Dibromochloromethane
Regional Water Authority
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | 0.805 ppb | 58 | 41 | ND - 3.40 ppb |
2015 | 0.583 ppb | 59 | 31 | ND - 3.80 ppb |
2016 | 0.864 ppb | 58 | 42 | ND - 5.00 ppb |
2017 | 0.982 ppb | 60 | 50 | ND - 4.30 ppb |
2018 | 1.06 ppb | 58 | 49 | ND - 4.70 ppb |
2019 | 1.27 ppb | 59 | 54 | ND - 3.40 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 | Lab ID | Result |
---|---|---|
2014-03-04 | DBP 200391954 | 0.600 ppb |
2014-03-04 | DBP 200391959 | 0.600 ppb |
2014-03-04 | DBP 200391974 | 0.500 ppb |
2014-03-04 | VOC1 200391963 | ND |
2014-03-04 | VOC1 200391964 | ND |
2014-03-04 | VOC1 200391965 | ND |
2014-03-04 | VOC1 200391977 | ND |
2014-03-04 | VOC1 200391978 | ND |
2014-03-04 | VOC1 200391979 | ND |
2014-03-04 | VOC1 200391980 | 0.600 ppb |
2014-03-04 | VOC1 200392005 | 0.800 ppb |
2014-03-04 | VOC1 200392007 | ND |
2014-03-05 | DBP 200392092 | 0.700 ppb |
2014-03-05 | DBP 200392093 | 0.600 ppb |
2014-03-05 | DBP 200392094 | 2.50 ppb |
2014-03-06 | DBP 200392152 | 2.10 ppb |
2014-03-06 | DBP 200392201 | 0.700 ppb |
2014-03-06 | DBP 200392202 | 0.900 ppb |
2014-03-07 | DBP 200392306 | 0.500 ppb |
2014-03-07 | DBP 200392307 | 0.600 ppb |
2014-03-07 | DBP 200392308 | 0.700 ppb |
2014-03-25 | VOC1 200393100 | ND |
2014-06-02 | DBP 200396948 | 0.900 ppb |
2014-06-02 | DBP 200396949 | 0.900 ppb |
2014-06-02 | DBP 200396950 | 3.40 ppb |
2014-06-03 | DBP 200396959 | 1.000 ppb |
2014-06-03 | DBP 200396964 | 0.800 ppb |
2014-06-03 | DBP 200396982 | 0.700 ppb |
2014-06-03 | DBP 200397073 | 0.700 ppb |
2014-06-05 | DBP 200397229 | 3.10 ppb |
2014-06-05 | DBP 200397327 | ND |
2014-06-05 | DBP 200397328 | 0.600 ppb |
2014-06-06 | DBP 200397354 | 0.600 ppb |
2014-06-06 | DBP 200397355 | 0.600 ppb |
2014-09-02 | DBP 200403272 | 0.700 ppb |
2014-09-02 | DBP 200403277 | 0.800 ppb |
2014-09-02 | DBP 200403302 | 0.600 ppb |
2014-09-03 | DBP 200403470 | 0.800 ppb |
2014-09-03 | DBP 200403471 | ND |
2014-09-03 | DBP 200403472 | 1.000 ppb |
2014-09-04 | DBP 200403517 | 3.30 ppb |
2014-09-04 | DBP 200403556 | ND |
2014-09-04 | DBP 200403557 | ND |
2014-09-04 | DBP 200403558 | ND |
2014-09-06 | DBP 200403687 | 3.10 ppb |
2014-09-06 | DBP 200403688 | ND |
2014-12-02 | DBP 200408683 | ND |
2014-12-02 | DBP 200408688 | 0.500 ppb |
2014-12-02 | DBP 200408706 | ND |
2014-12-02 | DBP 200408748 | 0.600 ppb |
2014-12-02 | DBP 200408749 | 0.600 ppb |
2014-12-02 | DBP 200408750 | ND |
2014-12-03 | DBP 200408856 | 2.70 ppb |
2014-12-03 | DBP 200408857 | 2.30 ppb |
2014-12-04 | DBP 200408946 | 2.20 ppb |
2014-12-04 | DBP 200408968 | 0.600 ppb |
2014-12-04 | DBP 200408969 | 0.600 ppb |
2014-12-04 | DBP 200408970 | 0.600 ppb |
2015-03-02 | DBP 200412850 | ND |
2015-03-02 | DBP 200412851 | ND |
2015-03-03 | DBP 200412870 | ND |
2015-03-03 | DBP 200412928 | ND |
2015-03-03 | DBP 200412883 | ND |
2015-03-03 | DBP 200412929 | 0.600 ppb |
2015-03-03 | DBP 200412863 | ND |
2015-03-03 | VOC1 200412899 | 0.600 ppb |
2015-03-03 | VOC1 200412902 | ND |
2015-03-03 | VOC1 200412900 | ND |
2015-03-03 | VOC1 200412879 | ND |
2015-03-03 | VOC1 200412881 | 0.800 ppb |
2015-03-03 | VOC1 200412907 | ND |
2015-03-03 | VOC1 200412923 | ND |
2015-03-04 | DBP 200413051 | 2.00 ppb |
2015-03-04 | VOC1 200413022 | 1.000 ppb |
2015-03-05 | DBP 200413154 | ND |
2015-03-05 | DBP 200413155 | ND |
2015-03-05 | DBP 200413156 | ND |
2015-03-05 | DBP 200413130 | 1.50 ppb |
2015-03-10 | VOC1 200413328 | ND |
2015-03-18 | VOC1 200413713 | ND |
2015-06-01 | DBP 200417563 | 2.10 ppb |
2015-06-01 | DBP 200417603 | ND |
2015-06-01 | DBP 200417602 | 0.600 ppb |
2015-06-01 | DBP 200417595 | ND |
2015-06-01 | DBP 200417605 | 0.800 ppb |
2015-06-01 | DBP 200417604 | 0.500 ppb |
2015-06-02 | DBP 200417701 | ND |
2015-06-02 | DBP 200417699 | ND |
2015-06-02 | DBP 200417624 | ND |
2015-06-02 | DBP 200417629 | 0.500 ppb |
2015-06-03 | DBP 200417819 | 0.500 ppb |
2015-06-03 | DBP 200417823 | 2.60 ppb |
2015-09-01 | DBP 200423821 | 3.20 ppb |
2015-09-01 | DBP 200423867 | 0.500 ppb |
2015-09-01 | DBP 200423812 | ND |
2015-09-01 | DBP 200423829 | ND |
2015-09-01 | DBP 200423866 | ND |
2015-09-01 | DBP 200423868 | ND |
2015-09-01 | DBP 200423807 | ND |
2015-09-01 | DBP 200423869 | 0.500 ppb |
2015-09-02 | DBP 200424081 | 0.500 ppb |
2015-09-02 | DBP 200424082 | 0.600 ppb |
2015-09-02 | DBP 200424080 | ND |
2015-09-04 | DBP 200424271 | 3.80 ppb |
2015-12-01 | DBP 200429546 | 0.600 ppb |
2015-12-01 | DBP 200429601 | 0.800 ppb |
2015-12-01 | DBP 200429604 | 0.600 ppb |
2015-12-01 | DBP 200429556 | 0.500 ppb |
2015-12-01 | DBP 200429602 | 0.800 ppb |
2015-12-01 | DBP 200429541 | 0.500 ppb |
2015-12-02 | DBP 200429725 | 2.10 ppb |
2015-12-02 | DBP 200429751 | 2.70 ppb |
2015-12-02 | DBP 200429752 | 0.600 ppb |
2015-12-03 | DBP 200429877 | 0.800 ppb |
2015-12-03 | DBP 200429876 | 0.600 ppb |
2015-12-03 | DBP 200429875 | 0.600 ppb |
2015-12-04 | VOC1 200429711 | ND |
2016-02-29 | VOC1 200434386 | ND |
2016-02-29 | VOC1 200434387 | 1.30 ppb |
2016-02-29 | VOC1 200434371 | 0.700 ppb |
2016-02-29 | VOC1 200434372 | 1.50 ppb |
2016-03-01 | DBP 200434420 | 0.500 ppb |
2016-03-01 | DBP 200434432 | 0.500 ppb |
2016-03-01 | DBP 200434439 | 0.600 ppb |
2016-03-01 | DBP 200434518 | 0.500 ppb |
2016-03-01 | VOC1 200434428 | 0.800 ppb |
2016-03-01 | VOC1 200434431 | 0.600 ppb |
2016-03-01 | VOC1 200434429 | ND |
2016-03-01 | VOC1 200434430 | ND |
2016-03-01 | VOC1 200434474 | 1.20 ppb |
2016-03-02 | DBP 200434652 | 0.600 ppb |
2016-03-02 | DBP 200434653 | 0.600 ppb |
2016-03-03 | DBP 200434705 | 2.00 ppb |
2016-03-03 | DBP 200434734 | 2.30 ppb |
2016-03-03 | DBP 200434790 | ND |
2016-03-03 | DBP 200434791 | 0.800 ppb |
2016-03-03 | VOC1 200434800 | ND |
2016-03-04 | DBP 200434819 | 0.600 ppb |
2016-03-04 | DBP 200434820 | 0.600 ppb |
2016-06-01 | DBP 200441025 | ND |
2016-06-01 | DBP 200441026 | ND |
2016-06-01 | DBP 200441037 | ND |
2016-06-01 | DBP 200441054 | ND |
2016-06-01 | DBP 200441055 | ND |
2016-06-01 | DBP 200441056 | ND |
2016-06-01 | DBP 200441057 | 2.80 ppb |
2016-06-01 | DBP 200441058 | ND |
2016-06-02 | DBP 200441262 | 2.70 ppb |
2016-06-02 | DBP 200441297 | ND |
2016-06-02 | DBP 200441298 | ND |
2016-06-02 | DBP 200441299 | 0.700 ppb |
2016-09-06 | DBP 200448969 | 0.800 ppb |
2016-09-06 | DBP 200448974 | 0.900 ppb |
2016-09-06 | DBP 200449001 | 0.600 ppb |
2016-09-06 | DBP 200449014 | ND |
2016-09-06 | DBP 200449015 | 1.000 ppb |
2016-09-06 | DBP 200449016 | 0.800 ppb |
2016-09-07 | DBP 200449214 | 1.90 ppb |
2016-09-08 | DBP 200449407 | 0.600 ppb |
2016-09-08 | DBP 200449408 | 0.600 ppb |
2016-09-09 | DBP 200449500 | 0.600 ppb |
2016-09-12 | DBP 200449545 | 4.10 ppb |
2016-09-12 | DBP 200449547 | 5.00 ppb |
2016-12-05 | DBP 200456081 | 0.600 ppb |
2016-12-05 | DBP 200456083 | 0.900 ppb |
2016-12-06 | DBP 200456088 | 0.800 ppb |
2016-12-06 | DBP 200456110 | 1.000 ppb |
2016-12-06 | DBP 200456115 | 1.000 ppb |
2016-12-06 | DBP 200456175 | 0.800 ppb |
2016-12-07 | DBP 200456358 | 1.40 ppb |
2016-12-07 | DBP 200456359 | 0.700 ppb |
2016-12-08 | DBP 200456453 | ND |
2016-12-08 | DBP 200456460 | 0.900 ppb |
2016-12-08 | DBP 200456461 | 1.20 ppb |
2016-12-08 | DBP 200456462 | 2.00 ppb |
2017-02-27 | VOC1 200461316 | ND |
2017-02-27 | VOC1 200461317 | 0.800 ppb |
2017-02-27 | VOC1 200461301 | 0.700 ppb |
2017-02-28 | VOC1 200461369 | ND |
2017-02-28 | VOC1 200461372 | ND |
2017-02-28 | VOC1 200461370 | ND |
2017-02-28 | VOC1 200461371 | ND |
2017-02-28 | VOC1 200461405 | 1.40 ppb |
2017-02-28 | VOC1 200461407 | ND |
2017-03-01 | DBP 200461496 | 0.700 ppb |
2017-03-01 | DBP 200461542 | 0.700 ppb |
2017-03-01 | DBP 200461543 | 0.700 ppb |
2017-03-01 | DBP 200461544 | 0.700 ppb |
2017-03-01 | DBP 200461545 | 0.900 ppb |
2017-03-01 | DBP 200461546 | 1.10 ppb |
2017-03-02 | DBP 200461650 | 0.700 ppb |
2017-03-02 | DBP 200461651 | 0.700 ppb |
2017-03-02 | DBP 200461673 | 0.800 ppb |
2017-03-02 | DBP 200461674 | 0.800 ppb |
2017-03-02 | DBP 200461675 | 2.40 ppb |
2017-03-02 | VOC1 200461633 | 0.600 ppb |
2017-03-03 | DBP 200461727 | 1.70 ppb |
2017-06-05 | DBP 200468420 | ND |
2017-06-05 | DBP 200468421 | 0.900 ppb |
2017-06-06 | DBP 200468476 | 0.700 ppb |
2017-06-06 | DBP 200468481 | 0.800 ppb |
2017-06-06 | DBP 200468500 | ND |
2017-06-07 | DBP 200468669 | 2.70 ppb |
2017-06-07 | DBP 200468670 | ND |
2017-06-08 | DBP 200468850 | 2.60 ppb |
2017-06-08 | DBP 200468946 | 0.600 ppb |
2017-06-08 | DBP 200468947 | 0.600 ppb |
2017-06-08 | DBP 200468948 | 0.900 ppb |
2017-06-08 | DBP 200468949 | 2.00 ppb |
2017-06-19 | VOC1 200469687 | 2.80 ppb |
2017-06-19 | VOC1 200469688 | ND |
2017-09-05 | DBP 200475785 | 0.700 ppb |
2017-09-05 | DBP 200475790 | 0.800 ppb |
2017-09-05 | DBP 200475800 | 0.700 ppb |
2017-09-07 | DBP 200476104 | 3.60 ppb |
2017-09-07 | DBP 200476220 | 0.700 ppb |
2017-09-07 | DBP 200476221 | 0.800 ppb |
2017-09-07 | DBP 200476222 | 0.900 ppb |
2017-09-07 | DBP 200476224 | 1.40 ppb |
2017-09-08 | DBP 200476302 | 0.900 ppb |
2017-09-08 | DBP 200476304 | 0.900 ppb |
2017-09-08 | DBP 200476305 | 0.600 ppb |
2017-09-08 | DBP 200476306 | 4.30 ppb |
2017-12-05 | DBP 200483376 | 0.800 ppb |
2017-12-05 | DBP 200483381 | 0.800 ppb |
2017-12-05 | DBP 200483391 | 0.700 ppb |
2017-12-07 | DBP 200483770 | 0.700 ppb |
2017-12-07 | DBP 200483771 | 0.700 ppb |
2017-12-07 | DBP 200483772 | 0.600 ppb |
2017-12-07 | DBP 200483773 | 2.80 ppb |
2017-12-07 | DBP 200483774 | 0.600 ppb |
2017-12-08 | DBP 200483834 | 2.20 ppb |
2017-12-08 | DBP 200483843 | 0.900 ppb |
2017-12-08 | DBP 200483844 | 0.800 ppb |
2017-12-08 | DBP 200483845 | 1.000 ppb |
2018-03-05 | VOC1 200489156 | ND |
2018-03-05 | VOC1 200489128 | ND |
2018-03-05 | VOC1 200489129 | 1.20 ppb |
2018-03-05 | VOC1 200489150 | 0.500 ppb |
2018-03-06 | DBP 200489268 | ND |
2018-03-06 | DBP 200489275 | ND |
2018-03-06 | DBP 200489287 | ND |
2018-03-06 | VOC1 200489295 | 0.600 ppb |
2018-03-06 | VOC1 200489298 | 0.900 ppb |
2018-03-06 | VOC1 200489296 | ND |
2018-03-07 | DBP 200489537 | 2.20 ppb |
2018-03-07 | DBP 200489538 | 0.500 ppb |
2018-03-07 | DBP 200489539 | 0.500 ppb |
2018-03-07 | DBP 200489540 | ND |
2018-03-07 | DBP 200489541 | 0.700 ppb |
2018-03-08 | DBP 200489565 | 2.00 ppb |
2018-03-09 | DBP 200489701 | 0.500 ppb |
2018-03-09 | DBP 200489702 | 0.500 ppb |
2018-03-09 | DBP 200489703 | ND |
2018-06-05 | DBP 200495984 | 0.900 ppb |
2018-06-05 | DBP 200495989 | 0.900 ppb |
2018-06-05 | DBP 200496002 | 0.900 ppb |
2018-06-06 | DBP 200496235 | 0.800 ppb |
2018-06-07 | DBP 200496375 | 0.700 ppb |
2018-06-07 | DBP 200496376 | 0.800 ppb |
2018-06-07 | DBP 200496417 | 3.20 ppb |
2018-06-08 | DBP 200496507 | 1.10 ppb |
2018-06-08 | DBP 200496508 | 0.700 ppb |
2018-06-08 | DBP 200496509 | 1.10 ppb |
2018-06-08 | DBP 200496510 | 1.000 ppb |
2018-06-08 | DBP 200496511 | 1.000 ppb |
2018-08-17 | VOC1 200502735 | 2.00 ppb |
2018-09-04 | DBP 200503732 | 1.20 ppb |
2018-09-04 | DBP 200503737 | 1.10 ppb |
2018-09-04 | DBP 200503842 | 1.000 ppb |
2018-09-04 | DBP 200503912 | 1.000 ppb |
2018-09-04 | DBP 200503913 | 1.000 ppb |
2018-09-04 | DBP 200503914 | 1.30 ppb |
2018-09-05 | DBP 200503981 | 1.000 ppb |
2018-09-05 | DBP 200504086 | 1.000 ppb |
2018-09-05 | DBP 200504087 | 3.90 ppb |
2018-09-06 | DBP 200504185 | 4.70 ppb |
2018-09-06 | DBP 200504211 | 1.40 ppb |
2018-09-07 | DBP 200504441 | 1.30 ppb |
2018-11-29 | VOC1 200514106 | ND |
2018-11-29 | VOC1 200514121 | 1.80 ppb |
2018-12-03 | DBP 200514372 | 3.20 ppb |
2018-12-03 | DBP 200514406 | 1.20 ppb |
2018-12-04 | DBP 200514447 | 1.10 ppb |
2018-12-04 | DBP 200514452 | 1.10 ppb |
2018-12-04 | DBP 200514625 | 1.20 ppb |
2018-12-04 | DBP 200514626 | 1.30 ppb |
2018-12-04 | DBP 200514627 | 0.900 ppb |
2018-12-04 | DBP 200514628 | 0.700 ppb |
2018-12-04 | DBP 200514629 | 1.50 ppb |
2018-12-05 | DBP 200514952 | 0.900 ppb |
2018-12-06 | DBP 200515069 | 0.900 ppb |
2018-12-06 | DBP 200515070 | 0.800 ppb |
2019-03-04 | DBP 200523215 | 0.700 ppb |
2019-03-04 | DBP 200523217 | 0.800 ppb |
2019-03-04 | VOC1 200523150 | ND |
2019-03-04 | VOC1 200523151 | 0.900 ppb |
2019-03-04 | VOC1 200523175 | 0.600 ppb |
2019-03-04 | VOC1 200523176 | 1.80 ppb |
2019-03-05 | DBP 200523262 | 0.900 ppb |
2019-03-05 | DBP 200523269 | 0.800 ppb |
2019-03-05 | DBP 200523456 | 0.800 ppb |
2019-03-05 | DBP 200523457 | 0.900 ppb |
2019-03-05 | DBP 200523458 | 0.800 ppb |
2019-03-05 | DBP 200523459 | 1.10 ppb |
2019-03-05 | DBP 200523463 | 2.20 ppb |
2019-03-05 | VOC1 200523251 | 1.000 ppb |
2019-03-05 | VOC1 200523254 | 0.600 ppb |
2019-03-05 | VOC1 200523252 | ND |
2019-03-05 | VOC1 200523253 | ND |
2019-03-05 | VOC1 200523284 | 0.900 ppb |
2019-03-05 | VOC1 200523286 | ND |
2019-03-07 | DBP 200523884 | 0.700 ppb |
2019-03-08 | DBP 200524000 | 0.800 ppb |
2019-03-08 | DBP 200524002 | 0.800 ppb |
2019-05-08 | VOC1 200531298 | ND |
2019-06-03 | DBP 200534373 | 1.80 ppb |
2019-06-03 | DBP 200534414 | 3.30 ppb |
2019-06-04 | DBP 200534491 | 1.60 ppb |
2019-06-04 | DBP 200534496 | 1.60 ppb |
2019-06-04 | DBP 200534600 | 1.50 ppb |
2019-06-04 | DBP 200534725 | 2.70 ppb |
2019-06-04 | DBP 200534727 | 1.80 ppb |
2019-06-04 | DBP 200534729 | 1.90 ppb |
2019-06-05 | DBP 200535039 | 1.70 ppb |
2019-06-05 | DBP 200535041 | 1.40 ppb |
2019-06-06 | DBP 200535197 | 1.50 ppb |
2019-06-07 | DBP 200535357 | 1.50 ppb |
2019-09-03 | DBP 200546988 | 1.40 ppb |
2019-09-03 | DBP 200546993 | 1.70 ppb |
2019-09-04 | DBP 200547400 | 2.80 ppb |
2019-09-04 | DBP 200547402 | 1.50 ppb |
2019-09-04 | DBP 200547403 | 1.60 ppb |
2019-09-04 | DBP 200547404 | 1.80 ppb |
2019-09-04 | DBP 200547405 | 1.50 ppb |
2019-09-05 | DBP 200547460 | 3.40 ppb |
2019-09-05 | DBP 200547667 | 1.50 ppb |
2019-09-06 | DBP 200547826 | 1.30 ppb |
2019-09-06 | DBP 200547827 | 1.50 ppb |
2019-09-06 | DBP 200547828 | 1.20 ppb |
2019-12-02 | DBP 200558405 | 0.900 ppb |
2019-12-02 | DBP 200558406 | 1.30 ppb |
2019-12-02 | DBP 200558407 | 1.10 ppb |
2019-12-03 | DBP 200558454 | 1.000 ppb |
2019-12-03 | DBP 200558459 | 1.000 ppb |
2019-12-03 | DBP 200558612 | 1.000 ppb |
2019-12-04 | DBP 200558916 | 1.10 ppb |
2019-12-04 | DBP 200558917 | 1.20 ppb |
2019-12-04 | DBP 200558919 | 2.60 ppb |
2019-12-05 | DBP 200559073 | 1.000 ppb |
2019-12-05 | DBP 200559098 | 1.000 ppb |
2019-12-06 | DBP 200559195 | 1.000 ppb |