cis-1,2-Dichloroethylene
North Castle Water District #1
NOTE: North Castle Water District #1 purchases water from White Plains City which is required to test for cis-1,2-dichloroethylene. Sample information shown below was taken by White Plains City.
1,2-Dichloroethylene, a neurotoxic solvent, exists in two different forms: trans-1,2-dichloroethylene and cis-1,2-dichloroethylene. A mixture of the two forms is used to manufacture other solvents and chemical products.
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 | 3 | 0 | ND |
| 2021 | ND | 3 | 0 | ND |
| 2022 | ND | 5 | 0 | ND |
| 2023 | ND | 3 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EPA Maximum Contaminant
Level (MCL): 70 ppb
The legal limit for cis-1,2-dichloroethylene, established in 1991, was based on a toxicity study in laboratory animals conducted in the 1980s.
ppb = parts per billion
All test results
NOTE: North Castle Water District #1 purchases water from White Plains City which is required to test for cis-1,2-dichloroethylene. Sample information shown below was taken by White Plains City.
| Date | Lab ID | Result |
|---|---|---|
| 2018-09-24 | AU20758 POCS | ND |
| 2019-11-12 | AV23849 POCS | ND |
| 2020-03-17 | AW05444-POCS | ND |
| 2020-03-17 | AW05446-POCS | ND |
| 2020-03-17 | AW05448-POCS | ND |
| 2020-08-06 | AW15047-POCS | ND |
| 2020-11-09 | AW21630-POCS | ND |
| 2021-02-23 | AX03555-POCS | ND |
| 2021-02-23 | AX03551-POCS | ND |
| 2021-02-23 | AX03553-POCS | ND |
| 2021-07-08 | AX13365-POCS | ND |
| 2021-09-20 | AX19183-WP-POCS | ND |
| 2022-02-15 | AY02773-POCS | ND |
| 2022-02-15 | AY02769-POCS | ND |
| 2022-02-15 | AY02771-POCS | ND |
| 2022-09-12 | AY16285-POCS | ND |
| 2022-10-24 | AY19121-WP-POCS | ND |
| 2023-02-14 | AZ02824-POCS | ND |
| 2023-02-14 | AZ02821-POCS | ND |
| 2023-02-14 | AZ02826-POCS | ND |
| 2023-07-10 | AZ12311-POCS | ND |
| 2023-10-19 | AZ19383-POCS-WP | ND |