2,4,5-TP (Silvex)
Richmond County Water System
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.
15
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 | 1 | 0 | ND |
| 2015 | ND | 3 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 3 | 0 | ND |
| 2018 | ND | 3 | 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 |
|---|---|---|
| 2014-09-24 | 92218871001SOC | ND |
| 2015-03-20 | ND | |
| 2015-05-22 | ND | |
| 2015-08-20 | ND | |
| 2016-07-12 | 92305035001SOC | ND |
| 2016-11-15 | 92319768001SOC | ND |
| 2017-08-09 | 92350837001SOC | ND |
| 2017-10-16 | 92359499003SOC | ND |
| 2017-10-30 | 92361282001SOC | ND |
| 2018-02-13 | 92373634003SOC | ND |
| 2018-08-21 | 92396574001SOC | ND |
| 2018-11-05 | 92406163001SOC | ND |
| 2019-01-29 | 92415667001_1271 | ND |
| 2019-04-01 | 92423665001_1271 | ND |
| 2019-09-25 | 92447313001_1271 | ND |