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EWG's Tap Water Database — 2021 UPDATE

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Dibromoacetic acid

Norwalk Water Department

Dibromoacetic 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

 

176

Samples

0

Samples exceeding legal limit (MCL)

115

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20141.31 ppb169ND - 3.40 ppb
20151.84 ppb3222ND - 5.40 ppb
20160.528 ppb3212ND - 1.90 ppb
20172.68 ppb3222ND - 7.80 ppb
20181.66 ppb3230ND - 4.00 ppb
20191.22 ppb3220ND - 3.40 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.04 ppb

The EWG Health Guideline of 0.04 ppb for dibromoacetic acid was defined in a peer-reviewed scientific study by EWG and represents a on-in-a-million lifetime cancer risk level. This health guideline protects against cancer.

ppb = parts per billion

All test results

Date Lab ID Result
2014-02-043761-800-0910ND
2014-02-043761-801-08153.20 ppb
2014-02-043761-802-0857ND
2014-02-043761-803-0844ND
2014-02-043761-804-10102.40 ppb
2014-02-043761-805-09502.40 ppb
2014-02-043761-806-09351.50 ppb
2014-02-043761-807-0830ND
2014-08-123761-800-0925ND
2014-08-123761-801-08353.40 ppb
2014-08-123761-802-09131.10 ppb
2014-08-123761-803-09001.70 ppb
2014-08-123761-804-10203.40 ppb
2014-08-123761-805-1000ND
2014-08-123761-806-09401.80 ppb
2014-08-123761-807-0850ND
2015-01-273761-800-09353.10 ppb
2015-01-273761-801-09002.90 ppb
2015-01-273761-802-09503.10 ppb
2015-01-273761-803-09203.80 ppb
2015-01-273761-804-10353.10 ppb
2015-01-273761-805-10152.50 ppb
2015-01-273761-806-10001.90 ppb
2015-01-273761-807-11003.40 ppb
2015-05-053761-800-09152.10 ppb
2015-05-053761-801-08203.90 ppb
2015-05-053761-802-09051.50 ppb
2015-05-053761-803-08401.50 ppb
2015-05-053761-804-10053.60 ppb
2015-05-053761-805-09451.10 ppb
2015-05-053761-806-0930ND
2015-05-053761-807-0850ND
2015-08-113761-800-09102.30 ppb
2015-08-113761-801-08005.30 ppb
2015-08-113761-802-08551.40 ppb
2015-08-113761-803-08261.60 ppb
2015-08-113761-804-09502.90 ppb
2015-08-113761-805-09351.10 ppb
2015-08-113761-806-0926ND
2015-08-113761-807-0840ND
2015-11-033761-800-1030ND
2015-11-033761-801-08155.40 ppb
2015-11-033761-802-1018ND
2015-11-033761-803-08501.50 ppb
2015-11-033761-804-1000ND
2015-11-033761-805-0940ND
2015-11-033761-806-0920ND
2015-11-033761-807-0830ND
2016-02-023761-800-08451.40 ppb
2016-02-023761-801-0755ND
2016-02-023761-802-0830ND
2016-02-023761-803-08101.000 ppb
2016-02-023761-804-0940ND
2016-02-023761-805-0920ND
2016-02-023761-806-0900ND
2016-02-023761-807-1000ND
2016-05-033761-800-1100ND
2016-05-033761-801-09211.90 ppb
2016-05-033761-802-1045ND
2016-05-033761-803-10101.20 ppb
2016-05-033761-804-12481.30 ppb
2016-05-033761-805-1230ND
2016-05-033761-806-1121ND
2016-05-033761-807-1027ND
2016-08-023761-800-08351.30 ppb
2016-08-023761-801-08201.30 ppb
2016-08-023761-802-0850ND
2016-08-023761-803-07501.20 ppb
2016-08-023761-804-10051.20 ppb
2016-08-023761-805-0945ND
2016-08-023761-806-0920ND
2016-08-023761-807-0805ND
2016-11-013761-800-0900ND
2016-11-013761-801-08051.60 ppb
2016-11-013761-802-0915ND
2016-11-013761-803-0830ND
2016-11-013761-804-1030ND
2016-11-013761-805-10001.60 ppb
2016-11-013761-806-09351.90 ppb
2016-11-013761-807-0845ND
2017-02-143761-800-09006.00 ppb
2017-02-143761-801-08057.80 ppb
2017-02-143761-802-09206.20 ppb
2017-02-143761-803-08451.10 ppb
2017-02-143761-804-10255.40 ppb
2017-02-143761-805-10051.000 ppb
2017-02-143761-806-0940ND
2017-02-143761-807-0825ND
2017-05-093761-800-09103.40 ppb
2017-05-093761-801-07405.20 ppb
2017-05-093761-802-11403.30 ppb
2017-05-093761-803-0810ND
2017-05-093761-804-11182.10 ppb
2017-05-093761-805-1050ND
2017-05-093761-806-0925ND
2017-05-093761-807-0845ND
2017-08-083761-800-09005.60 ppb
2017-08-083761-801-08005.70 ppb
2017-08-083761-802-09205.40 ppb
2017-08-083761-803-08401.50 ppb
2017-08-083761-804-09355.80 ppb
2017-08-083761-805-1000ND
2017-08-083761-806-10251.40 ppb
2017-08-083761-807-0830ND
2017-11-143761-800-08253.90 ppb
2017-11-143761-801-07304.30 ppb
2017-11-143761-802-09004.40 ppb
2017-11-143761-803-08101.30 ppb
2017-11-143761-804-10003.80 ppb
2017-11-143761-805-09401.20 ppb
2017-11-143761-806-0920ND
2017-11-143761-807-0750ND
2018-02-063761-800-09353.50 ppb
2018-02-063761-801-08404.00 ppb
2018-02-063761-802-09503.70 ppb
2018-02-063761-803-09151.70 ppb
2018-02-063761-804-10503.70 ppb
2018-02-063761-805-10302.00 ppb
2018-02-063761-806-10101.10 ppb
2018-02-063761-807-09001.000 ppb
2018-05-013761-800-10261.10 ppb
2018-05-013761-801-10051.70 ppb
2018-05-013761-802-10371.10 ppb
2018-05-013761-803-13501.50 ppb
2018-05-013761-804-13001.30 ppb
2018-05-013761-805-1245ND
2018-05-013761-806-11171.10 ppb
2018-05-013761-807-1410ND
2018-08-073761-800-10231.70 ppb
2018-08-073761-801-08421.90 ppb
2018-08-073761-802-12451.70 ppb
2018-08-073761-803-09361.30 ppb
2018-08-073761-804-12251.80 ppb
2018-08-073761-805-12001.10 ppb
2018-08-073761-806-10481.30 ppb
2018-08-073761-807-13101.10 ppb
2018-11-063761-800-09101.70 ppb
2018-11-063761-801-08002.10 ppb
2018-11-063761-802-08551.90 ppb
2018-11-063761-803-08351.50 ppb
2018-11-063761-804-10051.70 ppb
2018-11-063761-805-09471.60 ppb
2018-11-063761-806-09301.30 ppb
2018-11-063761-807-08201.000 ppb
2019-02-053761-800-09221.50 ppb
2019-02-053761-801-08301.90 ppb
2019-02-053761-802-09401.40 ppb
2019-02-053761-803-0910ND
2019-02-053761-804-10361.40 ppb
2019-02-053761-805-1021ND
2019-02-053761-806-1000ND
2019-02-053761-807-0856ND
2019-05-073761-800-08352.30 ppb
2019-05-073761-801-07302.50 ppb
2019-05-073761-802-08502.00 ppb
2019-05-073761-803-0755ND
2019-05-073761-804-09502.10 ppb
2019-05-073761-805-09321.000 ppb
2019-05-073761-806-0915ND
2019-05-073761-807-0810ND
2019-08-063761-800-08503.20 ppb
2019-08-063761-801-07543.20 ppb
2019-08-063761-802-09163.10 ppb
2019-08-063761-803-08331.10 ppb
2019-08-063761-804-10253.40 ppb
2019-08-063761-805-1000ND
2019-08-063761-806-0940ND
2019-08-063761-807-0820ND
2019-11-053761-800-09301.30 ppb
2019-11-053761-801-08302.30 ppb
2019-11-053761-802-09451.40 ppb
2019-11-053761-803-0850ND
2019-11-053761-804-10551.50 ppb
2019-11-053761-805-10301.20 ppb
2019-11-053761-806-10051.20 ppb
2019-11-053761-807-0910ND