
2017-10-03 | Q1748324033 | ND |
2017-10-03 | Q1748324032 | ND |
2017-10-04 | Q1748839007 | ND |
2017-10-04 | Q1748839006 | ND |
2018-01-22 | Q1802342007 | ND |
2019-03-18 | Q1911097030 | ND |
2019-03-18 | Q1911097031 | ND |