1,1-Dichloroethylene
Redhill Water Association
NOTE: Redhill Water Association purchases water from Alma Waterworks which is required to test for 1,1-dichloroethylene. Sample information shown below was taken by Alma Waterworks.
1,1-Dichloroethylene is used for plastics production. It damages DNA and causes cancer in laboratory animal studies.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | ND | 1 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
| 2020 | ND | 5 | 0 | ND |
| 2021 | ND | 5 | 0 | ND |
| 2022 | ND | 4 | 0 | ND |
| 2023 | ND | 4 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EPA Maximum Contaminant
Level (MCL): 7 ppb
The legal limit for 1,1-dichloroethylene, established in 1987, was based on a toxicity study conducted in laboratory animals in the 1980s.
ppb = parts per billion
All test results
NOTE: Redhill Water Association purchases water from Alma Waterworks which is required to test for 1,1-dichloroethylene. Sample information shown below was taken by Alma Waterworks.
| Date | Lab ID | Result |
|---|---|---|
| 2018-01-01 | 18004012709 | ND |
| 2019-02-05 | 19038001501 | ND |
| 2020-01-07 | 20009017401 | ND |
| 2020-04-13 | 20107011508 | ND |
| 2020-07-08 | 20191012409 | ND |
| 2020-11-02 | 20310000709 | ND |
| 2021-01-19 | 21021001907 | ND |
| 2021-04-06 | 21098014201 | ND |
| 2022-04-04 | O196531-VOC-1 | ND |
| 2023-04-10 | O207795-VOC-1 | ND |