2,4,5-TP (Silvex)
Parker WSD
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.
64
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 | ND | 2 | 0 | ND |
| 2015 | ND | 32 | 0 | ND |
| 2016 | ND | 8 | 0 | ND |
| 2017 | ND | 6 | 0 | ND |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 16 | 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 | Result |
|---|---|
| 2014-07-21 | ND |
| 2014-07-24 | ND |
| 2015-03-19 | ND |
| 2015-03-26 | ND |
| 2015-03-30 | ND |
| 2015-04-15 | ND |
| 2015-04-15 | ND |
| 2015-04-27 | ND |
| 2015-05-21 | ND |
| 2015-05-21 | ND |
| 2015-06-10 | ND |
| 2015-06-10 | ND |
| 2015-06-16 | ND |
| 2015-06-17 | ND |
| 2015-06-17 | ND |
| 2015-06-24 | ND |
| 2015-06-24 | ND |
| 2015-07-29 | ND |
| 2015-08-13 | ND |
| 2015-08-13 | ND |
| 2015-08-20 | ND |
| 2015-08-20 | ND |
| 2015-08-20 | ND |
| 2015-08-26 | ND |
| 2015-09-01 | ND |
| 2015-09-01 | ND |
| 2015-09-01 | ND |
| 2015-09-03 | ND |
| 2015-09-10 | ND |
| 2015-09-15 | ND |
| 2015-09-15 | ND |
| 2015-09-15 | ND |
| 2015-09-16 | ND |
| 2015-10-21 | ND |
| 2016-01-28 | ND |
| 2016-05-03 | ND |
| 2016-07-14 | ND |
| 2016-07-18 | ND |
| 2016-07-28 | ND |
| 2016-10-04 | ND |
| 2016-10-18 | ND |
| 2016-10-18 | ND |
| 2017-06-08 | ND |
| 2017-07-18 | ND |
| 2017-07-24 | ND |
| 2017-07-26 | ND |
| 2017-07-31 | ND |
| 2017-10-23 | ND |
| 2019-04-16 | ND |
| 2019-04-16 | ND |
| 2019-04-17 | ND |
| 2019-04-22 | ND |
| 2019-04-23 | ND |
| 2019-04-25 | ND |
| 2019-04-25 | ND |
| 2019-05-22 | ND |
| 2019-08-27 | ND |
| 2019-08-29 | ND |
| 2019-09-05 | ND |
| 2019-09-16 | ND |
| 2019-09-23 | ND |
| 2019-10-02 | ND |
| 2019-10-17 | ND |
| 2019-10-28 | ND |