Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

cis-1,2-Dichloroethylene

California Domestic Water Company

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.

MORE ABOUT THIS CONTAMINANT

 

282

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.65 ppb3019ND - 5.40 ppb
20151.40 ppb3019ND - 6.00 ppb
20161.17 ppb4422ND - 6.50 ppb
20170.986 ppb5224ND - 3.70 ppb
20180.838 ppb5026ND - 4.00 ppb
20191.19 ppb7647ND - 4.80 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
2014-01-089588-005-09003.80 ppb
2014-01-089588-006-09250.980 ppb
2014-01-089588-007-09352.70 ppb
2014-03-219588-014-0910ND
2014-04-073761-004-0854ND
2014-04-073761-005-09393.20 ppb
2014-04-073761-006-09030.960 ppb
2014-04-073761-007-09211.90 ppb
2014-04-073761-008-0815ND
2014-04-073761-009-0735ND
2014-04-073761-014-1025ND
2014-04-099588-004-1120ND
2014-04-099588-005-11154.10 ppb
2014-04-099588-006-11401.40 ppb
2014-04-099588-007-11302.10 ppb
2014-04-099588-008-1150ND
2014-04-093761-020-07215.40 ppb
2014-07-099588-005-08553.90 ppb
2014-07-099588-006-09150.680 ppb
2014-07-099588-007-09253.80 ppb
2014-10-029588-005-09003.20 ppb
2014-10-029588-006-09200.570 ppb
2014-10-029588-007-09304.10 ppb
2014-10-063761-004-0855ND
2014-10-063761-005-10242.90 ppb
2014-10-063761-006-09430.660 ppb
2014-10-063761-007-10003.00 ppb
2014-10-063761-008-0837ND
2014-10-063761-009-0750ND
2014-12-153761-014-0945ND
2015-01-079588-005-09102.70 ppb
2015-01-079588-006-09200.830 ppb
2015-01-079588-007-09304.10 ppb
2015-01-079588-014-0905ND
2015-04-063761-004-0850ND
2015-04-063761-005-05552.60 ppb
2015-04-063761-006-07431.000 ppb
2015-04-063761-007-07572.80 ppb
2015-04-063761-008-0730ND
2015-04-063761-009-0525ND
2015-04-063761-014-0700ND
2015-04-149588-004-0855ND
2015-04-149588-006-09450.880 ppb
2015-04-149588-007-09554.50 ppb
2015-04-149588-008-0935ND
2015-04-159588-005-09152.40 ppb
2015-07-139588-005-09002.50 ppb
2015-07-139588-006-09450.630 ppb
2015-07-139588-007-09551.60 ppb
2015-10-053761-004-0809ND
2015-10-053761-005-09431.80 ppb
2015-10-053761-006-08400.620 ppb
2015-10-053761-007-09211.70 ppb
2015-10-053761-008-0902ND
2015-10-053761-009-0725ND
2015-10-053761-014-1029ND
2015-10-129588-005-08553.00 ppb
2015-10-129588-006-09101.10 ppb
2015-10-129588-007-09151.30 ppb
2015-11-199588-020-10556.00 ppb
2016-01-079588-006-09051.10 ppb
2016-01-079588-007-0915ND
2016-03-289588-005-09253.00 ppb
2016-04-043761-004-0915ND
2016-04-043761-005-10303.10 ppb
2016-04-043761-006-10150.980 ppb
2016-04-043761-007-09582.40 ppb
2016-04-043761-008-0852ND
2016-04-043761-009-0745ND
2016-04-043761-014-11400.640 ppb
2016-04-119588-004-0935ND
2016-04-119588-005-08502.80 ppb
2016-04-119588-006-09101.10 ppb
2016-04-119588-007-0915ND
2016-04-119588-008-0950ND
2016-04-119588-014-08450.510 ppb
2016-06-063761-009-0755ND
2016-06-063761-013-09002.20 ppb
2016-06-063761-020-11451.10 ppb
2016-07-053761-009-0730ND
2016-07-069588-005-08503.60 ppb
2016-07-069588-006-09350.960 ppb
2016-07-069588-007-0930ND
2016-07-069588-020-09102.40 ppb
2016-07-113761-009-0803ND
2016-08-013761-009-0723ND
2016-09-063761-009-0755ND
2016-09-139588-014-1035ND
2016-10-033761-004-0829ND
2016-10-033761-005-09483.60 ppb
2016-10-033761-006-09031.000 ppb
2016-10-033761-007-09241.90 ppb
2016-10-033761-008-0813ND
2016-10-033761-009-0729ND
2016-10-033761-014-1107ND
2016-10-033761-020-10046.00 ppb
2016-10-149588-005-09102.60 ppb
2016-10-149588-006-09550.650 ppb
2016-10-149588-007-10003.40 ppb
2016-10-149588-014-0915ND
2016-10-149588-020-09256.50 ppb
2016-11-073761-009-0730ND
2016-11-213761-009-0755ND
2016-12-053761-009-0730ND
2017-01-033761-009-0710ND
2017-01-093761-009-0805ND
2017-01-109588-005-09152.20 ppb
2017-01-109588-006-09200.740 ppb
2017-01-109588-007-09251.80 ppb
2017-01-109588-014-0900ND
2017-01-109588-020-09103.70 ppb
2017-02-083761-009-0736ND
2017-03-063761-009-0741ND
2017-04-033761-009-0748ND
2017-04-059588-004-0920ND
2017-04-059588-005-09051.90 ppb
2017-04-059588-006-09300.590 ppb
2017-04-059588-007-09403.00 ppb
2017-04-059588-008-0955ND
2017-04-059588-014-0900ND
2017-04-059588-020-09103.40 ppb
2017-04-193761-004-0910ND
2017-04-193761-005-08372.50 ppb
2017-04-193761-006-08190.600 ppb
2017-04-193761-007-08092.70 ppb
2017-04-193761-008-0957ND
2017-04-193761-009-0935ND
2017-04-193761-014-0857ND
2017-04-193761-020-08503.30 ppb
2017-05-013761-009-0445ND
2017-06-053761-009-0740ND
2017-07-053761-009-0740ND
2017-07-189588-005-09502.50 ppb
2017-07-189588-006-09350.620 ppb
2017-07-189588-007-09253.20 ppb
2017-07-189588-014-1010ND
2017-07-189588-020-10002.90 ppb
2017-08-073761-009-0738ND
2017-09-053761-009-0752ND
2017-09-263761-009-0930ND
2017-10-023761-004-0837ND
2017-10-023761-005-09192.80 ppb
2017-10-023761-006-10030.600 ppb
2017-10-023761-007-09402.80 ppb
2017-10-023761-008-0815ND
2017-10-023761-009-0729ND
2017-10-023761-014-1115ND
2017-10-023761-020-10203.00 ppb
2017-10-109588-005-09052.70 ppb
2017-10-109588-006-09250.640 ppb
2017-10-109588-007-09102.50 ppb
2017-10-109588-014-0850ND
2017-10-109588-020-09350.570 ppb
2017-11-063761-009-0728ND
2017-11-133761-009-0745ND
2017-12-043761-009-0738ND
2018-01-023761-009-0736ND
2018-01-089588-005-09052.90 ppb
2018-01-089588-006-09250.670 ppb
2018-01-089588-007-0930ND
2018-01-089588-014-0900ND
2018-01-089588-020-09051.000 ppb
2018-02-053761-009-0725ND
2018-03-053761-009-0748ND
2018-04-023761-004-0900ND
2018-04-023761-007-1018ND
2018-04-023761-008-0931ND
2018-04-023761-009-0757ND
2018-04-109588-004-0850ND
2018-04-109588-005-09002.30 ppb
2018-04-109588-006-09150.610 ppb
2018-04-109588-007-0920ND
2018-04-109588-008-0930ND
2018-04-109588-014-09450.510 ppb
2018-04-109588-020-09050.740 ppb
2018-04-233761-005-10223.10 ppb
2018-04-233761-006-1002ND
2018-04-233761-007-0953ND
2018-04-233761-014-1042ND
2018-04-233761-020-10131.40 ppb
2018-05-073761-009-07200.750 ppb
2018-05-083761-009-10480.520 ppb
2018-06-043761-009-0746ND
2018-07-023761-009-0758ND
2018-07-119588-005-08302.20 ppb
2018-07-119588-006-09300.580 ppb
2018-07-119588-007-09352.50 ppb
2018-07-119588-014-10051.30 ppb
2018-07-119588-020-08454.00 ppb
2018-08-063761-009-0725ND
2018-09-043761-009-0810ND
2018-10-013761-005-10292.40 ppb
2018-10-013761-006-09580.710 ppb
2018-10-013761-007-09402.10 ppb
2018-10-013761-008-0822ND
2018-10-013761-009-0740ND
2018-10-013761-014-11270.690 ppb
2018-10-013761-020-10152.40 ppb
2018-10-043761-004-0815ND
2018-10-099588-005-09202.20 ppb
2018-10-099588-006-10100.730 ppb
2018-10-099588-007-10151.30 ppb
2018-10-099588-014-09300.870 ppb
2018-10-099588-020-09103.40 ppb
2018-11-053761-009-0750ND
2018-12-033761-009-0730ND
2019-01-083761-009-0758ND
2019-01-109588-005-09001.90 ppb
2019-01-109588-006-09400.680 ppb
2019-01-109588-007-09450.970 ppb
2019-01-109588-014-0910ND
2019-01-109588-020-09054.80 ppb
2019-02-043761-009-0742ND
2019-03-043761-009-0749ND
2019-04-013761-005-11312.20 ppb
2019-04-013761-006-09560.890 ppb
2019-04-013761-007-09411.20 ppb
2019-04-013761-008-0840ND
2019-04-013761-009-0814ND
2019-04-013761-014-1125ND
2019-04-013761-020-11152.40 ppb
2019-04-039588-005-08502.10 ppb
2019-04-039588-006-09150.860 ppb
2019-04-039588-007-09100.990 ppb
2019-04-039588-008-0925ND
2019-04-039588-014-0905ND
2019-04-039588-020-09002.30 ppb
2019-04-083761-004-0920ND
2019-05-063761-009-0615ND
2019-06-033761-009-0755ND
2019-06-069588-004-1100ND
2019-07-013761-009-0723ND
2019-07-013761-013-09051.30 ppb
2019-07-089588-005-08102.80 ppb
2019-07-089588-006-08450.700 ppb
2019-07-089588-007-0905ND
2019-07-083761-013-08421.70 ppb
2019-07-089588-014-0825ND
2019-07-089588-020-09101.90 ppb
2019-07-153761-013-09202.60 ppb
2019-07-293761-013-09002.70 ppb
2019-08-053761-009-0750ND
2019-08-053761-013-09102.00 ppb
2019-08-123761-013-09003.50 ppb
2019-08-263761-013-08532.00 ppb
2019-09-033761-009-0947ND
2019-09-033761-013-05521.70 ppb
2019-09-093761-013-08552.10 ppb
2019-09-163761-013-0902ND
2019-09-231233-013-09281.50 ppb
2019-09-303761-013-06251.60 ppb
2019-10-073761-004-0919ND
2019-10-079588-005-08302.80 ppb
2019-10-079588-006-08450.680 ppb
2019-10-073761-006-11180.820 ppb
2019-10-079588-007-0850ND
2019-10-073761-007-1130ND
2019-10-073761-008-0843ND
2019-10-073761-009-0800ND
2019-10-073761-011-0938ND
2019-10-073761-012-0943ND
2019-10-073761-013-09331.50 ppb
2019-10-079588-014-08250.760 ppb
2019-10-073761-014-09580.970 ppb
2019-10-073761-017-0948ND
2019-10-099588-020-09504.60 ppb
2019-10-143761-013-09151.90 ppb
2019-10-213761-013-09281.50 ppb
2019-10-253761-005-07173.80 ppb
2019-10-253761-020-07264.00 ppb
2019-10-283761-013-08302.20 ppb
2019-11-043761-009-0752ND
2019-11-083761-013-10301.40 ppb
2019-11-113761-013-08401.80 ppb
2019-11-183761-013-08521.80 ppb
2019-11-253761-013-08321.70 ppb
2019-12-023761-009-0752ND
2019-12-023761-013-09061.70 ppb
2019-12-093761-013-08211.50 ppb
2019-12-163761-013-08421.70 ppb
2019-12-233761-013-08142.30 ppb
2019-12-303761-013-09171.40 ppb