2,4,5-TP (Silvex)
Farmington
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.
23
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 | 8 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 7 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 2 | 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 |
|---|---|---|
| 2014-03-05 | 14C0159-04 | ND |
| 2014-03-05 | 14C0164-01 | ND |
| 2014-03-05 | 14C0164-03 | ND |
| 2014-03-05 | 14C0159-03 | ND |
| 2014-06-05 | 14F0406-01 | ND |
| 2014-06-05 | 14F0406-02 | ND |
| 2014-06-05 | 14F0406-03 | ND |
| 2014-06-05 | 14F0406-04 | ND |
| 2015-04-22 | 15D1508-01 | ND |
| 2015-04-22 | 15D1508-03 | ND |
| 2015-07-28 | 15G2181-02 | ND |
| 2015-07-28 | 15G2181-01 | ND |
| 2016-03-28 | 3420911 | ND |
| 2016-03-28 | 3420920 | ND |
| 2016-03-28 | 3420944 | ND |
| 2016-03-28 | 3420955 | ND |
| 2016-03-28 | 3420963 | ND |
| 2016-06-01 | 3462194 | ND |
| 2016-06-01 | 3462210 | ND |
| 2017-02-01 | 17B0058-04 | ND |
| 2017-04-24 | 17D1459-01 | ND |
| 2018-01-03 | 18A0035-04 | ND |
| 2018-05-03 | 18E0322-01 | ND |