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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

City of Dunn

Bromoform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromoform 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)

43

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.02 ppb1611ND - 3.10 ppb
20152.04 ppb168ND - 7.80 ppb
20160.400 ppb164ND - 2.00 ppb
20177.67 ppb168ND - 22.0 ppb
20180.338 ppb164ND - 1.50 ppb
20191.47 ppb168ND - 4.70 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.5 ppb

The EWG Health Guideline of 0.5 ppb for bromoform was proposed in 2018 by the California Office of Environmental Health Hazard Assessment as 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
2014-02-18C315794-02ND
2014-02-18C315794-03ND
2014-02-18C315794-04ND
2014-02-18C315794-010.700 ppb
2014-05-13C402465-010.620 ppb
2014-05-13C402465-020.800 ppb
2014-05-13C402465-030.810 ppb
2014-05-13C402465-040.750 ppb
2014-08-14C406838-011.80 ppb
2014-08-14C406838-021.50 ppb
2014-08-14C406838-031.80 ppb
2014-08-14C406838-042.00 ppb
2014-11-17C411109-033.10 ppb
2014-11-17C411109-042.50 ppb
2014-11-17C411109-02ND
2014-11-17C411109-01ND
2015-02-181.60 ppb
2015-02-181.70 ppb
2015-02-181.40 ppb
2015-02-181.10 ppb
2015-05-11ND
2015-05-11ND
2015-05-11ND
2015-05-11ND
2015-08-137.40 ppb
2015-08-135.80 ppb
2015-08-137.80 ppb
2015-08-135.90 ppb
2015-11-17ND
2015-11-17ND
2015-11-17ND
2015-11-17ND
2016-02-17C515215-01ND
2016-02-17C515215-02ND
2016-02-17C515215-03ND
2016-02-17C515215-04ND
2016-05-17CZ02416-04ND
2016-05-17CZ02416-03ND
2016-05-17CZ02416-02ND
2016-05-17CZ02416-01ND
2016-08-16CZ07775-011.80 ppb
2016-08-16CZ07775-021.10 ppb
2016-08-16CZ07775-032.00 ppb
2016-08-16CZ07775-041.50 ppb
2016-11-08CZ13539-01ND
2016-11-08CZ13539-02ND
2016-11-08CZ13539-03ND
2016-11-08CZ13539-04ND
2017-02-08CZ18607-01ND
2017-02-08CZ18607-04ND
2017-02-08CZ18607-02ND
2017-02-08CZ18607-03ND
2017-05-09CA04318-01ND
2017-05-09CA04318-02ND
2017-05-09CA04318-03ND
2017-05-09CA04318-04ND
2017-08-07CA08144-048.60 ppb
2017-08-07CA08144-036.80 ppb
2017-08-07CA08144-0210.00 ppb
2017-08-07CA08144-019.30 ppb
2017-11-07CA13634-0122.0 ppb
2017-11-07CA13634-0222.0 ppb
2017-11-07CA13634-0322.0 ppb
2017-11-07CA13634-0422.0 ppb
2018-02-14CA18867-04 ND
2018-02-14CA18867-03 ND
2018-02-14CA18867-02RE1 ND
2018-02-14CA18867-01 ND
2018-05-15CB03025-04 1.40 ppb
2018-05-15CB03025-01 1.30 ppb
2018-05-15CB03025-02 1.20 ppb
2018-05-15CB03025-03 1.50 ppb
2018-08-15CB07937-04 ND
2018-08-15CB07937-03 ND
2018-08-15CB07937-02 ND
2018-08-15CB07937-01 ND
2018-11-14CB12929-01 ND
2018-11-14CB12929-02 ND
2018-11-14CB12929-03 ND
2018-11-14CB12929-04 ND
2019-02-12CB18573-01RE1 ND
2019-02-12CB18573-02RE1 ND
2019-02-12CB18573-03RE1 ND
2019-02-12CB18573-04RE1 ND
2019-05-08CC02824-01 ND
2019-05-08CC02824-04 ND
2019-05-08CC02824-03 ND
2019-05-08CC02824-02 ND
2019-08-128365-081219-B02M4.60 ppb
2019-08-128365-081219-B04M4.70 ppb
2019-08-128365-081219-B03M4.40 ppb
2019-08-128365-081219-B01M4.00 ppb
2019-11-138365B-111319-B021.30 ppb
2019-11-138365-111319-B04M1.60 ppb
2019-11-138365-111319-B03M1.60 ppb
2019-11-138365-111319-B01M1.30 ppb