2,4,5-TP (Silvex)
Southern Okla Water Corp
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.
48
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 | N/A | 0 | 0 | N/A |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 32 | 0 | ND |
| 2019 | ND | 16 | 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 |
|---|---|---|
| 2018-01-15 | 1801438 | ND |
| 2018-01-15 | 1801437 | ND |
| 2018-01-15 | 1801436 | ND |
| 2018-01-15 | 1801435 | ND |
| 2018-02-06 | 1802218 | ND |
| 2018-02-06 | 1802217 | ND |
| 2018-02-06 | 1802215 | ND |
| 2018-02-27 | 1802749 | ND |
| 2018-04-10 | 1804401 | ND |
| 2018-04-10 | 1804400 | ND |
| 2018-04-24 | 1804703 | ND |
| 2018-04-24 | 1804704 | ND |
| 2018-05-15 | 1805520 | ND |
| 2018-05-15 | 1805519 | ND |
| 2018-06-19 | 1806560 | ND |
| 2018-06-19 | 1806559 | ND |
| 2018-07-17 | 1807552 | ND |
| 2018-07-17 | 1807551 | ND |
| 2018-08-07 | 1808226 | ND |
| 2018-08-07 | 1808225 | ND |
| 2018-08-21 | 18081130 | ND |
| 2018-08-21 | 18081129 | ND |
| 2018-09-13 | 1809537 | ND |
| 2018-09-13 | 1809538 | ND |
| 2018-10-09 | 1810353 | ND |
| 2018-10-09 | 1810352 | ND |
| 2018-10-16 | 1810469 | ND |
| 2018-10-16 | 1810468 | ND |
| 2018-11-13 | 1811422 | ND |
| 2018-11-13 | 1811421 | ND |
| 2018-11-27 | 1811684 | ND |
| 2018-11-27 | 1811683 | ND |
| 2019-10-01 | 1910022 | ND |
| 2019-10-09 | 1910342 | ND |
| 2019-11-24 | 1911699 | ND |
| 2019-11-24 | 1911697 | ND |
| 2019-11-24 | 1911698 | ND |
| 2019-11-24 | 1911700 | ND |
| 2019-12-10 | 1912369 | ND |
| 2019-12-10 | 1912368 | ND |
| 2019-12-10 | 1912367 | ND |
| 2019-12-10 | 1912366 | ND |
| 2019-12-10 | 1912365 | ND |
| 2019-12-10 | 1912364 | ND |
| 2019-12-17 | 1912630 | ND |
| 2019-12-17 | 1912633 | ND |
| 2019-12-17 | 1912632 | ND |
| 2019-12-17 | 1912631 | ND |