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EWG's Tap Water Database — 2021 UPDATE

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Dichloroacetic acid

Elizabeth City

Dichloroacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

MORE ABOUT THIS CONTAMINANT

 

96

Samples

0

Samples exceeding legal limit (MCL)

92

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201411.0 ppb1615ND - 27.0 ppb
201511.4 ppb1614ND - 27.0 ppb
201610.0 ppb16161.80 ppb - 27.0 ppb
201711.8 ppb1615ND - 23.0 ppb
201817.8 ppb16162.00 ppb - 29.0 ppb
201914.6 ppb16161.000 ppb - 25.0 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.2 ppb

The EWG Health Guideline of 0.2 ppb for dichloroacetic acid was proposed in 2020 by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk.a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

ppb = parts per billion

All test results

Date Lab ID Result
2014-01-0692185427002-217.0 ppb
2014-01-0692185427001-22.70 ppb
2014-01-0692185427004-22.40 ppb
2014-01-0692185427003-217.0 ppb
2014-04-0792196508001DIS-217.0 ppb
2014-04-0792196511001DIS-217.0 ppb
2014-04-0792196509001DIS-213.0 ppb
2014-04-0792196510001DIS-216.0 ppb
2014-07-0892208495001DIS-23.10 ppb
2014-07-0892208495002DIS-217.0 ppb
2014-07-0892208495003DIS-2ND
2014-07-0892208495004DIS-213.0 ppb
2014-10-0692220286001TTH-24.90 ppb
2014-10-0692220286002TTH-27.30 ppb
2014-10-0692220286003TTH-227.0 ppb
2014-10-0692220286004TTH-21.10 ppb
2015-01-085.40 ppb
2015-01-081.50 ppb
2015-01-0825.0 ppb
2015-01-082.70 ppb
2015-04-066.80 ppb
2015-04-0622.0 ppb
2015-04-0618.0 ppb
2015-04-0619.0 ppb
2015-07-06ND
2015-07-066.30 ppb
2015-07-065.10 ppb
2015-07-0627.0 ppb
2015-10-056.90 ppb
2015-10-0511.0 ppb
2015-10-0525.0 ppb
2015-10-05ND
2016-01-0592282037001TTH-211.0 ppb
2016-01-0592282037002TTH-28.40 ppb
2016-01-0592282037003TTH-227.0 ppb
2016-01-0592282037004TTH-22.00 ppb
2016-04-0592292662002TTH-29.50 ppb
2016-04-0592292662004TTH-210.00 ppb
2016-04-0592292662003TTH-215.0 ppb
2016-04-0592292662001TTH-25.00 ppb
2016-07-1192304772001TTH-24.20 ppb
2016-07-1192304772002TTH-212.0 ppb
2016-07-1192304772003TTH-217.0 ppb
2016-07-1192304772004TTH-26.80 ppb
2016-10-1292315997004TTH-21.80 ppb
2016-10-1292315997003TTH-219.0 ppb
2016-10-1292315997002TTH-28.70 ppb
2016-10-1292315997001TTH-23.10 ppb
2017-01-1092325930003TTH23.0 ppb
2017-01-1092325930002TTH12.0 ppb
2017-01-1092325930001TTH8.60 ppb
2017-01-1092325930004TTH21.0 ppb
2017-04-1092336747001TTH15.0 ppb
2017-04-1092336747002TTH22.0 ppb
2017-04-1092336747003TTH20.0 ppb
2017-04-1092336747004TTH9.50 ppb
2017-07-1092347220003TTH3.20 ppb
2017-07-1092347220004TTH2.20 ppb
2017-07-1092347220002TTH6.50 ppb
2017-07-1092347220001TTH18.0 ppb
2017-10-1092358707001TTH3.20 ppb
2017-10-1092358707002TTH7.10 ppb
2017-10-1092358707003TTH18.0 ppb
2017-10-1092358707004TTHND
2018-01-2492370843004TTH 18.0 ppb
2018-01-2492370843003TTH 17.0 ppb
2018-01-2492370843002TTH 24.0 ppb
2018-01-2492370843001TTH 17.0 ppb
2018-04-2592382473004TTH 15.0 ppb
2018-04-2592382473001TTH 14.0 ppb
2018-04-2592382473002TTH 21.0 ppb
2018-04-2592382473003TTH 29.0 ppb
2018-07-1992392766004TTH 2.50 ppb
2018-07-1992392766003TTH 21.0 ppb
2018-07-1992392766002TTH 15.0 ppb
2018-07-3092393737001TTH 19.0 ppb
2018-10-1892404170001TTH 23.0 ppb
2018-10-1892404170002TTH 23.0 ppb
2018-10-1892404170003TTH 25.0 ppb
2018-10-1892404170004TTH 2.00 ppb
2019-01-0492412949001_377012.0 ppb
2019-01-0492412949002_377012.0 ppb
2019-01-0492412949003_377020.0 ppb
2019-01-0492412949004_37704.10 ppb
2019-04-1592425913001_377015.0 ppb
2019-04-1592425913004_377011.0 ppb
2019-04-1592425913003_377025.0 ppb
2019-04-1592425913002_377021.0 ppb
2019-07-1592436885002_377016.0 ppb
2019-07-1592436885004_37703.10 ppb
2019-07-1592436885003_377023.0 ppb
2019-07-1592436885001_377025.0 ppb
2019-10-1492449575004_37701.000 ppb
2019-10-1492449575003_377019.0 ppb
2019-10-1492449575002_37709.10 ppb
2019-10-1492449575001_377018.0 ppb