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EWG's Tap Water Database — 2021 UPDATE

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cis-1,2-Dichloroethylene

Grafton Waterworks

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

 

156

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.750 ppb2611ND - 5.00 ppb
20150.688 ppb2611ND - 3.70 ppb
20160.890 ppb2610ND - 5.00 ppb
20170.742 ppb249ND - 4.90 ppb
20180.827 ppb248ND - 4.90 ppb
20190.745 ppb3014ND - 3.60 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
2014-03-10773674ND
2014-03-10773656ND
2014-03-10773659ND
2014-03-107736680.200 ppb
2014-03-107736710.350 ppb
2014-03-107736673.30 ppb
2014-04-07778332ND
2014-04-07778325ND
2014-04-07778326ND
2014-04-077783290.280 ppb
2014-04-077783310.730 ppb
2014-04-077783305.00 ppb
2014-07-29806739ND
2014-07-29806744ND
2014-07-29806738ND
2014-07-29806742ND
2014-07-29806745ND
2014-07-298067460.480 ppb
2014-07-298067471.20 ppb
2014-07-298067434.70 ppb
2014-12-15835979ND
2014-12-15835978ND
2014-12-15835982ND
2014-12-15835985ND
2014-12-158359840.770 ppb
2014-12-158359832.50 ppb
2015-03-04846466ND
2015-03-04846461ND
2015-03-04846449ND
2015-03-04846451ND
2015-03-048464640.750 ppb
2015-03-048464631.70 ppb
2015-05-26861799ND
2015-05-26861792ND
2015-05-26861793ND
2015-05-268617970.180 ppb
2015-05-268617981.30 ppb
2015-05-268617962.70 ppb
2015-09-08881969ND
2015-09-08881962ND
2015-09-08881963ND
2015-09-088819681.20 ppb
2015-09-09881967ND
2015-09-098819700.670 ppb
2015-09-098819711.40 ppb
2015-09-098819663.70 ppb
2015-12-28899820ND
2015-12-28899818ND
2015-12-28899813ND
2015-12-28899814ND
2015-12-288998190.690 ppb
2015-12-288998173.60 ppb
2016-03-16910611ND
2016-03-16910607ND
2016-03-16910599ND
2016-03-16910601ND
2016-03-169106090.560 ppb
2016-03-169106065.00 ppb
2016-05-16921438ND
2016-05-16921436ND
2016-05-16921431ND
2016-05-16921432ND
2016-05-169214370.490 ppb
2016-05-169214353.70 ppb
2016-08-31942867ND
2016-08-31942865ND
2016-08-31942860ND
2016-08-31942861ND
2016-08-319428644.30 ppb
2016-09-019428661.10 ppb
2016-09-019428691.30 ppb
2016-09-019428701.80 ppb
2016-11-17960029ND
2016-11-17960027ND
2016-11-17960022ND
2016-11-17960023ND
2016-11-179600281.10 ppb
2016-11-179600263.80 ppb
2017-03-15978080ND
2017-03-15978083ND
2017-03-15978086ND
2017-03-16978077ND
2017-03-169780730.690 ppb
2017-03-169780763.60 ppb
2017-06-281001051ND
2017-06-281001048ND
2017-06-281001043ND
2017-06-2810010500.690 ppb
2017-06-2810010472.50 ppb
2017-09-201019870ND
2017-09-201019868ND
2017-09-201019863ND
2017-09-201019869ND
2017-09-2010198710.550 ppb
2017-09-2010198721.50 ppb
2017-09-2010198674.90 ppb
2017-12-191034429ND
2017-12-191034427ND
2017-12-191034422ND
2017-12-191034423ND
2017-12-1910344280.770 ppb
2017-12-1910344262.60 ppb
2018-03-141045110ND
2018-03-141045108ND
2018-03-141045103ND
2018-03-141045104ND
2018-03-1410451091.20 ppb
2018-03-1410451074.60 ppb
2018-06-191062396ND
2018-06-191062394ND
2018-06-191062389ND
2018-06-191062390ND
2018-06-1910623950.950 ppb
2018-09-171080756ND
2018-09-171080752ND
2018-09-171080753ND
2018-09-1710807581.90 ppb
2018-09-261083608ND
2018-09-2610836101.90 ppb
2018-09-2610836093.40 ppb
2018-11-261094376ND
2018-11-261094369ND
2018-11-261094370ND
2018-11-271094374ND
2018-11-2710943751.000 ppb
2018-11-2710943734.90 ppb
2019-03-181110136ND
2019-03-181110132ND
2019-03-181110128ND
2019-03-1811101340.500 ppb
2019-03-1811101301.10 ppb
2019-03-1811101313.40 ppb
2019-04-171116388ND
2019-06-171128507ND
2019-06-171128505ND
2019-06-171128501ND
2019-06-171128503ND
2019-06-1711285060.740 ppb
2019-06-1711285021.20 ppb
2019-06-1711285043.60 ppb
2019-09-241151017ND
2019-09-241151015ND
2019-09-241151011ND
2019-09-241151013ND
2019-09-2411510180.400 ppb
2019-09-2411510121.10 ppb
2019-09-2411510161.20 ppb
2019-09-2411510191.50 ppb
2019-09-2411510143.20 ppb
2019-12-101164883ND
2019-12-101164881ND
2019-12-101164877ND
2019-12-101164879ND
2019-12-1011648820.520 ppb
2019-12-1011648780.690 ppb
2019-12-1011648803.20 ppb