2,4,5-TP (Silvex)
City of Albemarle
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 2 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 8 | 0 | ND |
| 2017 | ND | 3 | 0 | ND |
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 6 | 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 |
|---|---|---|
| 2014-02-20 | 8252-022014-TW1S | ND |
| 2014-02-20 | 8252-022014-TS5S | ND |
| 2015-02-25 | ND | |
| 2015-02-25 | ND | |
| 2016-02-18 | 8252-021816-TS5S | ND |
| 2016-02-18 | 8252-021816-TW1S | ND |
| 2016-05-19 | 8252-051916-TS5S | ND |
| 2016-05-19 | 8252-051916-TW1S | ND |
| 2016-08-11 | 8252-081116-TW1S | ND |
| 2016-08-11 | 8252-081116-TS5S | ND |
| 2016-11-03 | 8252-110316-TW1S | ND |
| 2016-11-03 | 8252-110316-TS5S | ND |
| 2017-02-02 | 8252-020217-TS5S | ND |
| 2017-02-02 | 8252-020217-TW1S | ND |
| 2017-09-13 | 8252-091317-TS5S | ND |
| 2018-01-31 | 8252-013118-TS5S | ND |
| 2018-01-31 | 8252-013118-TW1S | ND |
| 2019-01-10 | 8252-011019-TS5S | ND |
| 2019-01-10 | 8252-011019-TW1S | ND |
| 2019-05-30 | 8252-053019-TS5S | ND |
| 2019-05-30 | 8252-053019-TW1S | ND |
| 2019-08-08 | 8252-080819-TS5S | ND |
| 2019-08-08 | 8252-080819-TW1S | ND |