cis-1,2-Dichloroethylene
Mountain View Mobile Estates LLC
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.
25
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | 0.503 ppb | 4 | 3 | ND - 0.730 ppb |
| 2019 | 0.793 ppb | 4 | 4 | 0.630 ppb - 0.970 ppb |
| 2020 | 0.508 ppb | 4 | 3 | ND - 0.750 ppb |
| 2021 | 0.870 ppb | 3 | 3 | 0.760 ppb - 0.960 ppb |
| 2022 | 0.597 ppb | 6 | 4 | ND - 1.000 ppb |
| 2023 | 0.640 ppb | 4 | 3 | ND - 1.10 ppb |
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
| Date | Lab ID | Result |
|---|---|---|
| 2018-02-21 | CA4900798_002_002-201802211045 | 0.700 ppb |
| 2018-05-15 | CA4900798_002_002-201805151050 | 0.730 ppb |
| 2018-08-15 | CA4900798_002_002-201808151030 | 0.580 ppb |
| 2018-11-07 | CA4900798_002_002-201811071020 | ND |
| 2019-02-13 | CA4900798_002_002-201902131020 | 0.800 ppb |
| 2019-05-08 | CA4900798_002_002-201905081045 | 0.970 ppb |
| 2019-08-14 | CA4900798_002_002-201908141005 | 0.630 ppb |
| 2019-11-13 | CA4900798_002_002-201911131100 | 0.770 ppb |
| 2020-02-10 | CA4900798_002_002-202002101110 | 0.580 ppb |
| 2020-05-11 | CA4900798_002_002-202005111025 | 0.750 ppb |
| 2020-08-10 | CA4900798_002_002-202008101045 | ND |
| 2020-11-11 | CA4900798_002_002-202011111025 | 0.700 ppb |
| 2021-02-03 | CA4900798_002_002-202102031000 | 0.960 ppb |
| 2021-05-05 | CA4900798_002_002-202105051015 | 0.760 ppb |
| 2021-11-10 | CA4900798_002_002-202111101016 | 0.890 ppb |
| 2022-02-07 | CA4900798_002_002-202202071012 | 0.740 ppb |
| 2022-04-29 | CA4900798_004_004-202204290920 | ND |
| 2022-04-29 | CA4900798_006_006-202204290920 | ND |
| 2022-05-03 | CA4900798_002_002-202205031020 | 0.940 ppb |
| 2022-08-09 | CA4900798_002_002-202208091033 | 1.000 ppb |
| 2022-11-09 | CA4900798_002_002-202211091450 | 0.900 ppb |
| 2023-02-28 | CA4900798_002_002-202302281150 | 0.790 ppb |
| 2023-05-24 | CA4900798_002_002-202305241000 | 1.10 ppb |
| 2023-11-14 | CA4900798_004_004-202311141540 | ND |
| 2023-11-14 | CA4900798_002_002-202311141540 | 0.670 ppb |