2,4,5-TP (Silvex)
Forrest City Waterworks
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.
12
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 2 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 4 | 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 |
|---|---|---|
| 2014-04-23 | 14114013802 | ND |
| 2014-08-27 | 14240000602 | ND |
| 2016-07-06 | 16189013502 | ND |
| 2016-07-06 | 16189013602 | ND |
| 2016-10-03 | 16279003202 | ND |
| 2016-10-03 | 16279003102 | ND |
| 2017-04-03 | 17096000202 | ND |
| 2017-07-31 | 17215001701 | ND |
| 2019-07-23 | 19206006701 | ND |
| 2019-07-23 | 19206006806 | ND |
| 2019-10-16 | 19290006402 | ND |
| 2019-10-16 | 19290006202 | ND |