Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Dibromochloromethane

Massachusetts Water Resources Authority (MWRA)

Dibromochloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Dibromochloromethane and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

 

488

Samples

0

Samples exceeding legal limit (MCL)

424

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.114 ppb245ND - 0.630 ppb
20130.170 ppb247ND - 0.650 ppb
20140.334 ppb2612ND - 0.960 ppb
20150.700 ppb154141ND - 1.38 ppb
20160.812 ppb130129ND - 1.09 ppb
20170.959 ppb1301300.630 ppb - 1.22 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for dibromochloromethane 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 Result
2012-01-09ND
2012-01-10ND
2012-03-05ND
2012-03-06ND
2012-04-02ND
2012-04-020.510 ppb
2012-05-07ND
2012-05-08ND
2012-06-04ND
2012-06-05ND
2012-07-09ND
2012-07-10ND
2012-08-06ND
2012-08-07ND
2012-09-100.550 ppb
2012-09-11ND
2012-10-010.630 ppb
2012-10-010.500 ppb
2012-10-02ND
2012-10-02ND
2012-11-050.550 ppb
2012-11-06ND
2012-12-03ND
2012-12-04ND
2013-01-07ND
2013-01-08ND
2013-02-04ND
2013-02-05ND
2013-03-04ND
2013-03-05ND
2013-04-010.600 ppb
2013-04-02ND
2013-05-06ND
2013-05-060.600 ppb
2013-06-030.560 ppb
2013-06-04ND
2013-07-09ND
2013-07-09ND
2013-08-05ND
2013-08-050.570 ppb
2013-10-070.550 ppb
2013-10-08ND
2013-11-040.650 ppb
2013-11-05ND
2013-11-180.550 ppb
2013-11-19ND
2013-12-02ND
2013-12-03ND
2014-01-060.510 ppb
2014-01-07ND
2014-02-03ND
2014-02-04ND
2014-03-03ND
2014-03-03ND
2014-04-07ND
2014-04-070.660 ppb
2014-05-05ND
2014-05-050.600 ppb
2014-06-020.820 ppb
2014-06-06ND
2014-07-070.710 ppb
2014-07-08ND
2014-08-05ND
2014-08-050.750 ppb
2014-09-09ND
2014-09-090.890 ppb
2014-10-060.960 ppb
2014-10-060.890 ppb
2014-10-07ND
2014-10-07ND
2014-11-040.560 ppb
2014-11-040.770 ppb
2014-12-010.570 ppb
2014-12-02ND
2015-01-050.660 ppb
2015-01-06ND
2015-02-020.580 ppb
2015-02-03ND
2015-02-170.580 ppb
2015-02-170.500 ppb
2015-02-170.550 ppb
2015-02-170.580 ppb
2015-02-170.540 ppb
2015-02-170.590 ppb
2015-02-170.560 ppb
2015-02-170.610 ppb
2015-02-170.600 ppb
2015-02-180.530 ppb
2015-02-180.600 ppb
2015-02-180.500 ppb
2015-02-180.580 ppb
2015-02-180.580 ppb
2015-02-180.570 ppb
2015-02-180.580 ppb
2015-02-180.570 ppb
2015-02-180.580 ppb
2015-02-180.570 ppb
2015-02-180.570 ppb
2015-02-190.510 ppb
2015-02-190.560 ppb
2015-02-190.540 ppb
2015-02-190.530 ppb
2015-02-190.500 ppb
2015-02-190.550 ppb
2015-02-190.560 ppb
2015-02-190.540 ppb
2015-02-190.540 ppb
2015-02-190.570 ppb
2015-02-19ND
2015-02-190.550 ppb
2015-03-02ND
2015-03-03ND
2015-04-060.600 ppb
2015-04-07ND
2015-05-04ND
2015-05-041.04 ppb
2015-05-180.900 ppb
2015-05-180.910 ppb
2015-05-180.890 ppb
2015-05-180.800 ppb
2015-05-180.890 ppb
2015-05-180.870 ppb
2015-05-190.840 ppb
2015-05-190.830 ppb
2015-05-190.760 ppb
2015-05-190.860 ppb
2015-05-190.820 ppb
2015-05-190.770 ppb
2015-05-190.760 ppb
2015-05-190.770 ppb
2015-05-190.920 ppb
2015-05-200.890 ppb
2015-05-200.840 ppb
2015-05-200.780 ppb
2015-05-200.750 ppb
2015-05-200.800 ppb
2015-05-200.820 ppb
2015-05-200.870 ppb
2015-05-200.770 ppb
2015-05-210.790 ppb
2015-05-210.680 ppb
2015-05-210.720 ppb
2015-05-210.800 ppb
2015-05-211.38 ppb
2015-05-210.830 ppb
2015-05-210.710 ppb
2015-05-210.670 ppb
2015-05-220.560 ppb
2015-06-010.570 ppb
2015-06-02ND
2015-07-060.790 ppb
2015-07-07ND
2015-08-030.820 ppb
2015-08-04ND
2015-08-170.770 ppb
2015-08-170.750 ppb
2015-08-170.840 ppb
2015-08-170.920 ppb
2015-08-170.840 ppb
2015-08-170.880 ppb
2015-08-170.850 ppb
2015-08-170.790 ppb
2015-08-170.860 ppb
2015-08-180.700 ppb
2015-08-180.720 ppb
2015-08-180.650 ppb
2015-08-180.920 ppb
2015-08-180.810 ppb
2015-08-180.950 ppb
2015-08-180.930 ppb
2015-08-190.820 ppb
2015-08-190.860 ppb
2015-08-190.950 ppb
2015-08-190.580 ppb
2015-08-190.910 ppb
2015-08-190.810 ppb
2015-08-190.580 ppb
2015-08-190.870 ppb
2015-08-200.920 ppb
2015-08-200.910 ppb
2015-08-200.890 ppb
2015-08-200.860 ppb
2015-08-200.990 ppb
2015-08-200.930 ppb
2015-08-200.850 ppb
2015-08-200.910 ppb
2015-09-08ND
2015-09-080.680 ppb
2015-10-050.640 ppb
2015-10-06ND
2015-10-20ND
2015-10-200.900 ppb
2015-11-020.830 ppb
2015-11-030.570 ppb
2015-11-160.860 ppb
2015-11-160.830 ppb
2015-11-160.920 ppb
2015-11-160.860 ppb
2015-11-160.940 ppb
2015-11-160.940 ppb
2015-11-160.880 ppb
2015-11-160.900 ppb
2015-11-160.800 ppb
2015-11-170.760 ppb
2015-11-170.830 ppb
2015-11-170.900 ppb
2015-11-171.000 ppb
2015-11-170.930 ppb
2015-11-170.900 ppb
2015-11-171.01 ppb
2015-11-180.900 ppb
2015-11-180.840 ppb
2015-11-180.850 ppb
2015-11-180.870 ppb
2015-11-180.850 ppb
2015-11-180.890 ppb
2015-11-180.630 ppb
2015-11-180.960 ppb
2015-11-190.720 ppb
2015-11-190.690 ppb
2015-11-190.780 ppb
2015-11-190.950 ppb
2015-11-190.880 ppb
2015-11-190.870 ppb
2015-11-190.880 ppb
2015-11-190.720 ppb
2015-12-070.690 ppb
2015-12-080.540 ppb
2016-02-160.830 ppb
2016-02-160.690 ppb
2016-02-160.730 ppb
2016-02-160.800 ppb
2016-02-160.790 ppb
2016-02-160.700 ppb
2016-02-160.750 ppb
2016-02-160.790 ppb
2016-02-160.810 ppb
2016-02-170.730 ppb
2016-02-170.540 ppb
2016-02-170.660 ppb
2016-02-170.600 ppb
2016-02-170.770 ppb
2016-02-170.720 ppb
2016-02-170.730 ppb
2016-02-170.570 ppb
2016-02-170.600 ppb
2016-02-170.580 ppb
2016-02-170.770 ppb
2016-02-180.790 ppb
2016-02-18ND
2016-02-180.720 ppb
2016-02-180.760 ppb
2016-02-180.690 ppb
2016-02-180.800 ppb
2016-02-180.550 ppb
2016-02-180.720 ppb
2016-02-180.840 ppb
2016-02-180.540 ppb
2016-02-180.590 ppb
2016-02-180.530 ppb
2016-05-160.960 ppb
2016-05-160.870 ppb
2016-05-160.950 ppb
2016-05-160.870 ppb
2016-05-161.04 ppb
2016-05-161.09 ppb
2016-05-161.02 ppb
2016-05-160.960 ppb
2016-05-160.860 ppb
2016-05-171.000 ppb
2016-05-170.880 ppb
2016-05-171.08 ppb
2016-05-170.960 ppb
2016-05-171.08 ppb
2016-05-171.01 ppb
2016-05-171.02 ppb
2016-05-180.990 ppb
2016-05-181.02 ppb
2016-05-180.960 ppb
2016-05-180.950 ppb
2016-05-180.980 ppb
2016-05-181.05 ppb
2016-05-180.990 ppb
2016-05-180.990 ppb
2016-05-190.890 ppb
2016-05-191.01 ppb
2016-05-191.05 ppb
2016-05-190.850 ppb
2016-05-190.900 ppb
2016-05-190.920 ppb
2016-05-190.860 ppb
2016-05-190.930 ppb
2016-08-150.790 ppb
2016-08-150.710 ppb
2016-08-150.870 ppb
2016-08-150.870 ppb
2016-08-150.880 ppb
2016-08-150.890 ppb
2016-08-150.860 ppb
2016-08-150.830 ppb
2016-08-150.920 ppb
2016-08-160.870 ppb
2016-08-160.730 ppb
2016-08-160.910 ppb
2016-08-160.850 ppb
2016-08-160.950 ppb
2016-08-160.860 ppb
2016-08-160.990 ppb
2016-08-170.870 ppb
2016-08-170.910 ppb
2016-08-170.980 ppb
2016-08-170.880 ppb
2016-08-170.920 ppb
2016-08-170.900 ppb
2016-08-170.880 ppb
2016-08-170.880 ppb
2016-08-170.940 ppb
2016-08-180.870 ppb
2016-08-180.870 ppb
2016-08-180.880 ppb
2016-08-180.880 ppb
2016-08-180.910 ppb
2016-08-180.960 ppb
2016-08-180.880 ppb
2016-10-180.680 ppb
2016-10-180.780 ppb
2016-11-140.770 ppb
2016-11-140.680 ppb
2016-11-140.760 ppb
2016-11-140.790 ppb
2016-11-140.870 ppb
2016-11-140.820 ppb
2016-11-140.770 ppb
2016-11-140.650 ppb
2016-11-140.650 ppb
2016-11-150.770 ppb
2016-11-150.790 ppb
2016-11-150.750 ppb
2016-11-150.870 ppb
2016-11-150.770 ppb
2016-11-150.740 ppb
2016-11-150.780 ppb
2016-11-160.610 ppb
2016-11-160.650 ppb
2016-11-160.630 ppb
2016-11-160.650 ppb
2016-11-160.830 ppb
2016-11-160.840 ppb
2016-11-160.700 ppb
2016-11-160.800 ppb
2016-11-160.610 ppb
2016-11-170.770 ppb
2016-11-170.710 ppb
2016-11-170.670 ppb
2016-11-170.690 ppb
2016-11-170.540 ppb
2016-11-170.710 ppb
2016-11-170.560 ppb
2017-02-130.890 ppb
2017-02-130.640 ppb
2017-02-130.910 ppb
2017-02-130.880 ppb
2017-02-130.910 ppb
2017-02-130.940 ppb
2017-02-130.850 ppb
2017-02-130.930 ppb
2017-02-130.780 ppb
2017-02-140.820 ppb
2017-02-140.890 ppb
2017-02-140.810 ppb
2017-02-140.880 ppb
2017-02-140.930 ppb
2017-02-140.850 ppb
2017-02-140.880 ppb
2017-02-150.910 ppb
2017-02-150.840 ppb
2017-02-150.930 ppb
2017-02-150.630 ppb
2017-02-150.820 ppb
2017-02-150.960 ppb
2017-02-150.830 ppb
2017-02-150.810 ppb
2017-02-160.950 ppb
2017-02-160.920 ppb
2017-02-160.910 ppb
2017-02-160.940 ppb
2017-02-160.960 ppb
2017-02-160.900 ppb
2017-02-160.880 ppb
2017-02-161.000 ppb
2017-05-150.880 ppb
2017-05-150.840 ppb
2017-05-150.980 ppb
2017-05-150.920 ppb
2017-05-150.970 ppb
2017-05-150.980 ppb
2017-05-150.990 ppb
2017-05-150.910 ppb
2017-05-150.780 ppb
2017-05-160.880 ppb
2017-05-160.900 ppb
2017-05-160.930 ppb
2017-05-160.950 ppb
2017-05-160.910 ppb
2017-05-170.940 ppb
2017-05-170.880 ppb
2017-05-170.930 ppb
2017-05-170.930 ppb
2017-05-171.02 ppb
2017-05-170.920 ppb
2017-05-171.000 ppb
2017-05-170.900 ppb
2017-05-180.940 ppb
2017-05-180.960 ppb
2017-05-180.940 ppb
2017-05-180.960 ppb
2017-05-181.02 ppb
2017-05-180.980 ppb
2017-05-180.990 ppb
2017-05-180.980 ppb
2017-05-181.02 ppb
2017-05-180.950 ppb
2017-08-140.920 ppb
2017-08-140.910 ppb
2017-08-140.980 ppb
2017-08-140.950 ppb
2017-08-141.06 ppb
2017-08-141.05 ppb
2017-08-140.960 ppb
2017-08-141.06 ppb
2017-08-140.980 ppb
2017-08-150.990 ppb
2017-08-151.05 ppb
2017-08-151.02 ppb
2017-08-151.06 ppb
2017-08-150.920 ppb
2017-08-161.07 ppb
2017-08-161.18 ppb
2017-08-160.880 ppb
2017-08-160.940 ppb
2017-08-161.08 ppb
2017-08-161.10 ppb
2017-08-161.04 ppb
2017-08-161.11 ppb
2017-08-160.980 ppb
2017-08-160.980 ppb
2017-08-170.950 ppb
2017-08-171.000 ppb
2017-08-171.14 ppb
2017-08-170.840 ppb
2017-08-170.920 ppb
2017-08-170.930 ppb
2017-08-170.980 ppb
2017-08-171.12 ppb
2017-10-170.720 ppb
2017-10-171.02 ppb
2017-11-130.890 ppb
2017-11-131.08 ppb
2017-11-131.000 ppb
2017-11-131.07 ppb
2017-11-130.970 ppb
2017-11-131.01 ppb
2017-11-131.000 ppb
2017-11-131.17 ppb
2017-11-131.22 ppb
2017-11-140.960 ppb
2017-11-141.10 ppb
2017-11-141.08 ppb
2017-11-141.04 ppb
2017-11-141.10 ppb
2017-11-150.960 ppb
2017-11-151.09 ppb
2017-11-150.940 ppb
2017-11-150.970 ppb
2017-11-151.000 ppb
2017-11-151.04 ppb
2017-11-151.09 ppb
2017-11-150.990 ppb
2017-11-151.01 ppb
2017-11-150.920 ppb
2017-11-161.05 ppb
2017-11-160.990 ppb
2017-11-161.000 ppb
2017-11-160.880 ppb
2017-11-161.03 ppb
2017-11-161.01 ppb
2017-11-161.01 ppb
2017-11-160.990 ppb