2,4,5-TP (Silvex)
SJWTX Triple Peak Plant
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 | 7 | 0 | ND |
2015 | ND | 2 | 0 | ND |
2016 | ND | 5 | 0 | ND |
2017 | ND | 10 | 0 | ND |
2018 | ND | 3 | 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 |
---|---|---|
2014-03-31 | AC48769 | ND |
2014-03-31 | AC48768 | ND |
2014-04-17 | AC51147 | ND |
2014-04-17 | AC51149 | ND |
2014-04-17 | AC51146 | ND |
2014-04-17 | AC51148 | ND |
2014-06-24 | AC57845 | ND |
2015-06-03 | AC94464 | ND |
2015-11-03 | AD12434 | ND |
2016-01-26 | AD20169 | ND |
2016-01-26 | AD20165 | ND |
2016-06-14 | AD40525 | ND |
2016-07-26 | AD45773 | ND |
2016-12-01 | AD59982 | ND |
2017-02-01 | AD68174 | ND |
2017-02-01 | AD68175 | ND |
2017-02-01 | AD68173 | ND |
2017-05-03 | AD82845 | ND |
2017-05-03 | AD82844 | ND |
2017-05-31 | AD86221 | ND |
2017-05-31 | AD86219 | ND |
2017-05-31 | AD86215 | ND |
2017-05-31 | AD86214 | ND |
2017-07-27 | AD91179 | ND |
2018-06-20 | AE30828 | ND |
2018-09-24 | AE41360 | ND |
2018-11-06 | AE45469 | ND |
2019-02-12 | AE54217 | ND |
2019-02-12 | AE54216 | ND |
2019-05-22 | AE67769 | ND |
2019-06-18 | AE71192 | ND |