2,4,5-TP (Silvex)
Carlsbad Municipal 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.
18
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 | 2 | 0 | ND |
| 2017 | ND | 6 | 0 | ND |
| 2018 | ND | 4 | 0 | ND |
| 2019 | N/A | 0 | 0 | N/A |
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 |
|---|---|---|
| 2014-01-15 | 1401736-005A | ND |
| 2014-06-24 | 1406C70-005A | ND |
| 2014-06-24 | 1406C63-001A | ND |
| 2014-06-24 | 1406C71-005A | ND |
| 2014-10-16 | 1410961-001A | ND |
| 2014-10-16 | 1410960-001A | ND |
| 2016-02-09 | 1602465-005A | ND |
| 2016-04-12 | 1604620-002A | ND |
| 2017-06-05 | 2017016713 | ND |
| 2017-06-05 | 2017016711 | ND |
| 2017-06-05 | 2017016712 | ND |
| 2017-10-30 | 2017031535 | ND |
| 2017-10-30 | 2017031533 | ND |
| 2017-10-30 | 2017031534 | ND |
| 2018-06-04 | 1806144-002 | ND |
| 2018-07-09 | 2018018954 | ND |
| 2018-09-10 | 1809604-002 | ND |
| 2018-10-01 | 2018028329 | ND |