2,4,5-TP (Silvex)
Liberty Water Rio Rico
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 |
|---|---|---|---|---|
| 2014 | N/A | 0 | 0 | N/A |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | ND | 12 | 0 | ND |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 12 | 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 |
|---|---|---|
| 2016-05-18 | 3453953 | ND |
| 2016-05-18 | 3453947 | ND |
| 2016-05-18 | 3453941 | ND |
| 2016-05-18 | 3453935 | ND |
| 2016-06-27 | 3479517 | ND |
| 2016-06-27 | 3479511 | ND |
| 2016-08-23 | 3530512 | ND |
| 2016-08-23 | 3530542 | ND |
| 2016-08-23 | 3530536 | ND |
| 2016-08-23 | 3530530 | ND |
| 2016-08-23 | 3530524 | ND |
| 2016-08-23 | 3530518 | ND |
| 2019-04-09 | 4257188 | ND |
| 2019-04-09 | 4257182 | ND |
| 2019-04-09 | 4257176 | ND |
| 2019-04-09 | 4257170 | ND |
| 2019-04-09 | 4257164 | ND |
| 2019-04-09 | 4257158 | ND |
| 2019-08-12 | 4386017 | ND |
| 2019-08-12 | 4386061 | ND |
| 2019-08-12 | 4386055 | ND |
| 2019-08-12 | 4386049 | ND |
| 2019-08-12 | 4386029 | ND |
| 2019-08-12 | 4386023 | ND |