2,4,5-TP (Silvex)
City of Kuna
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.
19
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 | 1 | 0 | ND |
| 2015 | ND | 6 | 0 | ND |
| 2016 | ND | 3 | 0 | ND |
| 2017 | ND | 5 | 0 | ND |
| 2018 | ND | 3 | 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 |
|---|---|---|
| 2014-05-13 | S1416901 | ND |
| 2015-03-13 | S1509638 | ND |
| 2015-03-13 | S1509639 | ND |
| 2015-03-13 | S1509640 | ND |
| 2015-04-06 | S1512654 | ND |
| 2015-04-06 | S1512655 | ND |
| 2015-04-06 | S1512656 | ND |
| 2016-02-26 | S1607873 | ND |
| 2016-08-08 | S1635084 | ND |
| 2016-10-05 | S1645684 | ND |
| 2017-02-17 | S1706516 | ND |
| 2017-02-17 | S1706515 | ND |
| 2017-06-13 | S1724939 | ND |
| 2017-09-26 | S1744576 | ND |
| 2017-12-19 | S1758821 | ND |
| 2018-03-26 | S1812803 | ND |
| 2018-06-20 | S1828518 | ND |
| 2018-09-25 | S1847685 | ND |
| 2019-09-16 | S1946341 | ND |