2,4,5-TP (Silvex)
CTWC - Naugatuck Region-Central 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.
16
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 | 1 | 0 | ND |
| 2015 | ND | 5 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 7 | 0 | ND |
| 2018 | ND | 1 | 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 |
|---|---|---|
| 2014-01-15 | 513SOC2 | ND |
| 2015-01-29 | 3178716 | ND |
| 2015-04-27 | 3231844 | ND |
| 2015-04-27 | 3231818 | ND |
| 2015-05-27 | 3250234 | ND |
| 2015-11-30 | BK28941SOCR | ND |
| 2016-05-23 | BN37340SOCR | ND |
| 2017-03-13 | BX86685SOCR | ND |
| 2017-08-29 | BY92209SOC2 | ND |
| 2017-08-29 | BY92211SOC2 | ND |
| 2017-08-29 | BY92210SOC2 | ND |
| 2017-11-15 | BZ42124SOC2 | ND |
| 2017-11-15 | BZ42123SOC2 | ND |
| 2017-11-15 | BZ42121SOC2 | ND |
| 2018-04-10 | CA17351SOCR | ND |
| 2019-01-28 | SOCR 200519834 | ND |