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EWG's Tap Water Database — 2021 UPDATE

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Dichloroacetic acid

Roswell Municipal Water System

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

 

94

Samples

0

Samples exceeding legal limit (MCL)

12

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.0481 ppb164ND - 0.220 ppb
20150.0706 ppb165ND - 0.310 ppb
20160.00938 ppb161ND - 0.150 ppb
2017ND160ND
2018ND140ND
20190.311 ppb169ND - 0.680 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
2014-02-192014005813ND
2014-02-192014005814ND
2014-02-192014005815ND
2014-02-1920140058120.200 ppb
2014-04-222014013877ND
2014-04-222014013874ND
2014-04-222014013875ND
2014-04-222014013876ND
2014-07-242014023527ND
2014-07-242014023525ND
2014-07-242014023528ND
2014-07-2420140235260.170 ppb
2014-10-2220140332880.220 ppb
2014-10-2220140332860.180 ppb
2014-10-222014033285ND
2014-10-222014033287ND
2015-01-202015002207ND
2015-01-202015002208ND
2015-01-202015002205ND
2015-01-202015002206ND
2015-04-142015011526ND
2015-04-142015011523ND
2015-04-142015011524ND
2015-04-142015011525ND
2015-07-1420150204390.170 ppb
2015-07-142015020440ND
2015-07-142015020438ND
2015-07-1420150204410.180 ppb
2015-10-2720150322630.310 ppb
2015-10-2720150322610.280 ppb
2015-10-2720150322640.190 ppb
2015-10-272015032262ND
2016-01-262016002558ND
2016-01-262016002556ND
2016-01-262016002557ND
2016-01-2720160025550.150 ppb
2016-04-202016011292ND
2016-04-202016011291ND
2016-04-202016011289ND
2016-04-202016011290ND
2016-07-252016021230ND
2016-07-252016021229ND
2016-07-252016021228ND
2016-07-252016021227ND
2016-10-172016030145ND
2016-10-172016030146ND
2016-10-172016030143ND
2016-10-172016030144ND
2017-01-172017001366ND
2017-01-172017001367ND
2017-01-172017001368ND
2017-01-172017001369ND
2017-04-172017011267ND
2017-04-172017011268ND
2017-04-172017011270ND
2017-04-172017011269ND
2017-07-252017021567ND
2017-07-252017021566ND
2017-07-252017021565ND
2017-07-252017021564ND
2017-10-262017030968ND
2017-10-262017030969ND
2017-10-262017030970ND
2017-10-262017030971ND
2018-01-182018001892ND
2018-01-182018001891ND
2018-01-182018001890ND
2018-04-052018009845ND
2018-04-052018009844ND
2018-04-052018009843ND
2018-07-022018018267ND
2018-07-022018018266ND
2018-07-022018018265ND
2018-07-022018018268ND
2018-10-092018028897ND
2018-10-092018028898ND
2018-10-092018028899ND
2018-10-092018028900ND
2019-01-0920190006810.600 ppb
2019-01-0920190006820.590 ppb
2019-01-0920190006830.570 ppb
2019-01-0920190006840.680 ppb
2019-04-0220190084790.390 ppb
2019-04-022019008480ND
2019-04-022019008481ND
2019-04-0220190084780.420 ppb
2019-07-0920190187270.600 ppb
2019-07-092019018730ND
2019-07-0920190187290.550 ppb
2019-07-0920190187280.580 ppb
2019-10-032019028342ND
2019-10-032019028341ND
2019-10-032019028340ND
2019-10-032019028339ND