2,4,5-TP (Silvex)
New Braunfels Utilities
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 | 6 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 5 | 0 | ND |
| 2018 | ND | 1 | 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 |
|---|---|---|
| 2014-01-31 | AC41102 | ND |
| 2014-03-31 | AC48780 | ND |
| 2014-03-31 | AC48782 | ND |
| 2014-03-31 | AC48781 | ND |
| 2014-03-31 | AC48779 | ND |
| 2014-03-31 | AC48778 | ND |
| 2016-01-12 | AD17655 | ND |
| 2016-01-12 | AD17653 | ND |
| 2016-02-24 | AD25475 | ND |
| 2016-04-07 | AD32369 | ND |
| 2017-03-29 | AD77519 | ND |
| 2017-05-30 | AD85976 | ND |
| 2017-05-30 | AD85974 | ND |
| 2017-05-30 | AD85977 | ND |
| 2017-05-30 | AD85975 | ND |
| 2018-10-29 | AE44779 | ND |
| 2019-02-04 | AE52735 | ND |
| 2019-02-04 | AE52737 | ND |
| 2019-03-18 | AE58833 | ND |
| 2019-04-22 | AE63241 | ND |
| 2019-07-30 | AE76468 | ND |