2,4,5-TP (Silvex)
City of Idaho Falls
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 | 1 | 0 | ND |
2015 | N/A | 0 | 0 | N/A |
2016 | ND | 3 | 0 | ND |
2017 | ND | 23 | 0 | ND |
2018 | ND | 2 | 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 |
---|---|---|
2014-02-27 | B17021888-003 | ND |
2016-12-13 | SB16121040003 | ND |
2016-12-13 | SB16121040002 | ND |
2016-12-13 | SB16121040001 | ND |
2017-02-27 | SB17021888003 | ND |
2017-02-27 | SB17021888002 | ND |
2017-02-27 | SB17021888001 | ND |
2017-03-30 | SB17032436001 | ND |
2017-06-13 | SB17061702002 | ND |
2017-06-13 | B17061702009 | ND |
2017-06-13 | B17061702005 | ND |
2017-06-13 | SB17061702008 | ND |
2017-06-13 | SB17061702006 | ND |
2017-06-13 | SB17061702005 | ND |
2017-06-13 | SB17061702004 | ND |
2017-06-13 | SB17061702003 | ND |
2017-06-13 | SB17061702001 | ND |
2017-06-13 | SB17061702007 | ND |
2017-06-13 | SB17061702009 | ND |
2017-06-13 | SB17061702010 | ND |
2017-08-07 | SB17080956005 | ND |
2017-08-07 | SB17080956004 | ND |
2017-08-07 | SB17080956001 | ND |
2017-08-07 | SB17080956003 | ND |
2017-08-07 | SB17080956002 | ND |
2017-08-07 | SB17080956006 | ND |
2017-08-07 | SB17080956007 | ND |
2018-09-18 | SB18091727001 | ND |
2018-10-10 | SB18101095001 | ND |
2019-03-25 | SB19032049001 | ND |
2019-04-16 | SB19041514001 | ND |