2,4,5-TP (Silvex)
Greene County Regional Water System
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.
36
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 | 14 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | ND | 14 | 0 | ND |
| 2018 | ND | 4 | 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 |
|---|---|---|
| 2014-04-14 | 8030-041414-E09S | ND |
| 2014-04-14 | 8030-041414-E12S | ND |
| 2014-05-12 | 8030-051214-E07S | ND |
| 2014-05-12 | 8030-051214-E04S | ND |
| 2014-05-19 | 8030-051914-E05S | ND |
| 2014-05-19 | 8030-051914-E03S | ND |
| 2014-06-11 | 8030-061114-E08S | ND |
| 2014-07-08 | 8030-070814-E07S | ND |
| 2014-07-08 | 8030-070814-E04S | ND |
| 2014-07-08 | 8030-070814-E12S | ND |
| 2014-07-11 | 8030-071114-E09S | ND |
| 2014-07-11 | 8030-071114-E08S | ND |
| 2014-07-11 | 8030-071114-E05S | ND |
| 2014-08-07 | 8030-080714-E03S | ND |
| 2015-06-11 | ND | |
| 2015-06-11 | ND | |
| 2015-08-11 | ND | |
| 2015-08-20 | ND | |
| 2017-04-11 | 8030-041117-E04S | ND |
| 2017-04-11 | 8030-041117-E12S | ND |
| 2017-04-11 | 8030-041117-E07S | ND |
| 2017-04-12 | 8030-041217-E03S | ND |
| 2017-04-12 | 8030-041217-E05S | ND |
| 2017-04-12 | 8030-041217-E09S | ND |
| 2017-05-18 | 8030-051817-E08S | ND |
| 2017-08-28 | 8030-082817-E03S | ND |
| 2017-08-28 | 8030-082817-E08S | ND |
| 2017-08-28 | 8030-082817-E09S | ND |
| 2017-08-30 | 8030-083017-E04S | ND |
| 2017-08-30 | 8030-083017-E05S | ND |
| 2017-08-31 | 8030-083117-E07S | ND |
| 2017-08-31 | 8030-083117-E12S | ND |
| 2018-06-04 | 8030-060418-E11S | ND |
| 2018-06-22 | 8030-062218-E10S | ND |
| 2018-08-08 | 8030-080818-E10S | ND |
| 2018-08-15 | 8030-081518-E11S | ND |