2,4,5-TP (Silvex)
City of Lawrence
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.
21
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | N/A | 0 | 0 | N/A |
| 2015 | ND | 2 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 9 | 0 | ND |
| 2019 | ND | 8 | 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 |
|---|---|---|
| 2015-05-06 | MAY2015-SEMIVOC | ND |
| 2015-05-06 | MAY-15-SEMIVOC | ND |
| 2017-06-14 | 2017-06-14-TP002 | ND |
| 2017-06-14 | 2017-06-14-TP001 | ND |
| 2018-02-14 | 2018-02-14-TP1-S | ND |
| 2018-02-14 | 2018-02-14-TP002 | ND |
| 2018-02-14 | 2018-02-14-TP002 | ND |
| 2018-05-10 | 2018-05-10-TP1-S | ND |
| 2018-05-10 | 2018-05-10-TP002 | ND |
| 2018-08-15 | 2018-08-15-TP1-S | ND |
| 2018-08-15 | 2018-11-01-TP1-S | ND |
| 2018-08-15 | 2018-08-15-TP002 | ND |
| 2018-11-01 | 2018-11-01-TP002 | ND |
| 2019-02-14 | 2019-02-14 SOC T | ND |
| 2019-02-14 | 2019-02-14 SOC T | ND |
| 2019-05-14 | 2019-05-14-SOC-T | ND |
| 2019-05-14 | 2019-05-14-SOC T | ND |
| 2019-08-07 | 2019-08-07-SOC-T | ND |
| 2019-08-07 | 2019-08-07-SOC T | ND |
| 2019-11-18 | 2019-11-18-SOC-T | ND |
| 2019-11-18 | 2019-11-18-SOC-T | ND |