2,4,5-TP (Silvex)
City of Elko
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.
21
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 | 2 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | ND | 15 | 0 | ND |
| 2017 | ND | 1 | 0 | ND |
| 2018 | N/A | 0 | 0 | N/A |
| 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 |
|---|---|---|
| 2014-05-05 | S201405-0177 | ND |
| 2014-05-05 | 1410186-01 | ND |
| 2016-03-23 | A6C2465-01-SOC | ND |
| 2016-03-23 | A6C2467-01 | ND |
| 2016-05-02 | A6E0431-01 | ND |
| 2016-06-01 | A6F0363-01 | ND |
| 2016-06-01 | A6F0362-01 | ND |
| 2016-06-01 | A6F0360-01 | ND |
| 2016-06-01 | A6F0361-01 | ND |
| 2016-06-01 | A6F0364-01 | ND |
| 2016-06-21 | A6F2667-01 | ND |
| 2016-06-28 | A6F3204-01 | ND |
| 2016-06-28 | A6F3207-01 | ND |
| 2016-07-13 | 1619518-01 | ND |
| 2016-07-13 | 1619520-01 | ND |
| 2016-07-20 | 1620227-01 | ND |
| 2016-07-20 | 1620228-01 | ND |
| 2017-08-21 | A7H2838-01 | ND |
| 2019-08-20 | B19082034-001B | ND |
| 2019-08-21 | B19082173-001B | ND |
| 2019-09-04 | B19090361-001 | ND |