2,4,5-TP (Silvex)
City of Rialto
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 | 11 | 0 | ND |
2015 | N/A | 0 | 0 | N/A |
2016 | N/A | 0 | 0 | N/A |
2017 | ND | 1 | 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 |
---|---|---|
2014-06-25 | 4790-001-1140 | ND |
2014-06-25 | 4790-045-1330 | ND |
2014-06-25 | 4790-046-1045 | ND |
2014-06-26 | 4790-001-1045 | ND |
2014-06-26 | 4790-001-1200 | ND |
2014-06-26 | 4790-001-1445 | ND |
2014-06-26 | 4790-001-1530 | ND |
2014-06-26 | 4790-004-1200 | ND |
2014-06-26 | 4790-017-1530 | ND |
2014-06-26 | 4790-018-1045 | ND |
2014-06-26 | 4790-019-1445 | ND |
2017-09-29 | 4790-001-1200 | ND |