2,4,5-TP (Silvex)
Southern Nevada 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.
36
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 | 4 | 0 | ND |
| 2015 | ND | 9 | 0 | ND |
| 2016 | ND | 7 | 0 | ND |
| 2017 | ND | 5 | 0 | ND |
| 2018 | ND | 6 | 0 | ND |
| 2019 | ND | 5 | 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 |
|---|---|---|
| 2014-02-18 | 14020225-002 | ND |
| 2014-02-18 | 14020235-002 | ND |
| 2014-08-18 | 14080245-003 | ND |
| 2014-08-19 | 14080292-002 | ND |
| 2015-02-17 | 15020219-002 | ND |
| 2015-02-18 | 15020285-003 | ND |
| 2015-05-04 | 15040556-001 | ND |
| 2015-08-24 | 15080364-003 | ND |
| 2015-08-26 | 15080480-002 | ND |
| 2015-09-28 | 15090448-002A | ND |
| 2015-09-28 | 15090448-003A | ND |
| 2015-12-21 | 15120302-002 | ND |
| 2015-12-21 | 15120302-003 | ND |
| 2016-02-08 | 16020070-003 | ND |
| 2016-02-09 | 16020130-002 | ND |
| 2016-05-23 | 16050225-002 | ND |
| 2016-05-23 | 16050225-003 | ND |
| 2016-08-09 | S1604052001 | ND |
| 2016-08-09 | S1603584002 | ND |
| 2016-08-09 | S1603584001 | ND |
| 2017-05-22 | S1701203003 | ND |
| 2017-05-22 | S1701203002 | ND |
| 2017-08-28 | S1703629001 | ND |
| 2017-08-28 | S1703629003 | ND |
| 2017-08-28 | S1703629002 | ND |
| 2018-02-06 | S1708762003 | ND |
| 2018-02-06 | S1708762002 | ND |
| 2018-02-06 | S1708762001 | ND |
| 2018-08-07 | S1803807001 | ND |
| 2018-08-07 | S1803807002 | ND |
| 2018-08-07 | S1803807003 | ND |
| 2019-02-12 | S1805444002 | ND |
| 2019-02-12 | S1805444003 | ND |
| 2019-02-12 | S1805444001 | ND |
| 2019-08-13 | S1922741003 | ND |
| 2019-08-13 | S1922741002 | ND |