2,4,5-TP (Silvex)
United Wappinger Water Improvement District
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.
31
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 | 13 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | ND | 6 | 0 | ND |
| 2017 | ND | 5 | 0 | ND |
| 2018 | ND | 1 | 0 | ND |
| 2019 | ND | 6 | 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 |
|---|---|---|
| 2014-12-09 | 12101426-W3 | ND |
| 2014-12-09 | 12101426 | ND |
| 2014-12-09 | 12101426-W6 | ND |
| 2014-12-09 | 12101426H | ND |
| 2014-12-09 | 12101426-W4 | ND |
| 2014-12-09 | 12101426C | ND |
| 2014-12-09 | 12101426-W5 | ND |
| 2014-12-09 | 12101426-W1 | ND |
| 2014-12-09 | 12101426E | ND |
| 2014-12-09 | 12101426A | ND |
| 2014-12-09 | 12101427A | ND |
| 2014-12-09 | 12101427 | ND |
| 2014-12-09 | 12101427C | ND |
| 2016-07-12 | UW161556 | ND |
| 2016-07-12 | UW161551 | ND |
| 2016-07-12 | UW161553 | ND |
| 2016-07-12 | UW161555 | ND |
| 2016-07-12 | UW161552 | ND |
| 2016-07-12 | UW161554 | ND |
| 2017-11-28 | UW172961S | ND |
| 2017-11-28 | UW172959K | ND |
| 2017-11-28 | UW172963S | ND |
| 2017-11-28 | UW172958K | ND |
| 2017-11-28 | UW172962S | ND |
| 2018-01-03 | UW180033K | ND |
| 2019-06-18 | UW191367K | ND |
| 2019-06-18 | J9F1283-01 | ND |
| 2019-06-18 | J9F1285-01 | ND |
| 2019-06-18 | J9F1290-01 | ND |
| 2019-06-18 | UW191368K | ND |
| 2019-06-18 | J9F1287-01 | ND |