2,4,5-TP (Silvex)
City of Newport
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.
32
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 | 16 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | ND | 16 | 0 | ND |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
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 |
|---|---|---|
| 2014-01-06 | 1401012-05_PE21 | ND |
| 2014-01-06 | 1401012-07_PE21 | ND |
| 2014-01-06 | 1401012-06_PE21 | ND |
| 2014-01-06 | 1401012-04_PE21 | ND |
| 2014-01-06 | 1401012-08_PE21 | ND |
| 2014-05-21 | 1402793-04_PE21 | ND |
| 2014-05-21 | 1402793-06_PE21 | ND |
| 2014-05-21 | 1402793-05_PE21 | ND |
| 2014-07-02 | 1403537-01_PE21 | ND |
| 2014-07-02 | 1403537-05_PE21 | ND |
| 2014-07-02 | 1403537-04_PE21 | ND |
| 2014-07-02 | 1403537-03_PE21 | ND |
| 2014-07-02 | 1403537-02_PE21 | ND |
| 2014-11-17 | 1405683-05_PE21 | ND |
| 2014-11-17 | 1405683-06_PE21 | ND |
| 2014-11-17 | 1405683-02_PE21 | ND |
| 2017-01-24 | 1701020-02_PE21 | ND |
| 2017-01-25 | 1701027-03_PE21 | ND |
| 2017-01-25 | 1701027-05_PE21 | ND |
| 2017-01-25 | 1701027-04_PE21 | ND |
| 2017-01-25 | 1701027-02_PE21 | ND |
| 2017-05-15 | 1702185-02_PE21 | ND |
| 2017-05-15 | 1702185-01_PE21 | ND |
| 2017-05-19 | 1702237-05_PE21 | ND |
| 2017-07-10 | 1703108-03_PE21 | ND |
| 2017-07-10 | 1703108-02_PE21 | ND |
| 2017-07-10 | 1703108-01_PE21 | ND |
| 2017-07-10 | 1703108-04_PE21 | ND |
| 2017-07-11 | 1703142-02_PE21 | ND |
| 2017-11-14 | 1704991-05_PE21 | ND |
| 2017-11-20 | 1705061-02_PE21 | ND |
| 2017-11-20 | 1705061-01_PE21 | ND |