Dibromochloromethane
Cal American Water Company
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 |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | 7.92 ppb | 32 | 32 | 5.10 ppb - 10.7 ppb |
2015 | 8.76 ppb | 32 | 32 | 6.40 ppb - 11.6 ppb |
2016 | 9.70 ppb | 33 | 33 | 6.30 ppb - 31.2 ppb |
2017 | 9.25 ppb | 32 | 32 | 5.30 ppb - 13.2 ppb |
2018 | 5.48 ppb | 32 | 32 | 2.80 ppb - 10.00 ppb |
2019 | 8.37 ppb | 32 | 32 | 3.40 ppb - 20.4 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 |
---|---|---|
2014-02-13 | 1225-006-1052 | 5.50 ppb |
2014-02-13 | 1225-007-1135 | 7.80 ppb |
2014-02-13 | 1225-008-1155 | 7.60 ppb |
2014-02-13 | 1225-009-1345 | 8.00 ppb |
2014-02-13 | 1225-010-1300 | 8.30 ppb |
2014-02-13 | 1225-011-1320 | 7.70 ppb |
2014-02-13 | 1225-012-0920 | 5.10 ppb |
2014-02-13 | 1225-013-1005 | 5.20 ppb |
2014-05-07 | 1225-006-1330 | 7.30 ppb |
2014-05-07 | 1225-007-1415 | 8.00 ppb |
2014-05-07 | 1225-008-0945 | 7.80 ppb |
2014-05-07 | 1225-009-1510 | 7.90 ppb |
2014-05-07 | 1225-010-1030 | 7.60 ppb |
2014-05-07 | 1225-011-1105 | 7.50 ppb |
2014-05-07 | 1225-012-1225 | 7.40 ppb |
2014-05-07 | 1225-013-1150 | 7.20 ppb |
2014-08-12 | 1225-006-1135 | 10.5 ppb |
2014-08-12 | 1225-007-1410 | 9.80 ppb |
2014-08-12 | 1225-008-1350 | 9.10 ppb |
2014-08-12 | 1225-009-1425 | 10.00 ppb |
2014-08-12 | 1225-010-1315 | 8.70 ppb |
2014-08-12 | 1225-011-1210 | 9.30 ppb |
2014-08-12 | 1225-012-1000 | 10.00 ppb |
2014-08-12 | 1225-013-1055 | 10.7 ppb |
2014-11-11 | 1225-006-1500 | 7.00 ppb |
2014-11-11 | 1225-007-1400 | 7.70 ppb |
2014-11-11 | 1225-008-1320 | 7.40 ppb |
2014-11-11 | 1225-009-1430 | 7.60 ppb |
2014-11-11 | 1225-010-1250 | 7.30 ppb |
2014-11-11 | 1225-011-1230 | 8.50 ppb |
2014-11-11 | 1225-012-1545 | 6.60 ppb |
2014-11-11 | 1225-013-1520 | 7.40 ppb |
2015-02-10 | 1225-006-1450 | 8.50 ppb |
2015-02-10 | 1225-007-0933 | 8.50 ppb |
2015-02-10 | 1225-008-1015 | 9.60 ppb |
2015-02-10 | 1225-009-1515 | 9.80 ppb |
2015-02-10 | 1225-010-1047 | 9.80 ppb |
2015-02-10 | 1225-011-1120 | 9.90 ppb |
2015-02-10 | 1225-012-1425 | 6.40 ppb |
2015-02-10 | 1225-013-1350 | 9.70 ppb |
2015-05-12 | 1225-006-1355 | 8.30 ppb |
2015-05-12 | 1225-007-1150 | 10.3 ppb |
2015-05-12 | 1225-008-1120 | 8.00 ppb |
2015-05-12 | 1225-009-1420 | 7.70 ppb |
2015-05-12 | 1225-010-1042 | 8.00 ppb |
2015-05-12 | 1225-011-1000 | 7.60 ppb |
2015-05-12 | 1225-012-1332 | 8.90 ppb |
2015-05-12 | 1225-013-1300 | 7.70 ppb |
2015-08-10 | 1225-006-1350 | 7.20 ppb |
2015-08-10 | 1225-007-1325 | 8.10 ppb |
2015-08-10 | 1225-008-1050 | 6.90 ppb |
2015-08-10 | 1225-009-1410 | 7.50 ppb |
2015-08-10 | 1225-010-1120 | 6.70 ppb |
2015-08-10 | 1225-011-1200 | 6.60 ppb |
2015-08-10 | 1225-012-0945 | 7.40 ppb |
2015-08-10 | 1225-013-1015 | 7.30 ppb |
2015-11-10 | 1225-006-1100 | 11.6 ppb |
2015-11-10 | 1225-007-1200 | 10.2 ppb |
2015-11-10 | 1225-008-1140 | 9.40 ppb |
2015-11-10 | 1225-009-0930 | 10.7 ppb |
2015-11-10 | 1225-010-1055 | 9.80 ppb |
2015-11-10 | 1225-011-0950 | 9.80 ppb |
2015-11-10 | 1225-012-1300 | 11.4 ppb |
2015-11-10 | 1225-013-1200 | 11.0 ppb |
2016-02-09 | 1225-006-1000 | 9.00 ppb |
2016-02-09 | 1225-007-1150 | 31.2 ppb |
2016-02-09 | 1225-008-0950 | 9.50 ppb |
2016-02-09 | 1225-009-1210 | 9.80 ppb |
2016-02-09 | 1225-010-1035 | 9.50 ppb |
2016-02-09 | 1225-011-1120 | 9.70 ppb |
2016-02-09 | 1225-012-1040 | 9.10 ppb |
2016-02-09 | 1225-013-1305 | 10.7 ppb |
2016-02-24 | 1225-007-1045 | 10.2 ppb |
2016-05-10 | 1225-006-0930 | 7.40 ppb |
2016-05-10 | 1225-007-1030 | 6.30 ppb |
2016-05-10 | 1225-008-0950 | 7.30 ppb |
2016-05-10 | 1225-009-1155 | 7.20 ppb |
2016-05-10 | 1225-010-1030 | 7.30 ppb |
2016-05-10 | 1225-011-1055 | 7.30 ppb |
2016-05-10 | 1225-012-1130 | 7.00 ppb |
2016-05-10 | 1225-013-1100 | 7.00 ppb |
2016-08-09 | 1225-006-1130 | 9.00 ppb |
2016-08-09 | 1225-007-1100 | 7.20 ppb |
2016-08-09 | 1225-008-1045 | 8.30 ppb |
2016-08-09 | 1225-009-1000 | 8.60 ppb |
2016-08-09 | 1225-010-1120 | 8.50 ppb |
2016-08-09 | 1225-011-0950 | 8.70 ppb |
2016-08-09 | 1225-012-1300 | 7.40 ppb |
2016-08-09 | 1225-013-1208 | 8.30 ppb |
2016-11-09 | 1225-006-1200 | 10.4 ppb |
2016-11-09 | 1225-007-1445 | 10.6 ppb |
2016-11-09 | 1225-008-1355 | 10.6 ppb |
2016-11-09 | 1225-009-1315 | 10.6 ppb |
2016-11-09 | 1225-010-1340 | 10.5 ppb |
2016-11-09 | 1225-012-1045 | 10.2 ppb |
2016-11-09 | 1225-013-1130 | 10.5 ppb |
2016-11-11 | 1225-011-1010 | 15.1 ppb |
2017-02-08 | 1225-006-1000 | 13.2 ppb |
2017-02-08 | 1225-007-1300 | 9.30 ppb |
2017-02-08 | 1225-008-1040 | 9.90 ppb |
2017-02-08 | 1225-009-1050 | 10.3 ppb |
2017-02-08 | 1225-010-1100 | 10.4 ppb |
2017-02-08 | 1225-011-1200 | 11.0 ppb |
2017-02-08 | 1225-012-1100 | 12.6 ppb |
2017-02-08 | 1225-013-1315 | 10.4 ppb |
2017-05-09 | 1225-006-1110 | 10.6 ppb |
2017-05-09 | 1225-007-1330 | 7.40 ppb |
2017-05-09 | 1225-008-1300 | 9.60 ppb |
2017-05-09 | 1225-009-1200 | 9.50 ppb |
2017-05-09 | 1225-010-1150 | 9.90 ppb |
2017-05-09 | 1225-011-1115 | 10.1 ppb |
2017-05-09 | 1225-012-1030 | 10.1 ppb |
2017-05-09 | 1225-013-1030 | 9.60 ppb |
2017-08-08 | 1225-006-1100 | 9.20 ppb |
2017-08-08 | 1225-007-1130 | 5.30 ppb |
2017-08-08 | 1225-008-1300 | 7.30 ppb |
2017-08-08 | 1225-009-1030 | 7.40 ppb |
2017-08-08 | 1225-010-1145 | 7.80 ppb |
2017-08-08 | 1225-011-1100 | 9.50 ppb |
2017-08-08 | 1225-012-1200 | 7.50 ppb |
2017-08-08 | 1225-013-1000 | 8.40 ppb |
2017-11-09 | 1225-006-1245 | 6.50 ppb |
2017-11-09 | 1225-007-1435 | 11.0 ppb |
2017-11-09 | 1225-008-1409 | 10.3 ppb |
2017-11-09 | 1225-009-1300 | 6.60 ppb |
2017-11-09 | 1225-010-1352 | 10.9 ppb |
2017-11-09 | 1225-011-1337 | 11.0 ppb |
2017-11-09 | 1225-012-1317 | 6.80 ppb |
2017-11-09 | 1225-013-1315 | 6.50 ppb |
2018-02-06 | 1225-006-1000 | 7.30 ppb |
2018-02-06 | 1225-007-1100 | 5.10 ppb |
2018-02-06 | 1225-008-1130 | 7.00 ppb |
2018-02-06 | 1225-009-1030 | 7.20 ppb |
2018-02-06 | 1225-010-1100 | 7.20 ppb |
2018-02-06 | 1225-011-1200 | 7.40 ppb |
2018-02-06 | 1225-012-1200 | 7.10 ppb |
2018-02-06 | 1225-013-1015 | 6.70 ppb |
2018-05-08 | 1225-006-0900 | 10.00 ppb |
2018-05-08 | 1225-007-1100 | 3.80 ppb |
2018-05-08 | 1225-008-1100 | 6.80 ppb |
2018-05-08 | 1225-009-0930 | 5.00 ppb |
2018-05-08 | 1225-010-1040 | 7.40 ppb |
2018-05-08 | 1225-011-1012 | 6.70 ppb |
2018-05-08 | 1225-012-1130 | 4.20 ppb |
2018-05-08 | 1225-013-0950 | 5.10 ppb |
2018-08-08 | 1225-006-1030 | 5.20 ppb |
2018-08-08 | 1225-007-1130 | 2.80 ppb |
2018-08-08 | 1225-008-1110 | 5.20 ppb |
2018-08-08 | 1225-009-1100 | 4.30 ppb |
2018-08-08 | 1225-010-1135 | 4.50 ppb |
2018-08-08 | 1225-011-1155 | 4.30 ppb |
2018-08-08 | 1225-012-1300 | 4.20 ppb |
2018-08-08 | 1225-013-1040 | 4.90 ppb |
2018-11-14 | 1225-006-1355 | 3.80 ppb |
2018-11-14 | 1225-007-1455 | 4.90 ppb |
2018-11-14 | 1225-008-1520 | 4.60 ppb |
2018-11-14 | 1225-009-1425 | 5.50 ppb |
2018-11-14 | 1225-010-1540 | 4.20 ppb |
2018-11-14 | 1225-011-1555 | 4.20 ppb |
2018-11-14 | 1225-012-1250 | 4.90 ppb |
2018-11-14 | 1225-013-1320 | 4.00 ppb |
2019-02-12 | 1225-006-1400 | 11.6 ppb |
2019-02-12 | 1225-007-1500 | 20.4 ppb |
2019-02-12 | 1225-008-1420 | 12.0 ppb |
2019-02-12 | 1225-009-1430 | 11.2 ppb |
2019-02-12 | 1225-010-1500 | 12.4 ppb |
2019-02-12 | 1225-011-1440 | 12.4 ppb |
2019-02-12 | 1225-012-1600 | 10.9 ppb |
2019-02-12 | 1225-013-1600 | 11.6 ppb |
2019-05-14 | 1225-006-1230 | 5.20 ppb |
2019-05-14 | 1225-007-1330 | 3.40 ppb |
2019-05-14 | 1225-008-1600 | 5.10 ppb |
2019-05-14 | 1225-009-1300 | 5.70 ppb |
2019-05-14 | 1225-010-1630 | 5.00 ppb |
2019-05-14 | 1225-011-1530 | 5.90 ppb |
2019-05-14 | 1225-012-1430 | 5.30 ppb |
2019-05-14 | 1225-013-1400 | 5.20 ppb |
2019-08-14 | 1225-006-1200 | 4.50 ppb |
2019-08-14 | 1225-007-1300 | 3.40 ppb |
2019-08-14 | 1225-008-1350 | 12.0 ppb |
2019-08-14 | 1225-009-1230 | 5.00 ppb |
2019-08-14 | 1225-010-1330 | 14.3 ppb |
2019-08-14 | 1225-011-1300 | 12.9 ppb |
2019-08-14 | 1225-012-1400 | 8.90 ppb |
2019-08-14 | 1225-013-1230 | 15.5 ppb |
2019-11-13 | 1225-006-1615 | 4.90 ppb |
2019-11-13 | 1225-007-1749 | 5.50 ppb |
2019-11-13 | 1225-009-1645 | 5.30 ppb |
2019-11-13 | 1225-010-1707 | 5.50 ppb |
2019-11-13 | 1225-011-1725 | 5.80 ppb |
2019-11-13 | 1225-012-1409 | 7.60 ppb |
2019-11-13 | 1225-013-1510 | 5.00 ppb |
2019-11-21 | 1225-008-1108 | 8.40 ppb |