2,4,5-TP (Silvex)
Connecticut Water Company - Northern Region-Western System
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.
45
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 | 2 | 0 | ND |
| 2015 | ND | 19 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 12 | 0 | ND |
| 2018 | ND | 4 | 0 | ND |
| 2019 | ND | 4 | 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 |
|---|---|---|
| 2014-03-20 | 140325CWCSOC2 | ND |
| 2014-05-07 | 6132SOC2 | ND |
| 2015-01-20 | 3173045 | ND |
| 2015-02-11 | 3185960 | ND |
| 2015-03-19 | 3210162 | ND |
| 2015-03-19 | 3210171 | ND |
| 2015-03-30 | 3216186 | ND |
| 2015-03-31 | 3216986 | ND |
| 2015-04-22 | 3230621 | ND |
| 2015-04-22 | 3230629 | ND |
| 2015-04-22 | 3230613 | ND |
| 2015-04-27 | 3231828 | ND |
| 2015-04-28 | 3232537 | ND |
| 2015-05-26 | 3249447 | ND |
| 2015-06-12 | BJ30561SOC2 | ND |
| 2015-07-01 | BJ40227SOC2 | ND |
| 2015-07-02 | BJ41078SOC2 | ND |
| 2015-07-30 | BJ65812SOC2 | ND |
| 2015-08-13 | BJ73997SOC2 | ND |
| 2015-08-21 | BJ79580SOC2 | ND |
| 2015-08-28 | BJ83828SOC2 | ND |
| 2016-01-27 | BK58056SOC2 | ND |
| 2016-01-27 | BK58055SOCR | ND |
| 2016-05-25 | BN40004SOC2 | ND |
| 2016-06-23 | BN62227SOC2 | ND |
| 2017-03-03 | BX79851SOC2 | ND |
| 2017-03-03 | BX79849SOC2 | ND |
| 2017-03-08 | BX81787SOCR | ND |
| 2017-04-06 | BY00572SOC2 | ND |
| 2017-04-21 | BY07960SOC2 | ND |
| 2017-04-21 | BY07962SOC2 | ND |
| 2017-05-30 | BY30818SOC2 | ND |
| 2017-06-01 | BY32097SOC2 | ND |
| 2017-07-07 | BY54443SOC2 | ND |
| 2017-07-14 | BY60158SOC2 | ND |
| 2017-07-27 | BY73973SOC2 | ND |
| 2017-08-11 | BY83260SOC2 | ND |
| 2018-01-31 | BZ82950SOC2 | ND |
| 2018-01-31 | BZ82691SOCR | ND |
| 2018-06-28 | CA80715SOC2 | ND |
| 2018-07-26 | CA99050 | ND |
| 2019-01-09 | SOC 200518249 | ND |
| 2019-01-10 | SOCR 200518412 | ND |
| 2019-01-10 | SOCR 200489130 | ND |
| 2019-03-11 | SOC 200524185 | ND |