2,4,5-TP (Silvex)
Middletown 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.
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 | 6 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 1 | 0 | ND |
| 2018 | ND | 5 | 0 | ND |
| 2019 | ND | 1 | 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 |
|---|---|---|
| 2014-06-09 | SOCR 200397425 | ND |
| 2015-05-14 | SOCR 200416851 | ND |
| 2015-05-26 | SOC 200417361 | ND |
| 2015-05-26 | SOC 200417362 | ND |
| 2015-09-24 | SOC 200425624 | ND |
| 2015-09-28 | SOC 200425711 | ND |
| 2015-12-08 | SOC 200430161 | ND |
| 2016-06-21 | SOC1 200442795 | ND |
| 2017-06-27 | SOCR 200470496 | ND |
| 2018-03-01 | SOCR 200489003 | ND |
| 2018-03-28 | SOC 200490769 | ND |
| 2018-04-16 | SOC 200492153 | ND |
| 2018-08-07 | SOC 200501550 | ND |
| 2018-08-07 | SOC 200501551 | ND |
| 2019-05-21 | SOCR 200533085 | ND |