2,4,5-TP (Silvex)
Jonesboro 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.
31
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 | 8 | 0 | ND |
| 2015 | ND | 5 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | ND | 8 | 0 | ND |
| 2018 | ND | 10 | 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 |
|---|---|---|
| 2014-01-28 | 14030000602 | ND |
| 2014-01-28 | 14030001808 | ND |
| 2014-01-28 | 14030000402 | ND |
| 2014-01-28 | 14030000502 | ND |
| 2014-04-15 | 14107000302 | ND |
| 2014-04-15 | 14107000102 | ND |
| 2014-04-15 | 14107000202 | ND |
| 2014-06-10 | 14163003202 | ND |
| 2015-04-21 | 15113013702 | ND |
| 2015-04-21 | 15113014002 | ND |
| 2015-04-21 | 15113014102 | ND |
| 2015-04-21 | 15113013902 | ND |
| 2015-04-21 | 15113013802 | ND |
| 2017-01-30 | 17032000702 | ND |
| 2017-01-30 | 17032000402 | ND |
| 2017-01-30 | 17032000502 | ND |
| 2017-02-07 | 17040002002 | ND |
| 2017-05-03 | 17124005102 | ND |
| 2017-05-03 | 17124005202 | ND |
| 2017-05-03 | 17124005402 | ND |
| 2017-05-03 | 17124005302 | ND |
| 2018-01-11 | 18012001602 | ND |
| 2018-01-11 | 18012001802 | ND |
| 2018-01-11 | 18012001402 | ND |
| 2018-01-11 | 18012001702 | ND |
| 2018-01-11 | 18012001502 | ND |
| 2018-04-10 | 18101009702 | ND |
| 2018-04-10 | 18101009602 | ND |
| 2018-04-10 | 18101010002 | ND |
| 2018-04-10 | 18101009902 | ND |
| 2018-04-10 | 18101009802 | ND |