2,4,5-TP (Silvex)
Town of Hempstead 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.
48
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 | 12 | 0 | ND |
| 2016 | ND | 13 | 0 | ND |
| 2017 | ND | 9 | 0 | ND |
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 12 | 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 |
|---|---|---|
| 2015-01-01 | 111-SOCS | ND |
| 2015-01-22 | 1501D12-002-SOCS | ND |
| 2015-01-22 | 1501D12-001-SOCS | ND |
| 2015-03-30 | 1503K41-004 | ND |
| 2015-03-31 | 1503L25-004 | ND |
| 2015-03-31 | 1503L25-003 | ND |
| 2015-04-16 | 1504B81-001 | ND |
| 2015-04-16 | 1504B81-002 | ND |
| 2015-05-28 | 1505K11-001 | ND |
| 2015-05-28 | 1505K11-002 | ND |
| 2015-06-01 | 1506013-002 | ND |
| 2015-06-01 | 1506013-001 | ND |
| 2016-01-22 | 1601F36-001-SOC | ND |
| 2016-04-20 | 1604I765-002-SOC | ND |
| 2016-04-20 | 1604I76-001-SOC | ND |
| 2016-08-23 | 1608M27-003 | ND |
| 2016-08-23 | 1608M27-004 | ND |
| 2016-08-23 | 1608M270992 | ND |
| 2016-08-23 | 1608M27-002-SOCS | ND |
| 2016-08-24 | 1609N61-003 | ND |
| 2016-08-24 | 160861-004 | ND |
| 2016-08-30 | 1608R85-001 | ND |
| 2016-08-30 | 1608R85-002 | ND |
| 2016-09-23 | 1608M27-001 | ND |
| 2016-12-05 | 705998003 | ND |
| 2017-09-15 | 7030109004-SOC | ND |
| 2017-09-22 | 7030806001-SOC | ND |
| 2017-09-22 | 7030806004-SOC | ND |
| 2017-10-05 | 7032089003-SOC | ND |
| 2017-10-05 | 7032089004-SOC | ND |
| 2017-10-19 | 7033560004-SOC | ND |
| 2017-10-19 | 7033560002-SOC | ND |
| 2017-10-19 | 7033560001-POC | ND |
| 2017-10-19 | 7033560003-SOC | ND |
| 2018-07-31 | 7059937002-SOC | ND |
| 2018-07-31 | 7059937001-SOC | ND |
| 2019-01-31 | 7078041005 | ND |
| 2019-03-29 | 7083937002 | ND |
| 2019-03-29 | 7083937001 | ND |
| 2019-03-29 | 7083937004 | ND |
| 2019-03-29 | 7083937003 | ND |
| 2019-04-15 | 7085833002 | ND |
| 2019-04-15 | 7085833001 | ND |
| 2019-05-02 | 7087918001 | ND |
| 2019-05-02 | 7087918002 | ND |
| 2019-06-20 | 7094504001 | ND |
| 2019-06-20 | 7094504002 | ND |
| 2019-08-16 | 70101759001 | ND |