2,4,5-TP (Silvex)
Town of Greenwood 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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | ND | 8 | 0 | ND |
2015 | ND | 4 | 0 | ND |
2016 | ND | 2 | 0 | ND |
2017 | ND | 4 | 0 | ND |
2018 | ND | 4 | 0 | ND |
2019 | ND | 4 | 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 |
---|---|---|
2014-04-07 | AD90461 | ND |
2014-04-07 | AD90461 | ND |
2014-06-16 | AD92363 | ND |
2014-06-16 | AD92364 | ND |
2014-06-16 | AD92365 | ND |
2014-06-16 | AD92365 | ND |
2014-06-16 | AD92364 | ND |
2014-06-16 | AD92363 | ND |
2015-03-23 | 35181011005 | ND |
2015-03-23 | 35181011005 | ND |
2015-10-19 | 35212906005 | ND |
2015-10-19 | 35212906005 | ND |
2016-12-08 | 35282332006 | ND |
2016-12-08 | 35282332006 | ND |
2017-04-17 | 35307223003 | ND |
2017-04-17 | 35307223003 | ND |
2017-10-04 | 35341216002 | ND |
2017-10-04 | 35341216002 | ND |
2018-01-08 | 35367517001 | ND |
2018-01-08 | 35367517001 | ND |
2018-07-23 | 35407298001 | ND |
2018-07-23 | 35407298001 | ND |
2019-02-21 | 35449632001 | ND |
2019-02-21 | 35449632001 | ND |
2019-07-25 | 35485235001 | ND |
2019-07-25 | 35485235001 | ND |