2,4,5-TP (Silvex)
Altoona 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 |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | ND | 12 | 0 | ND |
2015 | N/A | 0 | 0 | N/A |
2016 | N/A | 0 | 0 | N/A |
2017 | ND | 12 | 0 | ND |
2018 | N/A | 0 | 0 | N/A |
2019 | N/A | 0 | 0 | N/A |
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 |
---|---|---|
2014-06-09 | 14061228-01 | ND |
2014-06-10 | 14061236-01 | ND |
2014-06-10 | 14061234-01 | ND |
2014-06-10 | 14061233-01 | ND |
2014-06-10 | 14061235-01 | ND |
2014-06-18 | 14062293-01 | ND |
2014-08-07 | 14081262-01 | ND |
2014-08-07 | 14081267-01 | ND |
2014-08-08 | 14081269-01 | ND |
2014-08-08 | 14081264-01 | ND |
2014-08-08 | 14081266-01 | ND |
2014-08-08 | 14081271-01 | ND |
2017-05-16 | 16316526 | ND |
2017-05-16 | 16316448 | ND |
2017-05-16 | 16316474 | ND |
2017-05-16 | 16316500 | ND |
2017-05-16 | 16316422 | ND |
2017-05-16 | 16316396 | ND |
2017-08-16 | 16783128 | ND |
2017-08-16 | 16783182 | ND |
2017-08-16 | 16783155 | ND |
2017-08-16 | 16624853 | ND |
2017-08-16 | 16624829 | ND |
2017-08-16 | 16783101 | ND |