2,4,5-TP (Silvex)
Kalaheo-Koloa
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 | N/A | 0 | 0 | N/A |
2015 | ND | 18 | 0 | ND |
2016 | N/A | 0 | 0 | N/A |
2017 | ND | 1 | 0 | ND |
2018 | ND | 22 | 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 |
---|---|---|
2015-07-06 | C15-07-0171A | ND |
2015-07-06 | C15-07-0170A | ND |
2015-07-06 | C15-07-0174A | ND |
2015-07-06 | C15-07-0173A | ND |
2015-07-06 | C15-07-0172A | ND |
2015-07-08 | C15-07-0225A | ND |
2015-07-08 | C15-07-0226A | ND |
2015-07-08 | C15-07-0227A | ND |
2015-07-08 | C15-07-0228A | ND |
2015-10-19 | C15-10-0033A | ND |
2015-10-19 | C15-10-0034A | ND |
2015-10-19 | C15-10-0035A | ND |
2015-10-19 | C15-10-0036A | ND |
2015-10-19 | C15-10-0037A | ND |
2015-10-21 | C15-10-0071A | ND |
2015-10-21 | C15-10-0072A | ND |
2015-10-21 | C15-10-0073A | ND |
2015-10-21 | C15-10-0074A | ND |
2017-05-16 | ND | |
2018-01-29 | 201801000000 | ND |
2018-01-29 | 201801310036 | ND |
2018-06-04 | C18-06-0013A | ND |
2018-06-04 | C18-06-0014A | ND |
2018-06-05 | C18-06-0063A | ND |
2018-06-05 | C18-06-0064A | ND |
2018-06-05 | C18-06-0062A | ND |
2018-06-19 | C18-06-0135A | ND |
2018-06-19 | C18-06-0134A | ND |
2018-06-19 | C18-06-0136A | ND |
2018-06-19 | C18-06-0137A | ND |
2018-06-19 | C18-06-0138A | ND |
2018-09-10 | C18-09-0202A | ND |
2018-09-10 | C18-09-0203A | ND |
2018-09-11 | C18-09-0216A | ND |
2018-09-11 | C18-09-0215A | ND |
2018-09-11 | C18-09-0217A | ND |
2018-09-12 | C18-09-0244A | ND |
2018-09-12 | C18-09-0247A | ND |
2018-09-12 | C18-09-0246A | ND |
2018-09-12 | C18-09-0245A | ND |
2018-09-12 | C18-09-0243A | ND |
2019-01-30 | 201901310193 | ND |
2019-06-19 | C19-06-0131A | ND |
2019-07-17 | C19-07-0164A | ND |
2019-10-21 | C19-10-0064A | ND |