2,4,5-TP (Silvex)
Arizona Water Company - Sedona
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.
32
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 | 16 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 15 | 0 | ND |
| 2019 | ND | 1 | 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 |
|---|---|---|
| 2015-05-19 | 5051638-07S | ND |
| 2015-05-19 | 5051638-06S | ND |
| 2015-05-19 | 5051638-05S | ND |
| 2015-05-19 | 5051638-04S | ND |
| 2015-05-19 | 5051638-03S | ND |
| 2015-05-19 | 5051638-02S | ND |
| 2015-05-19 | 5051638-01S | ND |
| 2015-06-17 | 5061654-01S | ND |
| 2015-11-04 | 5110415-01 | ND |
| 2015-11-04 | 5110415-08T | ND |
| 2015-11-04 | 5110415-07T | ND |
| 2015-11-04 | 5110415-06 | ND |
| 2015-11-04 | 5110415-05T | ND |
| 2015-11-04 | 5110415-04T | ND |
| 2015-11-04 | 5110415-03T | ND |
| 2015-11-04 | 5110415-02 | ND |
| 2018-05-09 | 18E1147-08 SOC | ND |
| 2018-05-09 | 18E1147-07 SOC | ND |
| 2018-05-09 | 18E1147-06 SOC | ND |
| 2018-05-09 | 18E1147-05 SOC | ND |
| 2018-05-09 | 18E1147-04 SOC | ND |
| 2018-05-16 | 18E1760-03 SOC | ND |
| 2018-05-16 | 18E1760-02 SOC | ND |
| 2018-05-16 | 18E1760-01 SOC | ND |
| 2018-10-24 | 18J2635-04 | ND |
| 2018-10-24 | 18J2635-03 | ND |
| 2018-10-24 | 18J2635-02 | ND |
| 2018-10-24 | 18J2635-01 | ND |
| 2018-10-24 | 18J2631-03 | ND |
| 2018-10-24 | 18J2631-02 | ND |
| 2018-10-24 | 18J2631-01 | ND |
| 2019-06-05 | 19F0622-01 | ND |