2,4,5-TP (Silvex)
Redlands City
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.
21
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | N/A | 0 | 0 | N/A |
| 2015 | ND | 1 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 19 | 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 |
|---|---|---|
| 2015-05-21 | 9590-026-1120 | ND |
| 2016-05-12 | 9590-026-0915 | ND |
| 2019-06-20 | 4790-035-0930 | ND |
| 2019-06-27 | 4790-070-1325 | ND |
| 2019-06-27 | 4790-003-0845 | ND |
| 2019-06-27 | 4790-069-0945 | ND |
| 2019-08-19 | 4790-062-0950 | ND |
| 2019-08-19 | 4790-008-1100 | ND |
| 2019-08-21 | 4790-021-1140 | ND |
| 2019-08-22 | 4790-019-1050 | ND |
| 2019-08-27 | 4790-053-1350 | ND |
| 2019-08-27 | 4790-055-0800 | ND |
| 2019-08-27 | 4790-060-1230 | ND |
| 2019-08-28 | 4790-017-1330 | ND |
| 2019-08-29 | 4790-029-0945 | ND |
| 2019-09-10 | 4790-010-0930 | ND |
| 2019-09-17 | 4790-031-0930 | ND |
| 2019-09-19 | 4790-025-0915 | ND |
| 2019-09-19 | 4790-026-1020 | ND |
| 2019-09-30 | 4790-022-0910 | ND |
| 2019-09-30 | 4790-012-1320 | ND |