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EWG's Tap Water Database — 2021 UPDATE

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1,1-Dichloroethylene

Grafton Waterworks

1,1-Dichloroethylene is used for plastics production. It damages DNA and causes cancer in laboratory animal studies.

MORE ABOUT THIS CONTAMINANT

 

152

Samples

21

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20142.26 ppb266ND - 18.0 ppb
20151.60 ppb248ND - 12.0 ppb
20162.18 ppb245ND - 15.0 ppb
20171.50 ppb247ND - 11.0 ppb
20181.91 ppb247ND - 14.0 ppb
20191.33 ppb3010ND - 10.00 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 7 ppb

The legal limit for 1,1-dichloroethylene, established in 1987, was based on a toxicity study conducted in laboratory animals in the 1980s.

ppb = parts per billion

All test results

Date Lab ID Result
2014-03-10773674ND
2014-03-10773668ND
2014-03-10773656ND
2014-03-10773671ND
2014-03-10773659ND
2014-03-1077366713.0 ppb
2014-04-07778332ND
2014-04-07778329ND
2014-04-07778325ND
2014-04-07778331ND
2014-04-07778326ND
2014-04-0777833018.0 ppb
2014-07-29806739ND
2014-07-29806744ND
2014-07-29806738ND
2014-07-29806742ND
2014-07-29806745ND
2014-07-298067460.350 ppb
2014-07-298067470.910 ppb
2014-07-2980674317.0 ppb
2014-12-15835979ND
2014-12-15835984ND
2014-12-15835978ND
2014-12-15835982ND
2014-12-15835985ND
2014-12-158359839.50 ppb
2015-03-04846466ND
2015-03-04846461ND
2015-03-04846449ND
2015-03-04846464ND
2015-03-04846451ND
2015-03-048464635.00 ppb
2015-05-26861799ND
2015-05-26861797ND
2015-05-26861792ND
2015-05-26861793ND
2015-05-268617981.000 ppb
2015-05-268617968.20 ppb
2015-09-08881969ND
2015-09-08881962ND
2015-09-08881963ND
2015-09-088819680.350 ppb
2015-09-098819670.420 ppb
2015-09-0988196612.0 ppb
2015-12-28899820ND
2015-12-28899818ND
2015-12-28899813ND
2015-12-28899814ND
2015-12-288998190.340 ppb
2015-12-2889981711.0 ppb
2016-03-16910611ND
2016-03-16910607ND
2016-03-16910599ND
2016-03-16910609ND
2016-03-16910601ND
2016-03-1691060615.0 ppb
2016-05-16921438ND
2016-05-16921436ND
2016-05-16921431ND
2016-05-16921432ND
2016-05-169214370.370 ppb
2016-05-1692143514.0 ppb
2016-08-31942867ND
2016-08-31942865ND
2016-08-31942860ND
2016-08-31942861ND
2016-08-3194286412.0 ppb
2016-09-01942866ND
2016-11-17960029ND
2016-11-17960027ND
2016-11-17960022ND
2016-11-17960028ND
2016-11-17960023ND
2016-11-1796002611.0 ppb
2017-03-15978080ND
2017-03-15978083ND
2017-03-15978086ND
2017-03-16978077ND
2017-03-16978073ND
2017-03-1697807611.0 ppb
2017-06-281001051ND
2017-06-281001048ND
2017-06-281001043ND
2017-06-281001050ND
2017-06-2810010478.10 ppb
2017-09-201019870ND
2017-09-201019868ND
2017-09-201019863ND
2017-09-201019869ND
2017-09-2010198710.260 ppb
2017-09-2010198720.700 ppb
2017-09-20101986711.0 ppb
2017-12-191034429ND
2017-12-191034427ND
2017-12-191034422ND
2017-12-191034423ND
2017-12-1910344281.60 ppb
2017-12-1910344263.30 ppb
2018-03-141045110ND
2018-03-141045108ND
2018-03-141045103ND
2018-03-141045109ND
2018-03-141045104ND
2018-03-14104510713.0 ppb
2018-06-191062396ND
2018-06-191062394ND
2018-06-191062389ND
2018-06-191062390ND
2018-06-1910623950.700 ppb
2018-09-171080756ND
2018-09-171080752ND
2018-09-171080753ND
2018-09-1710807583.00 ppb
2018-09-261083608ND
2018-09-2610836102.30 ppb
2018-09-26108360912.0 ppb
2018-11-261094376ND
2018-11-261094369ND
2018-11-261094370ND
2018-11-271094374ND
2018-11-2710943750.790 ppb
2018-11-27109437314.0 ppb
2019-03-181110136ND
2019-03-181110132ND
2019-03-181110134ND
2019-03-181110128ND
2019-03-1811101300.360 ppb
2019-03-1811101319.70 ppb
2019-04-171116388ND
2019-06-171128507ND
2019-06-171128505ND
2019-06-171128506ND
2019-06-171128501ND
2019-06-171128503ND
2019-06-1711285020.410 ppb
2019-06-17112850410.00 ppb
2019-09-241151017ND
2019-09-241151015ND
2019-09-241151011ND
2019-09-241151013ND
2019-09-2411510180.250 ppb
2019-09-2411510120.410 ppb
2019-09-2411510160.720 ppb
2019-09-2411510190.930 ppb
2019-09-2411510147.20 ppb
2019-12-101164883ND
2019-12-101164881ND
2019-12-101164882ND
2019-12-101164877ND
2019-12-101164879ND
2019-12-101164878ND
2019-12-10116488010.00 ppb