2,4,5-TP (Silvex)
Robeson 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.
69
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 | ND | 19 | 0 | ND |
| 2015 | ND | 7 | 0 | ND |
| 2016 | ND | 7 | 0 | ND |
| 2017 | ND | 18 | 0 | ND |
| 2018 | ND | 8 | 0 | ND |
| 2019 | ND | 10 | 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 |
|---|---|---|
| 2014-01-06 | 8410-010614-002S | ND |
| 2014-01-06 | 8410-010614-001S | ND |
| 2014-01-06 | 8410-010614-006S | ND |
| 2014-01-06 | 8410-010614-005S | ND |
| 2014-01-06 | 8410-010614-004S | ND |
| 2014-01-06 | 8410-010614-003S | ND |
| 2014-01-13 | 8410-011314-008S | ND |
| 2014-01-13 | 8410-011314-009S | ND |
| 2014-01-13 | 8410-011314-011S | ND |
| 2014-05-05 | 8410-050514-001S | ND |
| 2014-05-05 | 8410-050514-006S | ND |
| 2014-05-05 | 8410-050514-008S | ND |
| 2014-05-05 | 8410-050514-009S | ND |
| 2014-05-05 | 8410-050514-011S | ND |
| 2014-05-12 | 8410-051214-002S | ND |
| 2014-05-12 | 8410-051214-003S | ND |
| 2014-05-12 | 8410-051214-004S | ND |
| 2014-05-12 | 8410-051214-005S | ND |
| 2014-10-06 | 8410-100614-012S | ND |
| 2015-02-02 | ND | |
| 2015-03-16 | ND | |
| 2015-04-13 | ND | |
| 2015-06-08 | ND | |
| 2015-07-13 | ND | |
| 2015-08-03 | ND | |
| 2015-10-20 | ND | |
| 2016-01-12 | 8410-011216-001S | ND |
| 2016-02-15 | 8410-021516-E15S | ND |
| 2016-04-04 | 8410-040416-001S | ND |
| 2016-04-04 | 8410-040416-014S | ND |
| 2016-05-09 | 8410-050916-E15S | ND |
| 2016-08-02 | 8410-080216-001S | ND |
| 2016-08-02 | 8410-080216-014S | ND |
| 2017-01-09 | 8410-010917-011S | ND |
| 2017-01-09 | 8410-010917-003S | ND |
| 2017-01-09 | 8410-010917-008S | ND |
| 2017-01-09 | 8410-010917-005S | ND |
| 2017-01-09 | 8410-010917-006S | ND |
| 2017-01-17 | 8410-011717-002S | ND |
| 2017-01-23 | 8410-012317-004S | ND |
| 2017-01-23 | 8410-012317-009S | ND |
| 2017-04-03 | 8410-040317-002S | ND |
| 2017-04-04 | 8410-040417-003S | ND |
| 2017-04-10 | 8410-041017-004S | ND |
| 2017-04-10 | 8410-041017-005S | ND |
| 2017-04-10 | 8410-041017-009S | ND |
| 2017-04-10 | 8410-041017-011S | ND |
| 2017-04-17 | 8410-041717-006S | ND |
| 2017-04-17 | 8410-041717-008S | ND |
| 2017-07-10 | 8410-071017-011S | ND |
| 2017-10-02 | 8410-100217-011S | ND |
| 2018-01-08 | 8410-010818-011S | ND |
| 2018-02-12 | 8410-021218-012S | ND |
| 2018-04-02 | 8410-040218-011S | ND |
| 2018-04-02 | 8410-040218-012S | ND |
| 2018-04-02 | 8410-040218-013S | ND |
| 2018-07-02 | 8410-070218-011S | ND |
| 2018-07-09 | 8410-070918-013S | ND |
| 2018-11-20 | 8410-112018-011S | ND |
| 2019-02-04 | 8410-020419-011S | ND |
| 2019-02-04 | 8410A-020419-E15 | ND |
| 2019-04-02 | 8410-040219-001S | ND |
| 2019-04-15 | 8410-041519-014S | ND |
| 2019-05-07 | 8410-050719-E15S | ND |
| 2019-05-13 | 8410-051319-011S | ND |
| 2019-08-12 | 8410-081219-011S | ND |
| 2019-08-13 | 8410-081319-014S | ND |
| 2019-08-13 | 8410-081319-001S | ND |
| 2019-11-04 | 8410-110419-011S | ND |