1,1,1,2-Tetrachloroethane
Larchmont Village
NOTE: Larchmont Village purchases water from Westchester Joint Water Works which is required to test for 1,1,1,2-tetrachloroethane. Sample information shown below was taken by Westchester Joint Water Works.
1,1,1,2-Tetrachloroethane is a synthetic chemical used in metal degreasing and as an intermediate in industrial chemical production.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | ND | 3 | 0 | ND |
| 2015 | ND | 3 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 1 ppb
The EWG Health Guideline of 1 ppb for 1,1,1,2-tetrachloroethane was defined by the Environmental Protection Agency as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.
ppb = parts per billion
All test results
NOTE: Larchmont Village purchases water from Westchester Joint Water Works which is required to test for 1,1,1,2-tetrachloroethane. Sample information shown below was taken by Westchester Joint Water Works.
| Date | Lab ID | Result |
|---|---|---|
| 2014-03-17 | AQ04609POC | ND |
| 2014-10-23 | AQ22037POC | ND |
| 2014-12-01 | AQ2601POC | ND |
| 2015-10-27 | AR23195POC | ND |
| 2015-10-27 | AR23193POC | ND |
| 2015-10-27 | AR23194POC | ND |
| 2016-09-06 | AS19150POC WJWW | ND |
| 2017-11-13 | AT23824POC-WJWW | ND |
| 2017-11-13 | AT23822POC-WJWW | ND |
| 2018-02-21 | AU03660POCS | ND |
| 2018-09-24 | AU20757WJWWPOCS | ND |
| 2018-10-24 | AU23144POCS | ND |
| 2019-10-21 | AV22258POCS | ND |
| 2019-11-12 | AV23850WJWW-POCS | ND |