2,4,5-TP (Silvex)
Lexington & Joseph Harp Correctional Institution
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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | ND | 1 | 0 | ND |
| 2019 | ND | 30 | 0 | ND |
| 2020 | ND | 7 | 0 | ND |
| 2021 | ND | 9 | 0 | ND |
| 2022 | ND | 4 | 0 | ND |
| 2023 | N/A | 0 | 0 | N/A |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
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 |
|---|---|---|
| 2018-02-27 | SDWA-1240279-00 | ND |
| 2019-01-15 | SDWA-1340138-00 | ND |
| 2019-01-15 | SDWA-1340139-00 | ND |
| 2019-01-15 | SDWA-1340140-00 | ND |
| 2019-01-15 | SDWA-1340142-00 | ND |
| 2019-01-15 | SDWA-1340143-00 | ND |
| 2019-01-15 | SDWA-1340141-00 | ND |
| 2019-02-26 | SDWA-1342977-00 | ND |
| 2019-02-26 | SDWA-1342976-00 | ND |
| 2019-02-26 | SDWA-1342975-00 | ND |
| 2019-02-26 | SDWA-1342974-00 | ND |
| 2019-02-26 | SDWA-1342973-00 | ND |
| 2019-02-26 | SDWA-1342972-00 | ND |
| 2019-05-06 | SDWA-1367730-00 | ND |
| 2019-05-06 | SDWA-1367733-00 | ND |
| 2019-05-06 | SDWA-1367732-00 | ND |
| 2019-05-06 | SDWA-1367731-00 | ND |
| 2019-05-06 | SDWA-1367729-00 | ND |
| 2019-05-06 | SDWA-1367728-00 | ND |
| 2019-08-13 | SDWA-1402245-00 | ND |
| 2019-08-13 | SDWA-1402244-00 | ND |
| 2019-08-13 | SDWA-1402243-00 | ND |
| 2019-08-13 | SDWA-1402242-00 | ND |
| 2019-08-13 | SDWA-1402241-00 | ND |
| 2019-08-13 | SDWA-1402240-00 | ND |
| 2019-11-06 | SDWA-1433599-00 | ND |
| 2019-11-06 | SDWA-1433603-00 | ND |
| 2019-11-06 | SDWA-1433602-00 | ND |
| 2019-11-06 | SDWA-1433601-00 | ND |
| 2019-11-06 | SDWA-1433600-00 | ND |
| 2019-11-06 | SDWA-1433604-00 | ND |
| 2020-02-11 | SDWA-1456207-00 | ND |
| 2020-02-11 | SDWA-1456208-00 | ND |
| 2020-02-11 | SDWA-1456206-00 | ND |
| 2020-02-11 | SDWA-1456205-00 | ND |
| 2020-02-11 | SDWA-1456204-00 | ND |
| 2020-02-11 | SDWA-1456203-00 | ND |
| 2020-09-22 | SDWA-1491817-00 | ND |
| 2021-02-08 | SDWA-1531164-00 | ND |
| 2021-02-24 | SDWA-1549477-00 | ND |
| 2021-02-24 | SDWA-1549483-00 | ND |
| 2021-02-24 | SDWA-1549487-00 | ND |
| 2021-02-24 | SDWA-1549491-00 | ND |
| 2021-02-24 | SDWA-1549495-00 | ND |
| 2021-05-18 | SDWA-1578131-00 | ND |
| 2021-09-13 | SDWA-1603804-00 | ND |
| 2021-10-25 | SDWA-1640319-00 | ND |
| 2022-03-21 | SDWA-1671219-00 | ND |
| 2022-03-21 | SDWA-1671229-00 | ND |
| 2022-03-21 | SDWA-1671235-00 | ND |
| 2022-03-21 | SDWA-1671241-00 | ND |