1,1,1,2-Tetrachloroethane
Ruth Water District
NOTE: Ruth Water District purchases water from Ely Municipal Water Department which is required to test for 1,1,1,2-tetrachloroethane. Sample information shown below was taken by Ely Municipal Water Department.
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 | 5 | 0 | ND |
| 2015 | ND | 1 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 1 | 0 | ND |
| 2019 | ND | 4 | 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: Ruth Water District purchases water from Ely Municipal Water Department which is required to test for 1,1,1,2-tetrachloroethane. Sample information shown below was taken by Ely Municipal Water Department.
| Date | Lab ID | Result |
|---|---|---|
| 2014-02-18 | 1402384-002 | ND |
| 2014-02-18 | 1402384-001 | ND |
| 2014-04-15 | 1404372-001 | ND |
| 2014-04-15 | 1404372-002 | ND |
| 2014-12-16 | 1412517-001 | ND |
| 2015-03-11 | 1503401-003 | ND |
| 2016-09-08 | 6I13035-04V | ND |
| 2016-09-08 | 6I13035-01 | ND |
| 2016-09-08 | 6I13035-02 | ND |
| 2016-09-08 | 6I13035-03 | ND |
| 2018-11-08 | 18110223-007 | ND |
| 2019-11-14 | 19110404-002 | ND |
| 2019-11-14 | 19110404-003 | ND |
| 2019-11-14 | 19110404-005 | ND |
| 2019-11-21 | 19110631-001 | ND |