2,4,5-TP (Silvex)
Hamlet Water System
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.
10
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 | 1 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 4 | 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 |
|---|---|---|
| 2015-01-28 | ND | |
| 2016-05-17 | CZ07365-01 | ND |
| 2016-07-05 | CZ10308-01 | ND |
| 2018-04-17 | CB06028-01 | ND |
| 2018-07-17 | CB10987-01 | ND |
| 2018-11-06 | CB17695-01 | ND |
| 2019-02-05 | CC02112-01 | ND |
| 2019-05-01 | CC06948-01 | ND |
| 2019-08-13 | CC13829-01 | ND |
| 2019-11-19 | CC19714-01RE1 | ND |