2,4,5-TP (Silvex)
Kent County Water Authority
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.
22
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 | 12 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | ND | 10 | 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 |
|---|---|---|
| 2014-03-17 | 1401808-04_PE21 | ND |
| 2014-03-17 | 1401808-03_PE21 | ND |
| 2014-03-17 | 1401808-02_PE21 | ND |
| 2014-03-17 | 1401808-05_PE21 | ND |
| 2014-04-21 | 1402378-02_PE21 | ND |
| 2014-04-21 | 1402378-04_PE21 | ND |
| 2014-08-13 | 1404415-02_PE21 | ND |
| 2014-08-13 | 1404415-01_PE21 | ND |
| 2014-09-23 | 1405125-01_PE21 | ND |
| 2014-10-27 | 1405505-03_PE21 | ND |
| 2014-10-27 | 1405505-04_PE21 | ND |
| 2014-10-27 | 1405505-02_PE21 | ND |
| 2017-03-20 | 1701538-01_PE21 | ND |
| 2017-03-20 | 1701538-03_PE21 | ND |
| 2017-03-20 | 1701538-04_PE21 | ND |
| 2017-04-25 | 1701960-03_PE21 | ND |
| 2017-09-05 | 1704240-01_PE21 | ND |
| 2017-09-05 | 1704240-03_PE21 | ND |
| 2017-09-05 | 1704240-02_PE21 | ND |
| 2017-09-29 | 1704540-01_PE21 | ND |
| 2017-11-01 | 1704844-01_PE21 | ND |
| 2017-11-01 | 1704844-02_PE21 | ND |