2,4,5-TP (Silvex)
Berwick Bayou Vista Water Works Commission
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.
22
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 | N/A | 0 | 0 | N/A |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 4 | 0 | ND |
| 2018 | ND | 6 | 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 |
|---|---|---|
| 2015-02-24 | 35177310001 | ND |
| 2015-02-24 | 35177310001 | ND |
| 2015-09-24 | 35208879001 | ND |
| 2015-09-24 | 35208879001 | ND |
| 2016-01-11 | 35224753001 | ND |
| 2016-01-11 | 35224753001 | ND |
| 2016-09-19 | 35266189001 | ND |
| 2016-09-19 | 35266189001 | ND |
| 2017-01-10 | 35288198001 | ND |
| 2017-01-10 | 35288198001 | ND |
| 2017-10-11 | 35341635001 | ND |
| 2017-10-11 | 35341635001 | ND |
| 2018-01-25 | 35370415001 | ND |
| 2018-01-25 | 35370415001 | ND |
| 2018-05-03 | 35390206001 | ND |
| 2018-05-03 | 35390206001 | ND |
| 2018-07-09 | 35403038001 | ND |
| 2018-07-09 | 35403038001 | ND |
| 2019-01-15 | 35442693001 | ND |
| 2019-01-15 | 35442693001 | ND |
| 2019-07-09 | 35480722001 | ND |
| 2019-07-09 | 35480722001 | ND |