2,4,5-TP (Silvex)
City of Riverside
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 |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | ND | 3 | 0 | ND |
2015 | ND | 3 | 0 | ND |
2016 | ND | 4 | 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 |
---|---|---|
2014-01-21 | 9590-107-0949 | ND |
2014-02-18 | 9590-107-0920 | ND |
2014-07-15 | 9590-107-0850 | ND |
2015-01-20 | 9590-107-1030 | ND |
2015-07-14 | 9590-107-0949 | ND |
2015-10-28 | 9590-107-1400 | ND |
2016-01-26 | 9590-107-0947 | ND |
2016-04-19 | 9590-107-1141 | ND |
2016-07-12 | 9590-107-1230 | ND |
2016-10-04 | 9590-107-1233 | ND |
2017-02-28 | 9590-107-0820 | ND |
2017-05-02 | 9590-107-1039 | ND |
2017-07-25 | 9590-107-1055 | ND |
2017-10-03 | 9590-107-0845 | ND |
2018-01-02 | 9590-107-0900 | ND |
2018-04-03 | 9590-107-0910 | ND |
2018-07-03 | 4790-107-1015 | ND |
2018-10-03 | 4790-107-0920 | ND |
2019-01-02 | 4790-107-0900 | ND |
2019-04-02 | 4790-107-0900 | ND |
2019-07-02 | 4790-107-0910 | ND |
2019-10-01 | 4790-107-1139 | ND |