2,4,5-TP (Silvex)
City of Walterboro
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.
19
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 | N/A | 0 | 0 | N/A |
| 2015 | ND | 11 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 8 | 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 |
|---|---|---|
| 2015-07-29 | AD58799 | ND |
| 2015-07-29 | AD58800 | ND |
| 2015-07-29 | AD58806 | ND |
| 2015-07-29 | AD58809 | ND |
| 2015-07-29 | AD58810 | ND |
| 2015-07-29 | AD58796 | ND |
| 2015-08-05 | AD59196 | ND |
| 2015-08-05 | AD59197 | ND |
| 2015-08-05 | AD59193 | ND |
| 2015-08-05 | AD59163 | ND |
| 2015-08-05 | AD59162 | ND |
| 2019-10-22 | AE39023 | ND |
| 2019-10-22 | AE39024 | ND |
| 2019-10-22 | AE39030 | ND |
| 2019-10-23 | AE39131 | ND |
| 2019-10-23 | AE39151 | ND |
| 2019-10-23 | AE39129 | ND |
| 2019-10-24 | AE39272 | ND |
| 2019-10-24 | AE39276 | ND |