2,4,5-TP (Silvex)
City of Scottsdale
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.
44
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 | 21 | 0 | ND |
| 2015 | ND | 3 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | ND | 20 | 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 |
|---|---|---|
| 2014-02-05 | 4020547-04S | ND |
| 2014-02-05 | 4020547-03S | ND |
| 2014-02-05 | 4020547-02S | ND |
| 2014-02-05 | 4020547-01 | ND |
| 2014-02-11 | 4020994-01 | ND |
| 2014-02-12 | 4020997-01S | ND |
| 2014-02-13 | 4021207-02S | ND |
| 2014-02-13 | 4021207-01S | ND |
| 2014-03-13 | 4031189-01S | ND |
| 2014-06-03 | 4060399-01 | ND |
| 2014-08-05 | 4080531-01 | ND |
| 2014-08-05 | 4080527-01 | ND |
| 2014-08-05 | 4080529-01 | ND |
| 2014-08-07 | 4080785-03 | ND |
| 2014-08-07 | 4080785-02 | ND |
| 2014-08-07 | 4080785-01 | ND |
| 2014-08-14 | 4081396-01 | ND |
| 2014-08-21 | 4081971-01 | ND |
| 2014-08-26 | 4082445-01 | ND |
| 2014-08-27 | 4082450-01 | ND |
| 2014-11-10 | 201411100040S | ND |
| 2015-01-26 | 5012122-01 | ND |
| 2015-06-15 | 201506150242S | ND |
| 2015-07-28 | 201507290355S | ND |
| 2017-01-23 | 201701230480S | ND |
| 2017-01-31 | 201701310419S | ND |
| 2017-01-31 | 201701310415S | ND |
| 2017-03-13 | 201703130443S | ND |
| 2017-04-11 | 201704121085S | ND |
| 2017-04-18 | 201704180733S | ND |
| 2017-05-03 | 201705030393S | ND |
| 2017-05-03 | 201705030386S | ND |
| 2017-05-11 | 201705110565S | ND |
| 2017-05-25 | 201705250273S | ND |
| 2017-08-09 | 201708090677S | ND |
| 2017-10-02 | 201710020518S | ND |
| 2017-10-10 | 201710100211S | ND |
| 2017-10-10 | 201710100207S | ND |
| 2017-10-23 | 201710230327S | ND |
| 2017-10-31 | 201711010965S | ND |
| 2017-10-31 | 201711010947S | ND |
| 2017-11-01 | 201711010961S | ND |
| 2017-11-01 | 201711010957S | ND |
| 2017-11-09 | 201711090343S | ND |