2,4,5-TP (Silvex)
Slippery Rock Municipal 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.
14
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 | 6 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 5 | 0 | ND |
| 2018 | ND | 2 | 0 | ND |
| 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 |
|---|---|---|
| 2014-03-13 | 14031358-01 | ND |
| 2014-06-19 | 14062548-01 | ND |
| 2014-06-19 | 14062550-01 | ND |
| 2014-09-11 | 14091213-01 | ND |
| 2014-09-11 | 14091217-01 | ND |
| 2014-12-11 | 14121420-01 | ND |
| 2016-12-07 | 15449601 | ND |
| 2017-03-22 | 15869914 | ND |
| 2017-06-01 | 16344324 | ND |
| 2017-06-08 | 16344353 | ND |
| 2017-09-27 | 16810220 | ND |
| 2017-09-27 | 16810199 | ND |
| 2018-03-15 | 2302800001 | ND |
| 2018-09-27 | 2341473001 | ND |