2,4,5-TP (Silvex)
Klamath Falls Water Department
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.
28
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 | N/A | 0 | 0 | N/A |
| 2015 | ND | 14 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 14 | 0 | ND |
| 2019 | N/A | 0 | 0 | N/A |
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 |
|---|---|---|
| 2015-06-23 | 506243202-S | ND |
| 2015-06-23 | 506243207-S | ND |
| 2015-06-23 | 506243206-S | ND |
| 2015-06-23 | 506243201-S | ND |
| 2015-06-23 | 506243204-S | ND |
| 2015-06-23 | 506243205-S | ND |
| 2015-06-23 | 506243203-S | ND |
| 2015-08-11 | 508111402-S | ND |
| 2015-08-11 | 508111405-S | ND |
| 2015-08-11 | 508111404-S | ND |
| 2015-08-11 | 508111401-S | ND |
| 2015-08-11 | 508111406-S | ND |
| 2015-08-11 | 508111407-S | ND |
| 2015-08-11 | 508111403-S | ND |
| 2018-07-19 | 18078901A-S | ND |
| 2018-07-19 | 180789007A-S | ND |
| 2018-07-19 | 180789006A-S | ND |
| 2018-07-19 | 180789005A-S | ND |
| 2018-07-19 | 180789004A-S | ND |
| 2018-07-19 | 180789003A-S | ND |
| 2018-07-25 | 1807B4301A-S | ND |
| 2018-10-04 | 181024101A-S | ND |
| 2018-10-04 | 181024201A-S | ND |
| 2018-10-04 | 181023901A-S | ND |
| 2018-10-04 | 181024001A-S | ND |
| 2018-10-04 | 181024501A-S | ND |
| 2018-10-04 | 181024401A-S | ND |
| 2018-10-04 | 181023801A-S | ND |