Dibromochloromethane
Chesterfield County Central Water System
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.
226
Samples
0
Samples exceeding legal limit (MCL)
224
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2012 | 1.25 ppb | 41 | 41 | 0.550 ppb - 2.50 ppb |
| 2013 | 1.07 ppb | 45 | 43 | ND - 3.40 ppb |
| 2014 | 1.16 ppb | 30 | 30 | 0.500 ppb - 4.90 ppb |
| 2015 | 0.966 ppb | 41 | 41 | 0.500 ppb - 2.90 ppb |
| 2016 | 1.26 ppb | 33 | 33 | 0.500 ppb - 2.80 ppb |
| 2017 | 1.42 ppb | 36 | 36 | 0.520 ppb - 4.80 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 |
|---|---|---|
| 2012-02-14 | 201202160150TTHM | 0.660 ppb |
| 2012-02-14 | 2012022160147TTH | 0.630 ppb |
| 2012-02-14 | 201202160149TTHM | 0.620 ppb |
| 2012-02-14 | 201202160144TTHM | 0.590 ppb |
| 2012-02-14 | 201202160145TTHM | 0.580 ppb |
| 2012-02-14 | 201202160142TTHM | 0.580 ppb |
| 2012-02-14 | 201202160143TTHM | 0.580 ppb |
| 2012-02-14 | 201202160148TTHM | 0.550 ppb |
| 2012-05-15 | 201205170242TTHM | 1.000 ppb |
| 2012-05-15 | 201205170235TTHM | 1.40 ppb |
| 2012-05-15 | 201205170237TTHM | 1.30 ppb |
| 2012-05-15 | 201205170236TTHM | 1.30 ppb |
| 2012-05-15 | 201205170244TTHM | 1.20 ppb |
| 2012-05-15 | 201205170247TTHM | 1.20 ppb |
| 2012-05-15 | 201205170240TTHM | 1.20 ppb |
| 2012-05-15 | 201205170249TTHM | 1.10 ppb |
| 2012-05-15 | 201205170243TTHM | 0.860 ppb |
| 2012-08-15 | 201208160414TTHM | 1.000 ppb |
| 2012-08-15 | 201208160417TTHM | 1.000 ppb |
| 2012-08-15 | 201208160438TTHM | 2.50 ppb |
| 2012-08-15 | 201208160437TTHM | 2.40 ppb |
| 2012-08-15 | 2012081160436TTH | 2.20 ppb |
| 2012-08-15 | 201208160387TTHM | 2.10 ppb |
| 2012-08-15 | 201208160386TTHM | 2.00 ppb |
| 2012-08-15 | 201208160413TTHM | 1.90 ppb |
| 2012-08-15 | 201208160385TTHM | 1.90 ppb |
| 2012-08-15 | 201208160388TTHM | 1.20 ppb |
| 2012-08-15 | 201208160415TTHM | 1.10 ppb |
| 2012-08-15 | 201208160416TTHM | 1.10 ppb |
| 2012-11-15 | 201211160351TTHM | 2.30 ppb |
| 2012-11-15 | 201211160352TTHM | 2.20 ppb |
| 2012-11-15 | 201211160350TTHM | 2.20 ppb |
| 2012-11-15 | 201211160363TTHM | 1.30 ppb |
| 2012-11-15 | 201211160357TTHM | 1.20 ppb |
| 2012-11-15 | 201211160362TTHM | 1.20 ppb |
| 2012-11-15 | 201211160361TTHM | 1.10 ppb |
| 2012-11-15 | 201211160360TTHM | 0.940 ppb |
| 2012-11-15 | 201211160355TTHM | 0.940 ppb |
| 2012-11-15 | 201211160358TTHM | 0.810 ppb |
| 2012-11-15 | 201211160359TTHM | 0.720 ppb |
| 2012-11-15 | 201211160356TTHM | 0.560 ppb |
| 2013-02-13 | 20130215207TTHM | 1.000 ppb |
| 2013-02-13 | 20130215205TTHM | 1.000 ppb |
| 2013-02-13 | 201302150206TTHM | 1.10 ppb |
| 2013-02-13 | 201302150212TTHM | 0.910 ppb |
| 2013-02-13 | 201302150271TTHM | 0.820 ppb |
| 2013-02-13 | 201302150214TTHM | 0.730 ppb |
| 2013-02-13 | 201302150213TTHM | 0.690 ppb |
| 2013-02-13 | 201302150218TTHM | 0.530 ppb |
| 2013-05-14 | E130501441 | ND |
| 2013-05-14 | E130501440 | ND |
| 2013-05-16 | 201305170181TTHM | 1.000 ppb |
| 2013-05-16 | 201305170177TTHM | 1.20 ppb |
| 2013-05-16 | 201305170175TTHM | 1.10 ppb |
| 2013-05-16 | 201305170180TTHM | 0.970 ppb |
| 2013-05-16 | 201305170176TTHM | 0.950 ppb |
| 2013-05-16 | 201305170170TTHM | 0.880 ppb |
| 2013-05-16 | 210305170169TTHM | 0.870 ppb |
| 2013-05-16 | 201305170171TTHM | 0.800 ppb |
| 2013-05-16 | 201305170182TTHM | 0.780 ppb |
| 2013-05-16 | 201305170174TTHM | 0.750 ppb |
| 2013-05-16 | 201305170183TTHM | 0.730 ppb |
| 2013-08-13 | 201308140612TTHM | 1.40 ppb |
| 2013-08-13 | 201308140609TTHM | 1.30 ppb |
| 2013-08-13 | 201308170072TTHM | 1.20 ppb |
| 2013-08-13 | 201308140653TTHM | 1.10 ppb |
| 2013-08-13 | 201308140611TTHM | 0.990 ppb |
| 2013-08-13 | 201308140651TTHM | 0.940 ppb |
| 2013-08-13 | 201308140610TTHM | 0.930 ppb |
| 2013-08-13 | 201308140629TTHM | 0.890 ppb |
| 2013-08-13 | 201208140631TTHM | 0.810 ppb |
| 2013-08-13 | 201308140652TTHM | 0.770 ppb |
| 2013-08-13 | 201308140630TTHM | 0.680 ppb |
| 2013-08-13 | 201308140608TTHM | 0.630 ppb |
| 2013-11-13 | 201311141040TTHM | 1.000 ppb |
| 2013-11-13 | 201311141033TTHM | 3.40 ppb |
| 2013-11-13 | 201311141032TTHM | 3.10 ppb |
| 2013-11-13 | 201311141030TTHM | 1.50 ppb |
| 2013-11-13 | 201311141024TTHM | 1.40 ppb |
| 2013-11-13 | 201311141026TTHM | 1.40 ppb |
| 2013-11-13 | 201311141031TTHM | 1.40 ppb |
| 2013-11-13 | 201311141025TTHM | 1.30 ppb |
| 2013-11-13 | 201311141029TTHM | 1.30 ppb |
| 2013-11-13 | 201311141027TTHM | 1.30 ppb |
| 2013-11-13 | 201311141041TTHM | 1.20 ppb |
| 2013-11-13 | 201311141039TTHM | 1.20 ppb |
| 2014-02-11 | 201402121026TTHM | 0.990 ppb |
| 2014-02-11 | 201402121022TTHM | 0.500 ppb |
| 2014-05-14 | 201405150462TTHM | 0.600 ppb |
| 2014-05-14 | 201405150475TTHM | 0.520 ppb |
| 2014-08-12 | 201408130490TTHM | 4.90 ppb |
| 2014-08-12 | 201408130487TTHM | 3.30 ppb |
| 2014-08-12 | 201408130246TTHM | 1.50 ppb |
| 2014-08-12 | 201408130247TTHM | 1.40 ppb |
| 2014-08-12 | 201408130248TTHM | 1.20 ppb |
| 2014-08-12 | 201408130489TTHM | 1.20 ppb |
| 2014-08-12 | 201408130488TTHM | 1.20 ppb |
| 2014-08-12 | 201408130486TTHM | 1.20 ppb |
| 2014-08-12 | 201408130563TTHM | 1.10 ppb |
| 2014-08-12 | 201408130249TTHM | 1.10 ppb |
| 2014-08-12 | 201408130562TTHM | 0.840 ppb |
| 2014-08-12 | 201408130561TTHM | 0.810 ppb |
| 2014-08-22 | E140801008 | 1.40 ppb |
| 2014-08-22 | E140801006 | 1.30 ppb |
| 2014-08-22 | E140801007 | 1.30 ppb |
| 2014-08-22 | E140801005 | 0.900 ppb |
| 2014-11-12 | 201411130870TTHM | 1.000 ppb |
| 2014-11-12 | 201411130869TTHM | 0.960 ppb |
| 2014-11-12 | 201411130866TTHM | 0.820 ppb |
| 2014-11-12 | 201411130871TTHM | 0.780 ppb |
| 2014-11-12 | 201411130859TTHM | 0.730 ppb |
| 2014-11-12 | 201411130862TTHM | 0.710 ppb |
| 2014-11-12 | 201411130861TTHM | 0.710 ppb |
| 2014-11-12 | 201411130867TTHM | 0.620 ppb |
| 2014-11-12 | 201411130865TTHM | 0.590 ppb |
| 2014-11-12 | 201411130860TTHM | 0.560 ppb |
| 2015-02-11 | 00127_EXP-EUROFI | 1.10 ppb |
| 2015-02-11 | 00127_EXP-EUROFI | 0.960 ppb |
| 2015-02-11 | 00127_EXP-EUROFI | 0.950 ppb |
| 2015-02-11 | 00127_EXP-EUROFI | 0.870 ppb |
| 2015-02-11 | 00127_EXP-EUROFI | 0.860 ppb |
| 2015-02-11 | 00127_EXP-EUROFI | 0.820 ppb |
| 2015-02-11 | 00127_EXP-EUROFI | 0.820 ppb |
| 2015-02-11 | 00127_EXP-EUROFI | 0.650 ppb |
| 2015-02-11 | 00127_EXP-EUROFI | 0.640 ppb |
| 2015-02-11 | 00127_EXP-EUROFI | 0.570 ppb |
| 2015-02-11 | 00127_EXP-EUROFI | 0.520 ppb |
| 2015-05-12 | 460260-EUROFINS | 1.10 ppb |
| 2015-05-12 | 460260-EUROFINS | 0.910 ppb |
| 2015-05-12 | 460260-EUROFINS | 0.830 ppb |
| 2015-05-12 | 460260-EUROFINS | 0.600 ppb |
| 2015-05-12 | 460260-EUROFINS | 0.590 ppb |
| 2015-05-12 | 460260-EUROFINS | 0.550 ppb |
| 2015-05-12 | 460260-EUROFINS | 0.550 ppb |
| 2015-05-12 | 460260-EUROFINS | 0.530 ppb |
| 2015-05-12 | 460260-EUROFINS | 0.500 ppb |
| 2015-08-12 | 460260-EUROFINS | 2.90 ppb |
| 2015-08-12 | 460260-EUROFINS | 2.20 ppb |
| 2015-08-12 | 460260-EUROFINS | 2.10 ppb |
| 2015-08-12 | 460260-EUROFINS | 1.40 ppb |
| 2015-08-12 | 460260-EUROFINS | 1.40 ppb |
| 2015-08-12 | 460260-EUROFINS | 1.30 ppb |
| 2015-08-12 | 460260-EUROFINS | 1.30 ppb |
| 2015-08-12 | 460260-EUROFINS | 1.20 ppb |
| 2015-08-12 | 460260-EUROFINS | 1.10 ppb |
| 2015-08-12 | 460260-EUROFINS | 0.880 ppb |
| 2015-08-12 | 460260-EUROFINS | 0.840 ppb |
| 2015-08-12 | 460260-EUROFINS | 0.520 ppb |
| 2015-11-11 | 460260-EUROFINS | 1.10 ppb |
| 2015-11-11 | 460260-EUROFINS | 1.000 ppb |
| 2015-11-11 | 460260-EUROFINS | 0.940 ppb |
| 2015-11-11 | 460260-EUROFINS | 0.870 ppb |
| 2015-11-11 | 460260-EUROFINS | 0.860 ppb |
| 2015-11-11 | 460260-EUROFINS | 0.770 ppb |
| 2015-11-11 | 460260-EUROFINS | 0.720 ppb |
| 2015-11-11 | 460260-EUROFINS | 0.720 ppb |
| 2015-11-11 | 460260-EUROFINS | 0.560 ppb |
| 2016-02-09 | 201602100614TTHM | 0.660 ppb |
| 2016-02-09 | 201602110056TTHM | 0.530 ppb |
| 2016-02-09 | 201602100510TTHM | 0.500 ppb |
| 2016-05-10 | 201605110490TTHM | 1.000 ppb |
| 2016-05-10 | 201605110700TTHM | 1.000 ppb |
| 2016-05-10 | 201605110487TTHM | 0.950 ppb |
| 2016-05-10 | 201605110488TTHM | 0.930 ppb |
| 2016-05-10 | 201605110701TTHM | 0.910 ppb |
| 2016-05-10 | 201605110697TTHM | 0.900 ppb |
| 2016-05-10 | 201605110731TTHM | 0.810 ppb |
| 2016-05-10 | 201605110699TTHM | 0.770 ppb |
| 2016-05-10 | 201605110729TTHM | 0.720 ppb |
| 2016-05-10 | 201605110698TTHM | 0.700 ppb |
| 2016-05-10 | 201605110730TTHM | 0.540 ppb |
| 2016-05-10 | 201605110489TTHM | 0.520 ppb |
| 2016-08-09 | 201608100672TTHM | 2.80 ppb |
| 2016-08-09 | 201608100680TTHM | 2.70 ppb |
| 2016-08-09 | 201608100682TTHM | 2.20 ppb |
| 2016-08-09 | 201608100671TTHM | 2.00 ppb |
| 2016-08-09 | 201608100776TTHM | 2.00 ppb |
| 2016-08-09 | 201608100681TTHM | 1.90 ppb |
| 2016-08-09 | 201608100683TTHM | 1.90 ppb |
| 2016-08-09 | 201608100670TTHM | 1.70 ppb |
| 2016-08-09 | 201608100780TTHM | 1.40 ppb |
| 2016-08-09 | 201608100779TTHM | 1.30 ppb |
| 2016-08-09 | 201608100777TTHM | 1.20 ppb |
| 2016-08-09 | 201608100778TTHM | 1.20 ppb |
| 2016-11-08 | 201611100311TTHM | 2.20 ppb |
| 2016-11-08 | 201611100308TTHM | 2.10 ppb |
| 2016-11-08 | 201611100307TTHM | 1.80 ppb |
| 2016-11-08 | 201611100508TTHM | 0.600 ppb |
| 2016-11-08 | 201611100305TTHM | 0.550 ppb |
| 2016-11-08 | 201611100310TTHM | 0.500 ppb |
| 2017-02-07 | 201702080870TTHM | 0.520 ppb |
| 2017-04-20 | E170304722 | 0.800 ppb |
| 2017-05-09 | 201705101017TTHM | 1.30 ppb |
| 2017-05-09 | 201705101018TTHM | 1.20 ppb |
| 2017-05-09 | 201705100777TTHM | 1.000 ppb |
| 2017-05-09 | 201705101019TTHM | 0.970 ppb |
| 2017-05-09 | 201705100753TTHM | 0.950 ppb |
| 2017-05-09 | 201705100752TTHM | 0.880 ppb |
| 2017-05-09 | 201705100776TTHM | 0.680 ppb |
| 2017-05-09 | 201705100774TTHM | 0.680 ppb |
| 2017-05-09 | 201705100775TTHM | 0.640 ppb |
| 2017-05-09 | 201705100751TTHM | 0.610 ppb |
| 2017-08-08 | 201708091232TTHM | 4.80 ppb |
| 2017-08-08 | 201708091231TTHM | 4.20 ppb |
| 2017-08-08 | 201708091235TTHM | 4.10 ppb |
| 2017-08-08 | 201708091234TTHM | 2.50 ppb |
| 2017-08-08 | 201708091258TTHM | 1.80 ppb |
| 2017-08-08 | 201708091257TTHM | 1.60 ppb |
| 2017-08-08 | 201708091259TTHM | 1.50 ppb |
| 2017-08-08 | 201708091233TTHM | 1.40 ppb |
| 2017-08-08 | 201708090889TTHM | 1.30 ppb |
| 2017-08-08 | 201708090886TTHM | 1.10 ppb |
| 2017-08-08 | 201708090887TTHM | 1.10 ppb |
| 2017-08-08 | 201708090888TTHM | 0.950 ppb |
| 2017-11-07 | 201711080407TTHM | 1.40 ppb |
| 2017-11-07 | 201711080595TTHM | 1.40 ppb |
| 2017-11-07 | 201711080549TTHM | 1.30 ppb |
| 2017-11-07 | 201711080550TTHM | 1.30 ppb |
| 2017-11-07 | 201711080409TTHM | 1.30 ppb |
| 2017-11-07 | 201711080410TTHM | 1.30 ppb |
| 2017-11-07 | 201711080548TTHM | 1.20 ppb |
| 2017-11-07 | 201711080408TTHM | 1.20 ppb |
| 2017-11-07 | 201711080591TTHM | 1.20 ppb |
| 2017-11-07 | 201711080593TTHM | 1.20 ppb |
| 2017-11-07 | 201711080594TTHM | 0.960 ppb |
| 2017-11-07 | 201711080592TTHM | 0.720 ppb |