Bromodichloromethane
Seattle Public Utilities
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | 1.76 ppb | 48 | 48 | 0.900 ppb - 2.90 ppb |
2015 | 2.89 ppb | 50 | 50 | 1.26 ppb - 9.19 ppb |
2016 | 2.09 ppb | 48 | 48 | 1.29 ppb - 2.79 ppb |
2017 | 1.83 ppb | 50 | 49 | ND - 2.74 ppb |
2018 | 1.78 ppb | 48 | 48 | 1.000 ppb - 3.41 ppb |
2019 | 1.97 ppb | 48 | 48 | 1.48 ppb - 2.74 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 |
---|---|---|
2014-02-04 | 02163 | 1.40 ppb |
2014-02-04 | 02168 | 1.40 ppb |
2014-02-04 | 02166 | 1.000 ppb |
2014-02-04 | 02165 | 2.00 ppb |
2014-02-04 | 02160 | 1.40 ppb |
2014-02-04 | 02159 | 1.50 ppb |
2014-02-04 | 02162 | 2.10 ppb |
2014-02-04 | 02167 | 1.40 ppb |
2014-02-04 | 02161 | 1.40 ppb |
2014-02-04 | 02164 | 0.900 ppb |
2014-02-04 | 02169 | 1.50 ppb |
2014-02-04 | 02158 | 1.50 ppb |
2014-05-06 | 07984 | 1.50 ppb |
2014-05-06 | 07982 | 1.30 ppb |
2014-05-06 | 07979 | 1.60 ppb |
2014-05-06 | 07981 | 1.90 ppb |
2014-05-06 | 07980 | 1.70 ppb |
2014-05-06 | 07985 | 1.90 ppb |
2014-05-06 | 07977 | 1.50 ppb |
2014-05-06 | 07983 | 1.60 ppb |
2014-05-06 | 07976 | 1.50 ppb |
2014-05-06 | 07974 | 1.40 ppb |
2014-05-06 | 07978 | 1.60 ppb |
2014-05-06 | 07975 | 1.40 ppb |
2014-08-05 | 14161 | 1.50 ppb |
2014-08-05 | 14156 | 1.50 ppb |
2014-08-05 | 14159 | 1.10 ppb |
2014-08-05 | 14167 | 2.30 ppb |
2014-08-05 | 14157 | 1.50 ppb |
2014-08-05 | 14166 | 2.10 ppb |
2014-08-05 | 14163 | 2.10 ppb |
2014-08-05 | 14158 | 1.70 ppb |
2014-08-05 | 14164 | 1.90 ppb |
2014-08-05 | 14165 | 1.50 ppb |
2014-08-05 | 14160 | 2.20 ppb |
2014-08-05 | 14162 | 1.90 ppb |
2014-11-06 | 01100 | 2.60 ppb |
2014-11-06 | 01101 | 2.60 ppb |
2014-11-06 | 01111 | 1.50 ppb |
2014-11-06 | 01108 | 1.50 ppb |
2014-11-06 | 01106 | 1.50 ppb |
2014-11-06 | 01102 | 2.80 ppb |
2014-11-06 | 01105 | 2.60 ppb |
2014-11-06 | 01104 | 2.70 ppb |
2014-11-06 | 01103 | 2.70 ppb |
2014-11-06 | 01110 | 1.40 ppb |
2014-11-06 | 01109 | 2.90 ppb |
2014-11-06 | 01107 | 2.20 ppb |
2015-02-05 | 40512 | 1.62 ppb |
2015-02-05 | 40508 | 1.46 ppb |
2015-02-05 | 40507 | 1.54 ppb |
2015-02-05 | 40503 | 1.69 ppb |
2015-02-05 | 40510 | 1.59 ppb |
2015-02-05 | 40509 | 1.26 ppb |
2015-02-05 | 40501 | 1.60 ppb |
2015-02-05 | 40502 | 1.45 ppb |
2015-02-05 | 40504 | 1.60 ppb |
2015-02-05 | 40511 | 1.41 ppb |
2015-02-05 | 40505 | 1.71 ppb |
2015-02-05 | 40506 | 1.52 ppb |
2015-05-08 | 12012 | 1.79 ppb |
2015-05-08 | 12011 | 1.79 ppb |
2015-05-08 | 12010 | 1.81 ppb |
2015-05-08 | 12009 | 1.38 ppb |
2015-05-08 | 12008 | 1.59 ppb |
2015-05-08 | 12007 | 1.85 ppb |
2015-05-08 | 12006 | 1.33 ppb |
2015-05-08 | 12005 | 2.16 ppb |
2015-05-08 | 12004 | 2.08 ppb |
2015-05-08 | 12003 | 1.80 ppb |
2015-05-08 | 12002 | 1.73 ppb |
2015-05-08 | 12001 | 1.76 ppb |
2015-08-04 | 66312 | 2.61 ppb |
2015-08-04 | 66311 | 2.49 ppb |
2015-08-04 | 66310 | 2.49 ppb |
2015-08-04 | 66309 | 2.24 ppb |
2015-08-04 | 66308 | 2.35 ppb |
2015-08-04 | 66307 | 2.24 ppb |
2015-08-04 | 66306 | 2.34 ppb |
2015-08-04 | 66305 | 3.36 ppb |
2015-08-04 | 66304 | 2.40 ppb |
2015-08-04 | 66303 | 2.65 ppb |
2015-08-04 | 66302 | 2.11 ppb |
2015-08-04 | 66301 | 2.38 ppb |
2015-08-14 | 72501 | 3.42 ppb |
2015-09-15 | 95609 | 2.26 ppb |
2015-11-05 | 44412 | 2.30 ppb |
2015-11-05 | 44411 | 2.14 ppb |
2015-11-05 | 44410 | 8.81 ppb |
2015-11-05 | 44409 | 2.13 ppb |
2015-11-05 | 44408 | 3.94 ppb |
2015-11-05 | 44407 | 2.01 ppb |
2015-11-05 | 44406 | 8.24 ppb |
2015-11-05 | 44405 | 7.07 ppb |
2015-11-05 | 44404 | 7.45 ppb |
2015-11-05 | 44403 | 8.67 ppb |
2015-11-05 | 44402 | 7.74 ppb |
2015-11-05 | 44401 | 9.19 ppb |
2016-02-02 | 1.29 ppb | |
2016-02-02 | 1.45 ppb | |
2016-02-02 | 2.54 ppb | |
2016-02-02 | 2.28 ppb | |
2016-02-02 | 1.52 ppb | |
2016-02-02 | 1.50 ppb | |
2016-02-02 | 1.72 ppb | |
2016-02-02 | 2.43 ppb | |
2016-02-02 | 1.73 ppb | |
2016-02-02 | 2.08 ppb | |
2016-02-02 | 1.49 ppb | |
2016-02-02 | 1.31 ppb | |
2016-05-04 | 2.53 ppb | |
2016-05-04 | 2.14 ppb | |
2016-05-04 | 2.28 ppb | |
2016-05-04 | 2.03 ppb | |
2016-05-04 | 2.09 ppb | |
2016-05-04 | 2.59 ppb | |
2016-05-04 | 2.24 ppb | |
2016-05-04 | 2.56 ppb | |
2016-05-04 | 2.65 ppb | |
2016-05-04 | 2.12 ppb | |
2016-05-04 | 2.07 ppb | |
2016-05-04 | 2.14 ppb | |
2016-08-03 | 2.07 ppb | |
2016-08-03 | 1.81 ppb | |
2016-08-03 | 2.20 ppb | |
2016-08-03 | 2.08 ppb | |
2016-08-03 | 1.88 ppb | |
2016-08-03 | 1.96 ppb | |
2016-08-03 | 2.39 ppb | |
2016-08-03 | 1.95 ppb | |
2016-08-03 | 2.13 ppb | |
2016-08-03 | 2.11 ppb | |
2016-08-03 | 2.33 ppb | |
2016-08-03 | 2.35 ppb | |
2016-11-02 | 1.97 ppb | |
2016-11-02 | 2.22 ppb | |
2016-11-02 | 1.87 ppb | |
2016-11-02 | 2.79 ppb | |
2016-11-02 | 2.64 ppb | |
2016-11-02 | 1.85 ppb | |
2016-11-02 | 1.75 ppb | |
2016-11-02 | 2.64 ppb | |
2016-11-02 | 1.64 ppb | |
2016-11-02 | 1.62 ppb | |
2016-11-02 | 2.30 ppb | |
2016-11-02 | 2.78 ppb | |
2017-02-08 | 1.50 ppb | |
2017-02-08 | 1.33 ppb | |
2017-02-08 | 1.48 ppb | |
2017-02-08 | 1.36 ppb | |
2017-02-08 | 1.34 ppb | |
2017-02-08 | 1.47 ppb | |
2017-02-08 | 1.37 ppb | |
2017-02-08 | 1.45 ppb | |
2017-02-08 | 1.47 ppb | |
2017-02-08 | 1.44 ppb | |
2017-02-08 | 1.31 ppb | |
2017-02-14 | 1.42 ppb | |
2017-03-07 | ND | |
2017-05-02 | 1.74 ppb | |
2017-05-02 | 1.80 ppb | |
2017-05-02 | 1.79 ppb | |
2017-05-02 | 1.74 ppb | |
2017-05-02 | 1.66 ppb | |
2017-05-02 | 1.66 ppb | |
2017-05-02 | 1.63 ppb | |
2017-05-02 | 1.70 ppb | |
2017-05-02 | 2.01 ppb | |
2017-05-02 | 1.69 ppb | |
2017-05-02 | 2.20 ppb | |
2017-05-02 | 1.75 ppb | |
2017-06-06 | 1.11 ppb | |
2017-08-07 | 2.02 ppb | |
2017-08-07 | 1.72 ppb | |
2017-08-07 | 1.83 ppb | |
2017-08-07 | 2.33 ppb | |
2017-08-07 | 1.85 ppb | |
2017-08-07 | 1.79 ppb | |
2017-08-07 | 1.96 ppb | |
2017-08-07 | 2.23 ppb | |
2017-08-07 | 2.31 ppb | |
2017-08-07 | 1.74 ppb | |
2017-08-07 | 1.95 ppb | |
2017-08-07 | 1.71 ppb | |
2017-11-07 | 2.33 ppb | |
2017-11-07 | 2.49 ppb | |
2017-11-07 | 2.45 ppb | |
2017-11-07 | 2.34 ppb | |
2017-11-07 | 2.18 ppb | |
2017-11-07 | 2.54 ppb | |
2017-11-07 | 2.74 ppb | |
2017-11-07 | 1.98 ppb | |
2017-11-07 | 2.63 ppb | |
2017-11-07 | 2.02 ppb | |
2017-11-07 | 2.37 ppb | |
2017-11-08 | 2.49 ppb | |
2018-02-06 | 1.40 ppb | |
2018-02-06 | 1.56 ppb | |
2018-02-06 | 1.45 ppb | |
2018-02-06 | 1.47 ppb | |
2018-02-06 | 1.53 ppb | |
2018-02-06 | 1.38 ppb | |
2018-02-06 | 1.67 ppb | |
2018-02-06 | 1.57 ppb | |
2018-02-06 | 1.61 ppb | |
2018-02-06 | 1.39 ppb | |
2018-02-06 | 1.51 ppb | |
2018-02-06 | 1.70 ppb | |
2018-05-08 | 1.77 ppb | |
2018-05-08 | 1.69 ppb | |
2018-05-08 | 1.45 ppb | |
2018-05-08 | 1.73 ppb | |
2018-05-08 | 1.79 ppb | |
2018-05-08 | 1.74 ppb | |
2018-05-08 | 1.98 ppb | |
2018-05-08 | 1.88 ppb | |
2018-05-08 | 1.88 ppb | |
2018-05-08 | 1.72 ppb | |
2018-05-08 | 2.07 ppb | |
2018-05-08 | 2.33 ppb | |
2018-08-01 | 1.56 ppb | |
2018-08-01 | 1.49 ppb | |
2018-08-01 | 1.82 ppb | |
2018-08-01 | 1.57 ppb | |
2018-08-01 | 1.77 ppb | |
2018-08-01 | 1.54 ppb | |
2018-08-01 | 2.23 ppb | |
2018-08-01 | 2.34 ppb | |
2018-08-01 | 2.02 ppb | |
2018-08-01 | 1.72 ppb | |
2018-08-01 | 2.26 ppb | |
2018-08-01 | 2.38 ppb | |
2018-11-06 | 1.41 ppb | |
2018-11-06 | 1.63 ppb | |
2018-11-06 | 3.41 ppb | |
2018-11-06 | 1.48 ppb | |
2018-11-06 | 1.000 ppb | |
2018-11-06 | 1.44 ppb | |
2018-11-06 | 2.04 ppb | |
2018-11-06 | 2.75 ppb | |
2018-11-06 | 1.59 ppb | |
2018-11-06 | 1.53 ppb | |
2018-11-06 | 2.02 ppb | |
2018-11-06 | 2.38 ppb | |
2019-02-07 | 1.58 ppb | |
2019-02-07 | 1.51 ppb | |
2019-02-07 | 1.59 ppb | |
2019-02-07 | 1.60 ppb | |
2019-02-07 | 1.52 ppb | |
2019-02-07 | 1.50 ppb | |
2019-02-07 | 1.86 ppb | |
2019-02-07 | 1.99 ppb | |
2019-02-07 | 1.83 ppb | |
2019-02-07 | 1.48 ppb | |
2019-02-07 | 1.77 ppb | |
2019-02-07 | 1.99 ppb | |
2019-05-07 | 1.57 ppb | |
2019-05-07 | 1.48 ppb | |
2019-05-07 | 1.68 ppb | |
2019-05-07 | 1.55 ppb | |
2019-05-07 | 1.69 ppb | |
2019-05-07 | 1.63 ppb | |
2019-05-07 | 1.85 ppb | |
2019-05-07 | 2.01 ppb | |
2019-05-07 | 1.81 ppb | |
2019-05-07 | 1.71 ppb | |
2019-05-07 | 1.92 ppb | |
2019-05-07 | 2.17 ppb | |
2019-08-07 | 2.16 ppb | |
2019-08-07 | 2.50 ppb | |
2019-08-07 | 2.07 ppb | |
2019-08-07 | 1.94 ppb | |
2019-08-07 | 2.26 ppb | |
2019-08-07 | 1.87 ppb | |
2019-08-07 | 2.40 ppb | |
2019-08-07 | 2.18 ppb | |
2019-08-07 | 1.94 ppb | |
2019-08-07 | 2.10 ppb | |
2019-08-07 | 2.58 ppb | |
2019-08-07 | 2.61 ppb | |
2019-11-07 | 2.20 ppb | |
2019-11-07 | 2.23 ppb | |
2019-11-07 | 2.54 ppb | |
2019-11-07 | 2.74 ppb | |
2019-11-07 | 2.55 ppb | |
2019-11-07 | 2.55 ppb | |
2019-11-07 | 1.80 ppb | |
2019-11-07 | 2.28 ppb | |
2019-11-07 | 1.68 ppb | |
2019-11-07 | 2.30 ppb | |
2019-11-07 | 1.79 ppb | |
2019-11-07 | 2.01 ppb |