2,4,5-TP (Silvex)
City of Cumberland
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 | 2 | 0 | ND |
2015 | ND | 2 | 0 | ND |
2016 | ND | 2 | 0 | ND |
2017 | ND | 2 | 0 | ND |
2018 | ND | 1 | 0 | ND |
2019 | ND | 1 | 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 |
---|---|---|
2014-04-28 | 0010008_01_00476 | ND |
2014-07-16 | 0010008_01_4G171 | ND |
2015-04-16 | 5D16092-01 | ND |
2015-05-18 | E15003584001 | ND |
2016-04-20 | 2137885001_A | ND |
2016-05-23 | E16004430001 | ND |
2017-04-05 | 7D06186_01 | ND |
2017-04-11 | E17004026005 | ND |
2018-06-18 | E18004538001 | ND |
2019-04-10 | 9D12071_01 | ND |