2,4,5-TP (Silvex)
South Bend Water Works
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.
37
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 | 18 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 16 | 0 | ND |
| 2019 | ND | 3 | 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 |
|---|---|---|
| 2015-04-22 | 3228995RS28-1502 | ND |
| 2015-04-22 | 3228986RS28-1502 | ND |
| 2015-04-22 | 3228977RS28-1502 | ND |
| 2015-04-29 | 3232654RS28-1502 | ND |
| 2015-04-29 | 3232663RS28-1502 | ND |
| 2015-05-27 | 3249588RS28-1502 | ND |
| 2015-05-27 | 3249597RS28-1502 | ND |
| 2015-05-28 | 3250577RS28-1502 | ND |
| 2015-05-29 | 3251661RS28-1502 | ND |
| 2015-07-21 | 3283149RS28-1503 | ND |
| 2015-07-21 | 3283158RS28-1503 | ND |
| 2015-07-21 | 3283167RS28-1503 | ND |
| 2015-08-05 | 3292841RS28-1503 | ND |
| 2015-08-05 | 3292850RS28-1503 | ND |
| 2015-08-05 | 3292859RS28-1503 | ND |
| 2015-08-26 | 3309693RS28-1503 | ND |
| 2015-08-26 | 3309702RS28-1503 | ND |
| 2015-09-24 | 3328472RS28-1503 | ND |
| 2018-04-27 | 415059RS28-1802 | ND |
| 2018-04-27 | 415058RS28-1802 | ND |
| 2018-04-27 | 415057RS28-1802 | ND |
| 2018-04-27 | 415056RS28-1802 | ND |
| 2018-05-09 | 416068RS28-1802 | ND |
| 2018-05-09 | 416070RS28-1802 | ND |
| 2018-05-24 | 417463RS28-1802 | ND |
| 2018-05-24 | 418429RS28-1802 | ND |
| 2018-07-27 | 4003103RS28-1803 | ND |
| 2018-07-27 | 40031116RS28-180 | ND |
| 2018-07-27 | 4003127RS28-1803 | ND |
| 2018-08-03 | 4009969RS28-1803 | ND |
| 2018-08-03 | 4009983RS28-1803 | ND |
| 2018-08-09 | 4016540RS28-1803 | ND |
| 2018-08-10 | 4017751RS28-1803 | ND |
| 2018-08-24 | 4034362RS28-1803 | ND |
| 2019-03-12 | 445768RS28-1901 | ND |
| 2019-07-25 | 459661RS28-1903 | ND |
| 2019-12-19 | 4518940 | ND |