2,4,5-TP (Silvex)
Hoke County Regional Water System
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 | 3 | 0 | ND |
2015 | ND | 12 | 0 | ND |
2016 | ND | 22 | 0 | ND |
2017 | ND | 6 | 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 |
---|---|---|
2014-03-18 | 2995646 | ND |
2014-03-18 | 2995652 | ND |
2014-03-18 | 2995627 | ND |
2015-03-17 | ND | |
2015-03-23 | ND | |
2015-03-23 | ND | |
2015-06-01 | ND | |
2015-06-01 | ND | |
2015-08-18 | ND | |
2015-08-18 | ND | |
2015-08-18 | ND | |
2015-08-18 | ND | |
2015-12-15 | ND | |
2015-12-15 | ND | |
2015-12-15 | ND | |
2016-02-17 | 8139-021716-E23S | ND |
2016-02-17 | 8139-021716-E26S | ND |
2016-02-17 | 8139-021716-EP5S | ND |
2016-02-17 | 8139-021716-EP9S | ND |
2016-05-09 | 8139-050916-EP9S | ND |
2016-05-11 | 8139-051116-EP5S | ND |
2016-05-11 | 8139-051116-EP4S | ND |
2016-05-11 | 8139-051116-E26S | ND |
2016-05-11 | 8139-051116-EP1S | ND |
2016-05-11 | 8139-051116-EP2S | ND |
2016-06-15 | 8139-061516-E23S | ND |
2016-06-15 | 8139-061516-E10S | ND |
2016-07-06 | 8139-070616-EP3S | ND |
2016-08-22 | 37729_16-29225 | ND |
2016-08-22 | 37729_16-29227 | ND |
2016-08-22 | 37729_16-29224 | ND |
2016-08-22 | 37729_16-29222 | ND |
2016-08-23 | 37729_16-29223 | ND |
2016-08-23 | 37729_16-29213 | ND |
2016-08-23 | 37729_16-29226 | ND |
2016-11-15 | 37729_16-40274 | ND |
2016-11-15 | 37729_16-40273 | ND |
2017-03-07 | 37729_17-07905 | ND |
2017-03-07 | 37729_17-07907 | ND |
2017-05-02 | 37729_17-14772 | ND |
2017-05-02 | 37729_17-14774 | ND |
2017-08-22 | 37729_17-30211 | ND |
2017-11-15 | 37729_17-43225 | ND |