2,4,5-TP (Silvex)
City of Sugar Land
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.
23
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 9 | 0 | ND |
| 2015 | ND | 1 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 6 | 0 | ND |
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 4 | 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 |
|---|---|---|
| 2014-02-11 | AC42272 | ND |
| 2014-03-26 | AC48396 | ND |
| 2014-03-26 | AC48398 | ND |
| 2014-03-26 | AC48397 | ND |
| 2014-03-26 | AC48393 | ND |
| 2014-03-26 | AC48395 | ND |
| 2014-03-26 | AC48394 | ND |
| 2014-04-29 | AC52120 | ND |
| 2014-07-23 | AC60726 | ND |
| 2015-01-22 | AC77382 | ND |
| 2016-02-02 | AD21569 | ND |
| 2017-01-04 | AD63037 | ND |
| 2017-03-22 | AD76421 | ND |
| 2017-03-22 | AD76427 | ND |
| 2017-03-22 | AD76419 | ND |
| 2017-03-22 | AD76420 | ND |
| 2017-04-03 | AD78148 | ND |
| 2018-01-10 | AE08735 | ND |
| 2018-12-10 | AE48428 | ND |
| 2019-01-17 | AE50533 | ND |
| 2019-01-17 | AE50534 | ND |
| 2019-04-08 | AE61474 | ND |
| 2019-07-08 | AE73523 | ND |