2,4,5-TP (Silvex)
New Design - Frederick County
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.
10
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | ND | 2 | 0 | ND |
| 2015 | ND | 1 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 3 | 0 | ND |
| 2018 | ND | 2 | 0 | ND |
| 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 |
|---|---|---|
| 2014-05-27 | 0100030_01_00517 | ND |
| 2014-06-04 | 0100030_05_00531 | ND |
| 2015-04-01 | E15003103001 | ND |
| 2016-06-06 | E16004612002 | ND |
| 2016-07-13 | E17000153002 | ND |
| 2017-04-05 | E17003936007 | ND |
| 2017-04-05 | E17003936005 | ND |
| 2017-06-15 | E17004992001 | ND |
| 2018-04-12 | E18003684001 | ND |
| 2018-06-26 | E18004645001 | ND |