cis-1,2-Dichloroethylene
Richland Township Water Authority
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.
22
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 | 5.10 ppb | 3 | 3 | 1.20 ppb - 7.10 ppb |
| 2015 | 5.37 ppb | 6 | 6 | 0.900 ppb - 7.80 ppb |
| 2016 | 5.50 ppb | 4 | 4 | 0.700 ppb - 9.60 ppb |
| 2017 | 4.06 ppb | 3 | 3 | 1.42 ppb - 7.26 ppb |
| 2018 | 6.27 ppb | 3 | 3 | 1.40 ppb - 11.3 ppb |
| 2019 | 2.87 ppb | 3 | 3 | 0.900 ppb - 6.20 ppb |
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 |
|---|---|---|
| 2014-05-15 | 14050658-02 | 7.10 ppb |
| 2014-05-15 | 14050658-01 | 1.20 ppb |
| 2014-09-25 | 14091904-01 | 7.00 ppb |
| 2015-02-10 | 12392454 | 4.60 ppb |
| 2015-04-23 | 12871965 | 0.900 ppb |
| 2015-04-23 | 12871966 | 7.00 ppb |
| 2015-06-09 | 12872153 | 5.20 ppb |
| 2015-09-28 | 13380546 | 7.80 ppb |
| 2015-12-08 | 13624262 | 6.70 ppb |
| 2016-02-16 | 13861549 | 5.40 ppb |
| 2016-03-15 | 13977438 | 6.30 ppb |
| 2016-04-12 | 14092299 | 9.60 ppb |
| 2016-04-12 | 14092278 | 0.700 ppb |
| 2017-09-11 | 16716485 | 7.26 ppb |
| 2017-09-11 | 16716508 | 3.51 ppb |
| 2017-09-11 | 16716458 | 1.42 ppb |
| 2018-10-15 | 8033560-01 | 1.40 ppb |
| 2018-10-15 | 8033560-02 | 11.3 ppb |
| 2018-10-15 | 8033560-03 | 6.10 ppb |
| 2019-10-07 | 9032226-01 | 0.900 ppb |
| 2019-10-07 | 9032226-02 | 6.20 ppb |
| 2019-10-07 | 9032226-03 | 1.50 ppb |