Bromodichloromethane
Cal American Water Company
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 |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | 4.07 ppb | 32 | 32 | 1.60 ppb - 6.70 ppb |
2015 | 4.83 ppb | 32 | 32 | 3.20 ppb - 6.50 ppb |
2016 | 3.21 ppb | 33 | 33 | 1.70 ppb - 10.5 ppb |
2017 | 3.69 ppb | 32 | 32 | 1.70 ppb - 5.60 ppb |
2018 | 2.98 ppb | 32 | 32 | 1.30 ppb - 5.70 ppb |
2019 | 3.66 ppb | 32 | 32 | 1.30 ppb - 10.3 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 |
---|---|---|
2014-02-13 | 1225-006-1052 | 1.70 ppb |
2014-02-13 | 1225-007-1135 | 2.80 ppb |
2014-02-13 | 1225-008-1155 | 3.00 ppb |
2014-02-13 | 1225-009-1345 | 2.80 ppb |
2014-02-13 | 1225-010-1300 | 3.30 ppb |
2014-02-13 | 1225-011-1320 | 3.10 ppb |
2014-02-13 | 1225-012-0920 | 1.60 ppb |
2014-02-13 | 1225-013-1005 | 1.60 ppb |
2014-05-07 | 1225-006-1330 | 3.60 ppb |
2014-05-07 | 1225-007-1415 | 4.30 ppb |
2014-05-07 | 1225-008-0945 | 4.20 ppb |
2014-05-07 | 1225-009-1510 | 4.30 ppb |
2014-05-07 | 1225-010-1030 | 4.10 ppb |
2014-05-07 | 1225-011-1105 | 4.10 ppb |
2014-05-07 | 1225-012-1225 | 3.60 ppb |
2014-05-07 | 1225-013-1150 | 3.50 ppb |
2014-08-12 | 1225-006-1135 | 6.70 ppb |
2014-08-12 | 1225-007-1410 | 5.60 ppb |
2014-08-12 | 1225-008-1350 | 5.70 ppb |
2014-08-12 | 1225-009-1425 | 5.70 ppb |
2014-08-12 | 1225-010-1315 | 5.50 ppb |
2014-08-12 | 1225-011-1210 | 5.60 ppb |
2014-08-12 | 1225-012-1000 | 5.80 ppb |
2014-08-12 | 1225-013-1055 | 6.20 ppb |
2014-11-11 | 1225-006-1500 | 3.90 ppb |
2014-11-11 | 1225-007-1400 | 4.50 ppb |
2014-11-11 | 1225-008-1320 | 3.90 ppb |
2014-11-11 | 1225-009-1430 | 4.10 ppb |
2014-11-11 | 1225-010-1250 | 3.70 ppb |
2014-11-11 | 1225-011-1230 | 4.20 ppb |
2014-11-11 | 1225-012-1545 | 3.90 ppb |
2014-11-11 | 1225-013-1520 | 3.50 ppb |
2015-02-10 | 1225-006-1450 | 4.70 ppb |
2015-02-10 | 1225-007-0933 | 3.80 ppb |
2015-02-10 | 1225-008-1015 | 3.90 ppb |
2015-02-10 | 1225-009-1515 | 4.70 ppb |
2015-02-10 | 1225-010-1047 | 4.00 ppb |
2015-02-10 | 1225-011-1120 | 4.10 ppb |
2015-02-10 | 1225-012-1425 | 3.20 ppb |
2015-02-10 | 1225-013-1350 | 4.50 ppb |
2015-05-12 | 1225-006-1355 | 4.80 ppb |
2015-05-12 | 1225-007-1150 | 5.60 ppb |
2015-05-12 | 1225-008-1120 | 4.60 ppb |
2015-05-12 | 1225-009-1420 | 4.70 ppb |
2015-05-12 | 1225-010-1042 | 4.50 ppb |
2015-05-12 | 1225-011-1000 | 4.50 ppb |
2015-05-12 | 1225-012-1332 | 5.30 ppb |
2015-05-12 | 1225-013-1300 | 4.50 ppb |
2015-08-10 | 1225-006-1350 | 4.70 ppb |
2015-08-10 | 1225-007-1325 | 4.80 ppb |
2015-08-10 | 1225-008-1050 | 4.20 ppb |
2015-08-10 | 1225-009-1410 | 4.50 ppb |
2015-08-10 | 1225-010-1120 | 4.30 ppb |
2015-08-10 | 1225-011-1200 | 4.20 ppb |
2015-08-10 | 1225-012-0945 | 4.90 ppb |
2015-08-10 | 1225-013-1015 | 4.80 ppb |
2015-11-10 | 1225-006-1100 | 6.50 ppb |
2015-11-10 | 1225-007-1200 | 6.00 ppb |
2015-11-10 | 1225-008-1140 | 6.00 ppb |
2015-11-10 | 1225-009-0930 | 5.30 ppb |
2015-11-10 | 1225-010-1055 | 6.00 ppb |
2015-11-10 | 1225-011-0950 | 5.90 ppb |
2015-11-10 | 1225-012-1300 | 5.70 ppb |
2015-11-10 | 1225-013-1200 | 5.50 ppb |
2016-02-09 | 1225-006-1000 | 2.50 ppb |
2016-02-09 | 1225-007-1150 | 10.5 ppb |
2016-02-09 | 1225-008-0950 | 4.20 ppb |
2016-02-09 | 1225-009-1210 | 4.30 ppb |
2016-02-09 | 1225-010-1035 | 4.30 ppb |
2016-02-09 | 1225-011-1120 | 4.30 ppb |
2016-02-09 | 1225-012-1040 | 2.60 ppb |
2016-02-09 | 1225-013-1305 | 5.00 ppb |
2016-02-24 | 1225-007-1045 | 3.50 ppb |
2016-05-10 | 1225-006-0930 | 1.90 ppb |
2016-05-10 | 1225-007-1030 | 1.70 ppb |
2016-05-10 | 1225-008-0950 | 2.00 ppb |
2016-05-10 | 1225-009-1155 | 2.10 ppb |
2016-05-10 | 1225-010-1030 | 2.00 ppb |
2016-05-10 | 1225-011-1055 | 2.00 ppb |
2016-05-10 | 1225-012-1130 | 1.80 ppb |
2016-05-10 | 1225-013-1100 | 2.00 ppb |
2016-08-09 | 1225-006-1130 | 2.40 ppb |
2016-08-09 | 1225-007-1100 | 2.00 ppb |
2016-08-09 | 1225-008-1045 | 2.30 ppb |
2016-08-09 | 1225-009-1000 | 2.50 ppb |
2016-08-09 | 1225-010-1120 | 2.40 ppb |
2016-08-09 | 1225-011-0950 | 2.50 ppb |
2016-08-09 | 1225-012-1300 | 2.20 ppb |
2016-08-09 | 1225-013-1208 | 2.60 ppb |
2016-11-09 | 1225-006-1200 | 3.60 ppb |
2016-11-09 | 1225-007-1445 | 3.90 ppb |
2016-11-09 | 1225-008-1355 | 3.90 ppb |
2016-11-09 | 1225-009-1315 | 3.80 ppb |
2016-11-09 | 1225-010-1340 | 3.80 ppb |
2016-11-09 | 1225-012-1045 | 3.40 ppb |
2016-11-09 | 1225-013-1130 | 3.70 ppb |
2016-11-11 | 1225-011-1010 | 4.30 ppb |
2017-02-08 | 1225-006-1000 | 5.20 ppb |
2017-02-08 | 1225-007-1300 | 3.60 ppb |
2017-02-08 | 1225-008-1040 | 3.40 ppb |
2017-02-08 | 1225-009-1050 | 3.60 ppb |
2017-02-08 | 1225-010-1100 | 3.70 ppb |
2017-02-08 | 1225-011-1200 | 3.90 ppb |
2017-02-08 | 1225-012-1100 | 4.60 ppb |
2017-02-08 | 1225-013-1315 | 3.90 ppb |
2017-05-09 | 1225-006-1110 | 4.40 ppb |
2017-05-09 | 1225-007-1330 | 2.70 ppb |
2017-05-09 | 1225-008-1300 | 3.70 ppb |
2017-05-09 | 1225-009-1200 | 3.50 ppb |
2017-05-09 | 1225-010-1150 | 3.50 ppb |
2017-05-09 | 1225-011-1115 | 3.80 ppb |
2017-05-09 | 1225-012-1030 | 3.60 ppb |
2017-05-09 | 1225-013-1030 | 3.50 ppb |
2017-08-08 | 1225-006-1100 | 3.20 ppb |
2017-08-08 | 1225-007-1130 | 1.70 ppb |
2017-08-08 | 1225-008-1300 | 2.70 ppb |
2017-08-08 | 1225-009-1030 | 2.60 ppb |
2017-08-08 | 1225-010-1145 | 2.90 ppb |
2017-08-08 | 1225-011-1100 | 3.40 ppb |
2017-08-08 | 1225-012-1200 | 2.60 ppb |
2017-08-08 | 1225-013-1000 | 2.90 ppb |
2017-11-09 | 1225-006-1245 | 3.30 ppb |
2017-11-09 | 1225-007-1435 | 5.60 ppb |
2017-11-09 | 1225-008-1409 | 5.20 ppb |
2017-11-09 | 1225-009-1300 | 3.30 ppb |
2017-11-09 | 1225-010-1352 | 5.60 ppb |
2017-11-09 | 1225-011-1337 | 5.60 ppb |
2017-11-09 | 1225-012-1317 | 3.50 ppb |
2017-11-09 | 1225-013-1315 | 3.40 ppb |
2018-02-06 | 1225-006-1000 | 4.40 ppb |
2018-02-06 | 1225-007-1100 | 2.90 ppb |
2018-02-06 | 1225-008-1130 | 4.50 ppb |
2018-02-06 | 1225-009-1030 | 4.50 ppb |
2018-02-06 | 1225-010-1100 | 4.60 ppb |
2018-02-06 | 1225-011-1200 | 4.70 ppb |
2018-02-06 | 1225-012-1200 | 4.30 ppb |
2018-02-06 | 1225-013-1015 | 3.80 ppb |
2018-05-08 | 1225-006-0900 | 5.70 ppb |
2018-05-08 | 1225-007-1100 | 2.00 ppb |
2018-05-08 | 1225-008-1100 | 3.90 ppb |
2018-05-08 | 1225-009-0930 | 2.30 ppb |
2018-05-08 | 1225-010-1040 | 4.10 ppb |
2018-05-08 | 1225-011-1012 | 3.80 ppb |
2018-05-08 | 1225-012-1130 | 2.00 ppb |
2018-05-08 | 1225-013-0950 | 2.20 ppb |
2018-08-08 | 1225-006-1030 | 3.00 ppb |
2018-08-08 | 1225-007-1130 | 1.30 ppb |
2018-08-08 | 1225-008-1110 | 3.20 ppb |
2018-08-08 | 1225-009-1100 | 2.50 ppb |
2018-08-08 | 1225-010-1135 | 2.70 ppb |
2018-08-08 | 1225-011-1155 | 2.60 ppb |
2018-08-08 | 1225-012-1300 | 2.30 ppb |
2018-08-08 | 1225-013-1040 | 2.70 ppb |
2018-11-14 | 1225-006-1355 | 1.60 ppb |
2018-11-14 | 1225-007-1455 | 2.30 ppb |
2018-11-14 | 1225-008-1520 | 1.90 ppb |
2018-11-14 | 1225-009-1425 | 2.60 ppb |
2018-11-14 | 1225-010-1540 | 1.80 ppb |
2018-11-14 | 1225-011-1555 | 1.80 ppb |
2018-11-14 | 1225-012-1250 | 1.90 ppb |
2018-11-14 | 1225-013-1320 | 1.60 ppb |
2019-02-12 | 1225-006-1400 | 5.90 ppb |
2019-02-12 | 1225-007-1500 | 10.3 ppb |
2019-02-12 | 1225-008-1420 | 4.60 ppb |
2019-02-12 | 1225-009-1430 | 4.30 ppb |
2019-02-12 | 1225-010-1500 | 4.70 ppb |
2019-02-12 | 1225-011-1440 | 4.50 ppb |
2019-02-12 | 1225-012-1600 | 5.10 ppb |
2019-02-12 | 1225-013-1600 | 4.80 ppb |
2019-05-14 | 1225-006-1230 | 2.10 ppb |
2019-05-14 | 1225-007-1330 | 1.50 ppb |
2019-05-14 | 1225-008-1600 | 2.20 ppb |
2019-05-14 | 1225-009-1300 | 2.40 ppb |
2019-05-14 | 1225-010-1630 | 2.30 ppb |
2019-05-14 | 1225-011-1530 | 2.70 ppb |
2019-05-14 | 1225-012-1430 | 2.10 ppb |
2019-05-14 | 1225-013-1400 | 2.40 ppb |
2019-08-14 | 1225-006-1200 | 1.90 ppb |
2019-08-14 | 1225-007-1300 | 1.30 ppb |
2019-08-14 | 1225-008-1350 | 5.40 ppb |
2019-08-14 | 1225-009-1230 | 2.30 ppb |
2019-08-14 | 1225-010-1330 | 6.20 ppb |
2019-08-14 | 1225-011-1300 | 5.40 ppb |
2019-08-14 | 1225-012-1400 | 3.80 ppb |
2019-08-14 | 1225-013-1230 | 6.70 ppb |
2019-11-13 | 1225-006-1615 | 2.10 ppb |
2019-11-13 | 1225-007-1749 | 2.70 ppb |
2019-11-13 | 1225-009-1645 | 2.20 ppb |
2019-11-13 | 1225-010-1707 | 2.70 ppb |
2019-11-13 | 1225-011-1725 | 2.80 ppb |
2019-11-13 | 1225-012-1409 | 3.50 ppb |
2019-11-13 | 1225-013-1510 | 2.70 ppb |
2019-11-21 | 1225-008-1108 | 3.40 ppb |