2,4,5-TP (Silvex)
Arizona Water Company - Overgaard
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.
20
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 | N/A | 0 | 0 | N/A |
| 2015 | ND | 9 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 10 | 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 |
|---|---|---|
| 2015-05-19 | 5051552-05 | ND |
| 2015-05-19 | 5051552-04 | ND |
| 2015-05-19 | 5051552-03 | ND |
| 2015-05-19 | 5051552-02 | ND |
| 2015-05-19 | 5051552-01 | ND |
| 2015-11-03 | 5110317-04 | ND |
| 2015-11-03 | 5110317-03 | ND |
| 2015-11-03 | 5110317-02 | ND |
| 2015-11-03 | 5110317-01 | ND |
| 2016-02-22 | 6022013-01 | ND |
| 2018-05-21 | 18E2216-05 SOC | ND |
| 2018-05-21 | 18E2216-04 SOC | ND |
| 2018-05-21 | 18E2216-03 SOC | ND |
| 2018-05-21 | 18E2216-02 SOC | ND |
| 2018-05-21 | 18E2216-01 SOC | ND |
| 2018-10-15 | 18J1761-04 | ND |
| 2018-10-15 | 18J1761-03 | ND |
| 2018-10-15 | 18J1761-02 | ND |
| 2018-10-15 | 18J1761-01 | ND |
| 2018-11-06 | 18K0612-01 | ND |