2,4,5-TP (Silvex)
Town of Princess Anne
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.
11
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 | 1 | 0 | ND |
| 2016 | ND | 5 | 0 | ND |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 5 | 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 |
|---|---|---|
| 2015-09-22 | E16001238001 | ND |
| 2016-03-30 | E16003648002 | ND |
| 2016-03-30 | E16003648004 | ND |
| 2016-08-05 | E17000501002 | ND |
| 2016-08-05 | E17000501005 | ND |
| 2016-10-19 | E17001766001 | ND |
| 2019-03-15 | E19002956001 | ND |
| 2019-03-15 | E19002959001 | ND |
| 2019-03-15 | E19002958001 | ND |
| 2019-03-15 | E19002957001 | ND |
| 2019-09-20 | E20001164001 | ND |