1,1-Dichloroethane
CTWC - Unionville System
NOTE: CTWC - Unionville System purchases water from Metropolitan District Commission which is required to test for 1,1-dichloroethane. Sample information shown below was taken by Metropolitan District Commission.
1,1-Dichloroethane is used in industrial chemical synthesis; in plastics, paint, varnish and finish removers; and as a pesticide. It can cause cancer.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | ND | 6 | 0 | ND |
| 2014 | ND | 6 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
| 2020 | ND | 5 | 0 | ND |
| 2021 | ND | 5 | 0 | ND |
| 2022 | ND | 4 | 0 | ND |
| 2023 | ND | 1 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 3 ppb
The EWG Health Guideline of 3 ppb for 1,1-dichloroethane 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 cancer.
ppb = parts per billion
All test results
NOTE: CTWC - Unionville System purchases water from Metropolitan District Commission which is required to test for 1,1-dichloroethane. Sample information shown below was taken by Metropolitan District Commission.
| Date | Lab ID | Result |
|---|---|---|
| 2013-07-17 | 201307180742AM | ND |
| 2013-07-17 | 201307180553AM | ND |
| 2013-07-17 | 201307180544AM | ND |
| 2013-10-09 | 201310100586AM | ND |
| 2013-10-09 | 201310100524AM | ND |
| 2013-10-09 | 201310100588AM | ND |
| 2014-01-07 | 201401080365AM | ND |
| 2014-01-07 | 201401080426AM | ND |
| 2014-01-07 | 201401080380AM | ND |
| 2014-04-08 | 201404090441AM | ND |
| 2014-04-08 | 201404090495AM | ND |
| 2014-04-08 | 201404090429AM | ND |
| 2018-07-16 | AE00927GE | ND |
| 2018-07-16 | AE00911GE | ND |
| 2018-07-16 | AE00912GE | ND |
| 2019-06-05 | AE29314GE | ND |
| 2019-06-05 | AE29313GE | ND |
| 2019-06-05 | AE29315GE | ND |
| 2020-06-02 | AE59301GE | ND |
| 2020-06-02 | AE59305GE | ND |
| 2020-06-02 | AE59302GE | ND |
| 2021-11-23 | V300107450 300107457 | ND |
| 2021-11-23 | V300107451 300107463 | ND |
| 2021-11-29 | V300109635 300109637 | ND |
| 2022-12-15 | V300287072 300287079 | ND |
| 2022-12-15 | V300287053 300287060 | ND |
| 2022-12-15 | V300287100 300287107 | ND |
| 2023-12-06 | V300456533 300456535 | ND |
| 2023-12-06 | V300456525 300456531 | ND |
| 2023-12-06 | V300456527 300456529 | ND |