2,4,5-TP (Silvex)
City of Idalou
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.
13
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 | 4 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 4 | 0 | ND |
| 2018 | ND | 1 | 0 | ND |
| 2019 | ND | 1 | 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 |
|---|---|---|
| 2014-03-13 | Q1408243004 | ND |
| 2014-06-17 | Q1421629012 | ND |
| 2014-06-17 | Q1421629013 | ND |
| 2014-09-18 | Q1445932004 | ND |
| 2015-03-25 | Q1511064007 | ND |
| 2015-06-23 | Q1523309005 | ND |
| 2016-09-08 | Q1636371007 | ND |
| 2017-03-14 | Q1710443006 | ND |
| 2017-07-25 | Q1730586007 | ND |
| 2017-10-12 | Q1752321001 | ND |
| 2017-10-25 | Q1755075005 | ND |
| 2018-10-25 | Q1842795001 | ND |
| 2019-04-10 | Q1914418011 | ND |