2,4,5-TP (Silvex)
South Bethany
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.
20
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 | 10 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 2 | 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 |
|---|---|---|
| 2014-05-15 | L5060600-1 | ND |
| 2014-06-11 | L5105693-2-515 | ND |
| 2014-06-30 | L4949121-1-515 | ND |
| 2014-06-30 | L4949121-1 515 | ND |
| 2014-07-08 | L5148536-1 515 | ND |
| 2014-07-08 | L5148535-1 515 | ND |
| 2014-09-18 | L5251488-2 515 | ND |
| 2014-09-25 | L5242401-1 515 | ND |
| 2014-10-22 | L5293426-1-515 | ND |
| 2014-12-01 | L5347927-1-515 | ND |
| 2015-06-24 | L5530440-515 | ND |
| 2015-06-24 | L5507381-1-515 | ND |
| 2016-01-11 | L5711890-1 515 | ND |
| 2016-01-20 | L6019358-1 515 | ND |
| 2017-08-30 | L6857483-515 | ND |
| 2017-08-30 | L6844903-1 515 | ND |
| 2018-09-26 | 8101077-01 515 | ND |
| 2018-09-26 | 8101075-01 515 | ND |
| 2019-08-26 | 9083228-01 M515 | ND |
| 2019-08-26 | 9083233-01 M515 | ND |