2,4,5-TP (Silvex)
City of Apache Junction
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.
13
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 | 1 | 0 | ND |
| 2016 | ND | 3 | 0 | ND |
| 2017 | ND | 5 | 0 | ND |
| 2018 | N/A | 0 | 0 | N/A |
| 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 |
|---|---|---|
| 2015-12-21 | 5121791-01 | ND |
| 2016-03-15 | 6031295-01 | ND |
| 2016-03-15 | 6031295-02 | ND |
| 2016-04-05 | 6040336-02S | ND |
| 2017-01-05 | 7010476-01V | ND |
| 2017-01-05 | 7010476-02S | ND |
| 2017-05-19 | 7051996-01 | ND |
| 2017-05-19 | 7051996-02 | ND |
| 2017-07-06 | 7070405-02SOC | ND |
| 2019-01-22 | 19A2212-01 | ND |
| 2019-01-22 | 19A2212-02 | ND |
| 2019-07-23 | 19G2836-01 | ND |
| 2019-07-23 | 19G2836-02 | ND |