2,4,5-TP (Silvex)
Doylestown Borough 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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | ND | 15 | 0 | ND |
2015 | N/A | 0 | 0 | N/A |
2016 | N/A | 0 | 0 | N/A |
2017 | ND | 9 | 0 | ND |
2018 | N/A | 0 | 0 | N/A |
2019 | N/A | 0 | 0 | N/A |
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 |
---|---|---|
2014-02-25 | L4943098-1 | ND |
2014-02-25 | L4943098-5 | ND |
2014-02-25 | L4943098-2 | ND |
2014-02-25 | L4943098-3 | ND |
2014-02-25 | L4943098-4 | ND |
2014-04-29 | L4980180-1 | ND |
2014-04-29 | L4980180-2 | ND |
2014-04-29 | L4980180-5 | ND |
2014-04-29 | L4980180-3 | ND |
2014-04-29 | L4980180-4 | ND |
2014-08-26 | L5114559-5 | ND |
2014-08-26 | L5114559-1 | ND |
2014-08-26 | L5114559-4 | ND |
2014-08-26 | L5114559-3 | ND |
2014-08-26 | L5114559-2 | ND |
2017-01-16 | 15782466 | ND |
2017-01-16 | 15503193 | ND |
2017-01-16 | 15782535 | ND |
2017-01-16 | 15503261 | ND |
2017-01-16 | 15782431 | ND |
2017-01-16 | 15503158 | ND |
2017-01-16 | 15782500 | ND |
2017-01-16 | 15503227 | ND |
2017-01-18 | 16399719 | ND |