2,4,5-TP (Silvex)
Brigham City 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.
24
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 |
|---|---|---|---|---|
| 2012 | N/A | 0 | 0 | N/A |
| 2013 | ND | 6 | 0 | ND |
| 2014 | ND | 2 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | ND | 15 | 0 | ND |
| 2017 | ND | 1 | 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 | Result |
|---|---|
| 2013-05-29 | ND |
| 2013-05-29 | ND |
| 2013-05-29 | ND |
| 2013-06-26 | ND |
| 2013-07-17 | ND |
| 2013-10-16 | ND |
| 2014-01-23 | ND |
| 2014-07-10 | ND |
| 2016-05-04 | ND |
| 2016-05-04 | ND |
| 2016-05-18 | ND |
| 2016-05-18 | ND |
| 2016-06-09 | ND |
| 2016-06-09 | ND |
| 2016-06-09 | ND |
| 2016-07-20 | ND |
| 2016-07-20 | ND |
| 2016-08-17 | ND |
| 2016-08-17 | ND |
| 2016-08-17 | ND |
| 2016-08-17 | ND |
| 2016-08-17 | ND |
| 2016-10-05 | ND |
| 2017-02-23 | ND |