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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

City of Tacoma

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

 

347

Samples

0

Samples exceeding legal limit (MCL)

307

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.43 ppb6453ND - 3.70 ppb
20151.74 ppb5537ND - 23.0 ppb
20161.34 ppb6154ND - 3.00 ppb
20171.52 ppb60600.570 ppb - 2.80 ppb
20181.13 ppb5655ND - 2.20 ppb
20191.47 ppb5148ND - 2.70 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.06 ppb

The EWG Health Guideline of 0.06 ppb for bromodichloromethane 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
2014-01-0790639ND
2014-01-07906320.810 ppb
2014-01-07906351.30 ppb
2014-01-07906370.850 ppb
2014-01-07906331.40 ppb
2014-01-07906260.970 ppb
2014-01-07906341.20 ppb
2014-01-07906290.600 ppb
2014-01-07906361.20 ppb
2014-01-07906400.680 ppb
2014-01-07906300.870 ppb
2014-01-07906270.810 ppb
2014-01-0790638ND
2014-01-07906310.990 ppb
2014-01-07906280.900 ppb
2014-04-14704660.570 ppb
2014-04-1470471ND
2014-04-14704681.000 ppb
2014-04-14704701.000 ppb
2014-04-14704690.550 ppb
2014-04-1470462ND
2014-04-14704610.610 ppb
2014-04-14704670.990 ppb
2014-04-14704630.0720 ppb
2014-04-1570475ND
2014-04-1570474ND
2014-04-15704720.500 ppb
2014-04-15704650.650 ppb
2014-04-15704640.840 ppb
2014-04-1570473ND
2014-07-14706811.70 ppb
2014-07-14706872.30 ppb
2014-07-14706902.20 ppb
2014-07-14706831.60 ppb
2014-07-14706841.50 ppb
2014-07-14706912.60 ppb
2014-07-14706882.10 ppb
2014-07-14706892.10 ppb
2014-07-14706821.60 ppb
2014-07-14706861.70 ppb
2014-07-14706851.60 ppb
2014-07-15706951.60 ppb
2014-07-15706922.00 ppb
2014-07-15706941.10 ppb
2014-07-15706930.930 ppb
2014-10-06002572.90 ppb
2014-10-06002553.20 ppb
2014-10-06002613.40 ppb
2014-10-06002523.00 ppb
2014-10-06002532.90 ppb
2014-10-06002583.70 ppb
2014-10-06002593.50 ppb
2014-10-06002543.10 ppb
2014-10-06002603.50 ppb
2014-10-06002563.50 ppb
2014-10-07002633.10 ppb
2014-10-07002623.20 ppb
2014-10-07002641.90 ppb
2014-10-07002652.10 ppb
2014-10-07002662.50 ppb
2014-11-1329191ND
2014-11-1429192ND
2014-11-1830352ND
2014-12-0234852ND
2015-01-13507390.870 ppb
2015-01-13507380.670 ppb
2015-01-13507370.640 ppb
2015-01-13507360.900 ppb
2015-01-13507350.890 ppb
2015-01-14507332.40 ppb
2015-01-14507321.40 ppb
2015-01-14507312.50 ppb
2015-01-14507300.980 ppb
2015-01-14507291.30 ppb
2015-01-14507280.930 ppb
2015-01-14507271.20 ppb
2015-01-14507260.940 ppb
2015-01-14507341.20 ppb
2015-01-14507251.20 ppb
2015-06-0827944ND
2015-07-07904212.20 ppb
2015-07-07904232.30 ppb
2015-07-08904201.50 ppb
2015-07-0890425ND
2015-07-089042723.0 ppb
2015-07-08904220.560 ppb
2015-07-08904241.80 ppb
2015-07-08904262.80 ppb
2015-08-0585793ND
2015-10-13504091.70 ppb
2015-10-13504131.70 ppb
2015-10-13504121.30 ppb
2015-10-13504073.70 ppb
2015-10-13504102.00 ppb
2015-10-13503993.20 ppb
2015-10-13504042.40 ppb
2015-10-13504064.90 ppb
2015-10-13504013.90 ppb
2015-10-13504032.30 ppb
2015-10-13504002.70 ppb
2015-10-13504055.00 ppb
2015-10-13504085.30 ppb
2015-10-13504021.90 ppb
2015-10-14504111.60 ppb
2015-12-0138661ND
2015-12-0138661ND
2015-12-0138661ND
2015-12-0138661ND
2015-12-0238662ND
2015-12-0238662ND
2015-12-0238662ND
2015-12-0238662ND
2015-12-0338663ND
2015-12-0338663ND
2015-12-0338663ND
2015-12-0338663ND
2015-12-0741682ND
2015-12-0741681ND
2015-12-0841683ND
2016-01-040.630 ppb
2016-01-040.750 ppb
2016-01-040.650 ppb
2016-01-040.770 ppb
2016-01-05ND
2016-01-05ND
2016-01-050.570 ppb
2016-01-05ND
2016-01-050.720 ppb
2016-01-05ND
2016-01-060.740 ppb
2016-01-061.60 ppb
2016-01-060.990 ppb
2016-01-061.50 ppb
2016-01-060.910 ppb
2016-04-040.830 ppb
2016-04-040.710 ppb
2016-04-040.700 ppb
2016-04-041.000 ppb
2016-04-040.960 ppb
2016-04-040.900 ppb
2016-04-041.20 ppb
2016-04-04ND
2016-04-040.970 ppb
2016-04-040.830 ppb
2016-04-040.600 ppb
2016-04-040.670 ppb
2016-04-040.560 ppb
2016-04-05ND
2016-04-050.550 ppb
2016-04-06ND
2016-07-060.890 ppb
2016-07-061.40 ppb
2016-07-061.60 ppb
2016-07-061.60 ppb
2016-07-061.90 ppb
2016-07-061.80 ppb
2016-07-061.70 ppb
2016-07-061.90 ppb
2016-07-061.80 ppb
2016-07-062.00 ppb
2016-07-062.00 ppb
2016-07-061.90 ppb
2016-07-061.50 ppb
2016-07-062.40 ppb
2016-07-061.000 ppb
2016-10-032.40 ppb
2016-10-032.80 ppb
2016-10-032.90 ppb
2016-10-032.40 ppb
2016-10-032.80 ppb
2016-10-032.80 ppb
2016-10-032.50 ppb
2016-10-033.00 ppb
2016-10-032.20 ppb
2016-10-032.40 ppb
2016-10-042.10 ppb
2016-10-041.70 ppb
2016-10-042.30 ppb
2016-10-042.00 ppb
2016-10-041.60 ppb
2017-01-031.20 ppb
2017-01-031.000 ppb
2017-01-030.570 ppb
2017-01-031.20 ppb
2017-01-031.60 ppb
2017-01-032.00 ppb
2017-01-030.970 ppb
2017-01-030.880 ppb
2017-01-031.30 ppb
2017-01-031.20 ppb
2017-01-031.30 ppb
2017-01-031.60 ppb
2017-01-031.20 ppb
2017-01-030.740 ppb
2017-01-032.10 ppb
2017-04-032.00 ppb
2017-04-031.50 ppb
2017-04-031.20 ppb
2017-04-031.70 ppb
2017-04-031.50 ppb
2017-04-031.60 ppb
2017-04-031.30 ppb
2017-04-031.40 ppb
2017-04-031.60 ppb
2017-04-031.50 ppb
2017-04-031.30 ppb
2017-04-041.20 ppb
2017-04-040.950 ppb
2017-04-040.930 ppb
2017-04-051.50 ppb
2017-07-051.60 ppb
2017-07-051.40 ppb
2017-07-051.10 ppb
2017-07-050.870 ppb
2017-07-051.60 ppb
2017-07-051.60 ppb
2017-07-051.50 ppb
2017-07-051.60 ppb
2017-07-051.80 ppb
2017-07-061.80 ppb
2017-07-061.50 ppb
2017-07-061.80 ppb
2017-07-061.40 ppb
2017-07-062.00 ppb
2017-07-061.60 ppb
2017-10-022.80 ppb
2017-10-021.20 ppb
2017-10-022.40 ppb
2017-10-021.90 ppb
2017-10-022.00 ppb
2017-10-021.60 ppb
2017-10-021.60 ppb
2017-10-021.80 ppb
2017-10-021.60 ppb
2017-10-022.10 ppb
2017-10-022.00 ppb
2017-10-022.00 ppb
2017-10-022.20 ppb
2017-10-031.90 ppb
2017-10-031.000 ppb
2018-01-021.10 ppb
2018-01-021.10 ppb
2018-01-021.20 ppb
2018-01-021.10 ppb
2018-01-020.950 ppb
2018-01-020.980 ppb
2018-01-021.20 ppb
2018-01-021.000 ppb
2018-01-021.10 ppb
2018-01-021.10 ppb
2018-01-020.850 ppb
2018-01-030.890 ppb
2018-01-03ND
2018-01-030.550 ppb
2018-01-030.720 ppb
2018-04-021.10 ppb
2018-04-021.30 ppb
2018-04-021.40 ppb
2018-04-021.20 ppb
2018-04-021.10 ppb
2018-04-021.30 ppb
2018-04-021.20 ppb
2018-04-021.40 ppb
2018-04-021.10 ppb
2018-04-021.20 ppb
2018-04-020.840 ppb
2018-04-020.990 ppb
2018-04-030.830 ppb
2018-04-031.10 ppb
2018-07-020.860 ppb
2018-07-021.000 ppb
2018-07-021.000 ppb
2018-07-020.620 ppb
2018-07-020.600 ppb
2018-07-020.880 ppb
2018-07-020.970 ppb
2018-07-030.950 ppb
2018-07-031.10 ppb
2018-07-030.930 ppb
2018-07-031.000 ppb
2018-07-031.10 ppb
2018-07-031.000 ppb
2018-07-031.30 ppb
2018-07-030.950 ppb
2018-10-301.60 ppb
2018-10-301.70 ppb
2018-10-302.10 ppb
2018-10-301.40 ppb
2018-10-301.70 ppb
2018-10-311.30 ppb
2018-10-311.50 ppb
2018-10-312.20 ppb
2018-10-311.40 ppb
2018-10-311.40 ppb
2018-10-311.50 ppb
2018-10-311.30 ppb
2019-01-02ND
2019-01-141.20 ppb
2019-01-141.60 ppb
2019-01-141.30 ppb
2019-01-141.90 ppb
2019-01-141.30 ppb
2019-01-141.70 ppb
2019-01-141.30 ppb
2019-01-141.20 ppb
2019-01-141.20 ppb
2019-01-141.50 ppb
2019-01-141.10 ppb
2019-01-151.000 ppb
2019-04-011.30 ppb
2019-04-011.30 ppb
2019-04-011.40 ppb
2019-04-011.20 ppb
2019-04-011.10 ppb
2019-04-011.10 ppb
2019-04-011.50 ppb
2019-04-011.20 ppb
2019-04-011.10 ppb
2019-04-011.20 ppb
2019-04-011.20 ppb
2019-04-031.000 ppb
2019-07-081.30 ppb
2019-07-081.40 ppb
2019-07-081.50 ppb
2019-07-081.30 ppb
2019-07-081.20 ppb
2019-07-081.40 ppb
2019-07-081.60 ppb
2019-07-081.40 ppb
2019-07-081.50 ppb
2019-07-081.50 ppb
2019-07-081.40 ppb
2019-07-081.30 ppb
2019-07-24ND
2019-10-012.40 ppb
2019-10-012.40 ppb
2019-10-012.40 ppb
2019-10-012.00 ppb
2019-10-021.90 ppb
2019-10-022.20 ppb
2019-10-022.60 ppb
2019-10-022.20 ppb
2019-10-022.30 ppb
2019-10-022.70 ppb
2019-10-021.80 ppb
2019-10-022.20 ppb
2019-12-03ND