cis-1,2-Dichloroethylene
Hillcrest Water District
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.
70
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 |
|---|---|---|---|---|
| 2014 | 1.76 ppb | 13 | 2 | ND - 22.0 ppb |
| 2015 | 3.54 ppb | 10 | 4 | ND - 21.0 ppb |
| 2016 | 2.46 ppb | 15 | 3 | ND - 24.0 ppb |
| 2017 | 4.07 ppb | 16 | 5 | ND - 21.0 ppb |
| 2018 | 3.23 ppb | 11 | 3 | ND - 23.0 ppb |
| 2019 | ND | 5 | 0 | ND |
ppb = parts per billion
State and national drinking water standards and health guidelines
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 |
|---|---|---|
| 2014-02-11 | BG08458POC | 22.0 ppb |
| 2014-02-11 | BG08457POC | ND |
| 2014-02-11 | BG08459POC | ND |
| 2014-02-11 | BG08460 | ND |
| 2014-05-07 | BG41839POC | 0.840 ppb |
| 2014-05-07 | BG41840POC | ND |
| 2014-05-07 | BG41841POC | ND |
| 2014-05-07 | BG41842POC | ND |
| 2014-08-06 | BG89225POC | ND |
| 2014-11-06 | BH37477 | ND |
| 2014-11-06 | BH37476POCS | ND |
| 2014-11-06 | BH37474POCS | ND |
| 2014-11-06 | BH37475POCS | ND |
| 2015-02-12 | BH73135 | ND |
| 2015-02-12 | BH73137 | ND |
| 2015-02-12 | BH73134 | 0.820 ppb |
| 2015-05-13 | BJ16340 | ND |
| 2015-05-13 | BJ16339POCS | ND |
| 2015-05-13 | BJ16338POCS | ND |
| 2015-08-12 | BJ73766POCS | 13.0 ppb |
| 2015-08-12 | BJ73768POCS | ND |
| 2015-08-12 | BJ73767POCS | 21.0 ppb |
| 2015-08-12 | BJ73765POCS | 0.550 ppb |
| 2016-02-10 | BK63950POCS | ND |
| 2016-02-10 | BK63949POCS | ND |
| 2016-02-10 | BK63948PIOCS | ND |
| 2016-02-10 | BK63951POCS | ND |
| 2016-05-18 | BN35055POCS | ND |
| 2016-05-18 | BN35053POCS | 12.0 ppb |
| 2016-05-18 | BN35054POCS | 24.0 ppb |
| 2016-06-01 | BN45270POCS | 0.940 ppb |
| 2016-08-17 | BN94010POCS | ND |
| 2016-08-17 | BN940027POCS | ND |
| 2016-08-17 | BN94009POCS | ND |
| 2016-08-17 | BN94008POCS | ND |
| 2016-11-10 | BV83350POCS | ND |
| 2016-11-10 | BV83351POCS | ND |
| 2016-11-15 | BV83352POCS | ND |
| 2017-02-07 | BX70856POCS | ND |
| 2017-02-17 | BX70859POCS | ND |
| 2017-02-17 | BX70858POCS | 20.0 ppb |
| 2017-02-17 | BX70857POCS | 11.0 ppb |
| 2017-05-04 | BY15302POCS | ND |
| 2017-05-04 | BY15300 | 13.0 ppb |
| 2017-05-04 | BY15299POCS | 0.0730 ppb |
| 2017-05-04 | BY15301POCS | 21.0 ppb |
| 2017-08-03 | BY78076POCS | ND |
| 2017-08-03 | BY78077POCS | ND |
| 2017-08-03 | BY78078POCS | ND |
| 2017-08-03 | BY78075POCS | ND |
| 2017-11-06 | BZ33103POCS | ND |
| 2017-11-06 | BZ33104POCS | ND |
| 2017-11-06 | BZ33105POCS | ND |
| 2017-11-06 | BZ33102POCS | ND |
| 2018-02-15 | BZ90402POCS | 23.0 ppb |
| 2018-02-15 | BZ90400POCS | 0.520 ppb |
| 2018-02-15 | BZ90401POCS | 12.0 ppb |
| 2018-02-15 | BZ90403POCS | ND |
| 2018-05-10 | CA44944POCS | ND |
| 2018-05-10 | CA44945POCS | ND |
| 2018-05-10 | CA44947POCS | ND |
| 2018-05-10 | CA44946POCS | ND |
| 2018-08-24 | CB18711POCS | ND |
| 2018-08-24 | CB18710POCS | ND |
| 2018-11-27 | CC03591POCS | ND |
| 2019-02-20 | CC55434POCS | ND |
| 2019-05-15 | CD15020POCS | ND |
| 2019-08-19 | CD87714POCS | ND |
| 2019-11-07 | CE56416POCS | ND |
| 2019-11-19 | CE63530POCS | ND |