2,4,5-TP (Silvex)
Liberty Utilities - Bellflower - Norwalk
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 | 7 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 6 | 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 |
|---|---|---|
| 2015-03-12 | 9588-025-0920 | ND |
| 2015-03-12 | 9588-026-0850 | ND |
| 2015-05-21 | 9588-031-0915 | ND |
| 2015-06-18 | 9588-031-0825 | ND |
| 2015-06-18 | 9588-025-1325 | ND |
| 2015-06-18 | 9588-026-0900 | ND |
| 2015-12-15 | 9588-031-0945 | ND |
| 2016-04-07 | 9588-031-1415 | ND |
| 2016-04-07 | 9588-025-1230 | ND |
| 2016-04-07 | 9588-026-1320 | ND |
| 2016-12-08 | 9588-016-1130 | ND |
| 2017-04-17 | 9588-016-1300 | ND |
| 2017-10-20 | 9588-016-1115 | ND |
| 2018-01-22 | 9588-025-1300 | ND |
| 2018-04-05 | 9588-025-0830 | ND |
| 2018-04-09 | 9588-026-0730 | ND |
| 2018-05-11 | 9588-031-1110 | ND |
| 2018-08-16 | 9588-031-0800 | ND |
| 2018-09-13 | 9588-026-0945 | ND |
| 2019-02-13 | 9588-016-1120 | ND |
| 2019-08-13 | 9588-016-0945 | ND |