2,4,5-TP (Silvex)
City of Florence
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.
25
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | ND | 2 | 0 | ND |
| 2015 | ND | 9 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 8 | 0 | ND |
| 2019 | ND | 3 | 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 |
|---|---|---|
| 2014-05-27 | AD40319 | ND |
| 2014-05-27 | AD40317 | ND |
| 2015-03-17 | AD53072 | ND |
| 2015-03-18 | AD53103 | ND |
| 2015-03-18 | AD53105 | ND |
| 2015-03-18 | AD53107 | ND |
| 2015-03-18 | AD53109 | ND |
| 2015-03-18 | AD53112 | ND |
| 2015-03-18 | AD53114 | ND |
| 2015-03-18 | AD53116 | ND |
| 2015-03-18 | AD53118 | ND |
| 2016-03-29 | AD73324 | ND |
| 2017-02-01 | AD89158 | ND |
| 2017-02-01 | AD89168 | ND |
| 2018-01-30 | AE06813 | ND |
| 2018-01-30 | AE06829 | ND |
| 2018-01-30 | AE06838 | ND |
| 2018-01-30 | AE06840 | ND |
| 2018-01-30 | AE06842 | ND |
| 2018-04-11 | AE10678 | ND |
| 2018-04-11 | AE10699 | ND |
| 2018-10-23 | AE20304 | ND |
| 2019-01-15 | AE24119 | ND |
| 2019-04-04 | AE28248 | ND |
| 2019-10-03 | AE38224 | ND |