2,4,5-TP (Silvex)
Vaughn WC Inc
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.
16
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 | N/A | 0 | 0 | N/A |
| 2016 | ND | 6 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 6 | 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 |
|---|---|---|
| 2014-07-31 | 5867-050-1400 | ND |
| 2014-08-27 | 5867-046-1040 | ND |
| 2016-06-29 | 5867-026-1120 | ND |
| 2016-06-29 | 5867-035-1200 | ND |
| 2016-07-27 | 5867-020-1130 | ND |
| 2016-07-27 | 5867-027-1230 | ND |
| 2016-08-31 | 5867-018-1100 | ND |
| 2016-09-29 | 5867-048-1325 | ND |
| 2017-06-22 | 5867-046-1035 | ND |
| 2017-06-22 | 5867-050-1000 | ND |
| 2019-03-19 | 5867-020-1150 | ND |
| 2019-03-19 | 5867-048-1010 | ND |
| 2019-04-25 | 5867-018-1255 | ND |
| 2019-04-25 | 5867-026-1350 | ND |
| 2019-05-28 | 5867-035-1140 | ND |
| 2019-06-18 | 5867-027-1450 | ND |