2,4,5-TP (Silvex)
North Kona
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 | 18 | 0 | ND |
2015 | ND | 2 | 0 | ND |
2016 | N/A | 0 | 0 | N/A |
2017 | ND | 12 | 0 | ND |
2018 | ND | 8 | 0 | ND |
2019 | ND | 2 | 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 |
---|---|---|
2014-03-18 | C14-03-0148A | ND |
2014-03-18 | C14-03-0149A | ND |
2014-03-18 | C14-03-0150A | ND |
2014-03-18 | C14-03-0151A | ND |
2014-03-18 | C14-03-0152A | ND |
2014-03-18 | C14-03-0153A | ND |
2014-03-18 | C14-03-0154A | ND |
2014-03-18 | C14-03-0155A | ND |
2014-03-18 | C14-03-0147A | ND |
2014-04-15 | C14-04-0148A | ND |
2014-04-15 | C14-04-0150A | ND |
2014-04-15 | C14-04-0149A | ND |
2014-04-15 | C14-04-0147A | ND |
2014-04-15 | C14-04-0146A | ND |
2014-04-15 | C14-04-0145A | ND |
2014-04-15 | C14-04-0144 | ND |
2014-04-15 | C14-04-0143 | ND |
2014-07-07 | C14-07-0094A | ND |
2015-08-19 | 201508150137 | ND |
2015-11-18 | 201508150170 | ND |
2017-03-14 | ND | |
2017-03-14 | ND | |
2017-03-14 | ND | |
2017-03-14 | ND | |
2017-03-14 | ND | |
2017-03-14 | ND | |
2017-06-05 | ND | |
2017-06-05 | ND | |
2017-06-05 | ND | |
2017-06-05 | ND | |
2017-06-05 | ND | |
2017-06-05 | ND | |
2018-01-17 | C18-01-0085A | ND |
2018-01-17 | C18-01-0086A | ND |
2018-06-18 | C18-06-0129A | ND |
2018-07-08 | 201805230559 | ND |
2018-09-24 | C18-09-0286A | ND |
2018-10-15 | 201810170192 | ND |
2018-12-03 | C18-12-0016A | ND |
2018-12-03 | C18-12-0017A | ND |
2019-09-09 | 201909100461 | ND |
2019-10-09 | C19-10-0031A | ND |