2,4,5-TP (Silvex)
Erie City Water Authority
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.
22
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 | 6 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 3 | 0 | ND |
| 2017 | ND | 3 | 0 | ND |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 3 | 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 |
|---|---|---|
| 2014-05-13 | 3024693 | ND |
| 2014-05-13 | 3024693 | ND |
| 2014-08-19 | 3086009 | ND |
| 2014-08-19 | 3086009 | ND |
| 2014-09-23 | 3109571 | ND |
| 2014-09-23 | 3109571 | ND |
| 2015-04-15 | 12963010 | ND |
| 2015-05-06 | 13585682 | ND |
| 2015-08-18 | 13341580 | ND |
| 2015-09-17 | 13585753 | ND |
| 2016-05-24 | 14507036 | ND |
| 2016-07-20 | 14841807 | ND |
| 2016-08-23 | 15015300 | ND |
| 2017-05-16 | 16355452 | ND |
| 2017-07-13 | 16506479 | ND |
| 2017-09-20 | 16822146 | ND |
| 2018-01-08 | 3849221 | ND |
| 2018-05-21 | 3941481 | ND |
| 2018-08-21 | 4030518 | ND |
| 2019-05-21 | 4302825 | ND |
| 2019-09-10 | 4415509 | ND |
| 2019-11-18 | 4489105 | ND |