2,4,5-TP (Silvex)
Southwest Alabama Water Authority
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 | 6 | 0 | ND |
2015 | N/A | 0 | 0 | N/A |
2016 | ND | 1 | 0 | ND |
2017 | ND | 6 | 0 | ND |
2018 | ND | 4 | 0 | ND |
2019 | ND | 6 | 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 |
---|---|---|
2014-01-15 | AA88288 | ND |
2014-01-15 | AA88289 | ND |
2014-01-15 | AA88287 | ND |
2014-08-04 | AA90871 | ND |
2014-08-04 | AA90873 | ND |
2014-08-04 | AA90872 | ND |
2016-12-16 | 16L0361-1S | ND |
2017-01-11 | AB17260 | ND |
2017-01-11 | AB17259 | ND |
2017-01-11 | AB17258 | ND |
2017-10-11 | AB23660 | ND |
2017-10-11 | AB23658 | ND |
2017-10-11 | AB23659 | ND |
2018-01-10 | AB25033 | ND |
2018-04-09 | AB26304 | ND |
2018-08-07 | AB29104 | ND |
2018-10-11 | AB30927 | ND |
2019-05-13 | AB35062 | ND |
2019-05-13 | AB35064 | ND |
2019-05-13 | AB35066 | ND |
2019-12-11 | AB40590 | ND |
2019-12-11 | AB40588 | ND |
2019-12-11 | AB40589 | ND |