2,4,5-TP (Silvex)
Breezy Hill WD
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.
39
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 4 | 0 | ND |
| 2015 | ND | 16 | 0 | ND |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 3 | 0 | ND |
| 2018 | ND | 13 | 0 | ND |
| 2019 | ND | 1 | 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 |
|---|---|---|
| 2014-01-08 | AD34134 | ND |
| 2014-04-08 | AD38188 | ND |
| 2014-08-13 | AD43964 | ND |
| 2014-10-22 | AD47073 | ND |
| 2015-02-11 | AD51431 | ND |
| 2015-02-11 | AD51432 | ND |
| 2015-02-11 | AD51435 | ND |
| 2015-02-11 | AD51437 | ND |
| 2015-04-08 | AD53966 | ND |
| 2015-04-08 | AD53971 | ND |
| 2015-04-08 | AD53969 | ND |
| 2015-04-08 | AD53951 | ND |
| 2015-04-08 | AD53949 | ND |
| 2015-04-08 | AD53943 | ND |
| 2015-07-15 | AD58288 | ND |
| 2015-07-15 | AD58291 | ND |
| 2015-07-15 | AD58294 | ND |
| 2015-07-15 | AD58300 | ND |
| 2015-07-15 | AD58302 | ND |
| 2015-11-03 | AD64927 | ND |
| 2016-02-03 | AD70130 | ND |
| 2016-04-06 | AD73811 | ND |
| 2017-03-08 | AD90840 | ND |
| 2017-06-13 | AD95883 | ND |
| 2017-10-24 | AE02465 | ND |
| 2018-02-28 | AE08441 | ND |
| 2018-02-28 | AE08439 | ND |
| 2018-02-28 | AE08431 | ND |
| 2018-02-28 | AE08417 | ND |
| 2018-02-28 | AE08415 | ND |
| 2018-02-28 | AE08397 | ND |
| 2018-02-28 | AE08403 | ND |
| 2018-03-06 | AE08910 | ND |
| 2018-03-06 | AE08908 | ND |
| 2018-03-06 | AE08896 | ND |
| 2018-03-06 | AE08912 | ND |
| 2018-03-06 | AE08894 | ND |
| 2018-03-06 | AE08892 | ND |
| 2019-01-09 | AE23798 | ND |