Bromodichloromethane
Grafton Waterworks
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 | 0.583 ppb | 26 | 6 | ND - 6.70 ppb |
2015 | 0.755 ppb | 26 | 10 | ND - 5.00 ppb |
2016 | 0.880 ppb | 26 | 12 | ND - 7.90 ppb |
2017 | 0.690 ppb | 24 | 8 | ND - 5.80 ppb |
2018 | 0.725 ppb | 25 | 9 | ND - 5.20 ppb |
2019 | 0.609 ppb | 30 | 9 | ND - 6.30 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 |
---|---|---|
2014-03-10 | 773674 | ND |
2014-03-10 | 773667 | ND |
2014-03-10 | 773656 | ND |
2014-03-10 | 773671 | ND |
2014-03-10 | 773659 | ND |
2014-03-10 | 773668 | 0.490 ppb |
2014-04-07 | 778332 | ND |
2014-04-07 | 778330 | ND |
2014-04-07 | 778325 | ND |
2014-04-07 | 778331 | ND |
2014-04-07 | 778326 | ND |
2014-04-07 | 778329 | 0.390 ppb |
2014-07-29 | 806739 | ND |
2014-07-29 | 806744 | ND |
2014-07-29 | 806738 | ND |
2014-07-29 | 806742 | ND |
2014-07-29 | 806743 | ND |
2014-07-29 | 806745 | ND |
2014-07-29 | 806747 | 5.90 ppb |
2014-07-29 | 806746 | 6.70 ppb |
2014-12-15 | 835979 | ND |
2014-12-15 | 835978 | ND |
2014-12-15 | 835983 | ND |
2014-12-15 | 835985 | ND |
2014-12-15 | 835982 | 0.480 ppb |
2014-12-15 | 835984 | 1.20 ppb |
2015-03-04 | 846466 | ND |
2015-03-04 | 846463 | ND |
2015-03-04 | 846449 | ND |
2015-03-04 | 846464 | ND |
2015-03-04 | 846451 | ND |
2015-03-04 | 846461 | 0.440 ppb |
2015-05-26 | 861799 | ND |
2015-05-26 | 861796 | ND |
2015-05-26 | 861792 | ND |
2015-05-26 | 861798 | ND |
2015-05-26 | 861793 | ND |
2015-05-26 | 861797 | 0.940 ppb |
2015-09-08 | 881969 | ND |
2015-09-08 | 881962 | ND |
2015-09-08 | 881968 | ND |
2015-09-08 | 881963 | ND |
2015-09-09 | 881966 | ND |
2015-09-09 | 881967 | 0.910 ppb |
2015-09-09 | 881971 | 3.80 ppb |
2015-09-09 | 881970 | 4.70 ppb |
2015-12-28 | 899817 | ND |
2015-12-28 | 899820 | 0.380 ppb |
2015-12-28 | 899819 | 0.510 ppb |
2015-12-28 | 899818 | 0.760 ppb |
2015-12-28 | 899814 | 2.20 ppb |
2015-12-28 | 899813 | 5.00 ppb |
2016-03-16 | 910611 | ND |
2016-03-16 | 910606 | ND |
2016-03-16 | 910599 | ND |
2016-03-16 | 910601 | ND |
2016-03-16 | 910609 | 0.520 ppb |
2016-03-16 | 910607 | 0.710 ppb |
2016-05-16 | 921438 | ND |
2016-05-16 | 921435 | ND |
2016-05-16 | 921431 | ND |
2016-05-16 | 921432 | 0.240 ppb |
2016-05-16 | 921437 | 0.510 ppb |
2016-05-16 | 921436 | 1.50 ppb |
2016-08-31 | 942867 | ND |
2016-08-31 | 942864 | ND |
2016-08-31 | 942860 | ND |
2016-08-31 | 942865 | 1.20 ppb |
2016-08-31 | 942861 | 1.60 ppb |
2016-09-01 | 942866 | 0.570 ppb |
2016-09-01 | 942870 | 6.90 ppb |
2016-09-01 | 942869 | 7.90 ppb |
2016-11-17 | 960029 | ND |
2016-11-17 | 960026 | ND |
2016-11-17 | 960022 | ND |
2016-11-17 | 960023 | ND |
2016-11-17 | 960028 | 0.360 ppb |
2016-11-17 | 960027 | 0.870 ppb |
2017-03-15 | 978080 | ND |
2017-03-15 | 978083 | ND |
2017-03-15 | 978086 | ND |
2017-03-16 | 978076 | ND |
2017-03-16 | 978077 | 0.600 ppb |
2017-03-16 | 978073 | 0.850 ppb |
2017-06-28 | 1001051 | ND |
2017-06-28 | 1001047 | ND |
2017-06-28 | 1001043 | ND |
2017-06-28 | 1001050 | ND |
2017-06-28 | 1001048 | 1.90 ppb |
2017-09-20 | 1019870 | ND |
2017-09-20 | 1019867 | ND |
2017-09-20 | 1019863 | ND |
2017-09-20 | 1019869 | ND |
2017-09-20 | 1019868 | 1.20 ppb |
2017-09-20 | 1019872 | 4.50 ppb |
2017-09-20 | 1019871 | 5.80 ppb |
2017-12-19 | 1034429 | ND |
2017-12-19 | 1034426 | ND |
2017-12-19 | 1034422 | ND |
2017-12-19 | 1034423 | ND |
2017-12-19 | 1034427 | 0.500 ppb |
2017-12-19 | 1034428 | 1.20 ppb |
2018-03-14 | 1045110 | ND |
2018-03-14 | 1045107 | ND |
2018-03-14 | 1045103 | ND |
2018-03-14 | 1045109 | ND |
2018-03-14 | 1045104 | ND |
2018-03-14 | 1045108 | 1.40 ppb |
2018-06-19 | 1062396 | ND |
2018-06-19 | 1062389 | ND |
2018-06-19 | 1062395 | ND |
2018-06-19 | 1062390 | ND |
2018-06-19 | 1062394 | 0.700 ppb |
2018-09-17 | 1080756 | ND |
2018-09-17 | 1080752 | ND |
2018-09-17 | 1080753 | ND |
2018-09-17 | 1080758 | 2.40 ppb |
2018-09-17 | 1080757 | 5.20 ppb |
2018-09-26 | 1083609 | ND |
2018-09-26 | 1083608 | 0.280 ppb |
2018-09-26 | 1083610 | 2.90 ppb |
2018-11-26 | 1094376 | ND |
2018-11-26 | 1094369 | ND |
2018-11-26 | 1094370 | 2.90 ppb |
2018-11-27 | 1094373 | ND |
2018-11-27 | 1094374 | 0.250 ppb |
2018-11-27 | 1094375 | 2.10 ppb |
2019-03-18 | 1110136 | ND |
2019-03-18 | 1110131 | ND |
2019-03-18 | 1110134 | ND |
2019-03-18 | 1110128 | ND |
2019-03-18 | 1110130 | ND |
2019-03-18 | 1110132 | 1.000 ppb |
2019-04-17 | 1116388 | 0.880 ppb |
2019-06-17 | 1128507 | ND |
2019-06-17 | 1128504 | ND |
2019-06-17 | 1128501 | ND |
2019-06-17 | 1128502 | ND |
2019-06-17 | 1128503 | ND |
2019-06-17 | 1128505 | 0.620 ppb |
2019-06-17 | 1128506 | 0.680 ppb |
2019-09-24 | 1151017 | ND |
2019-09-24 | 1151014 | ND |
2019-09-24 | 1151016 | ND |
2019-09-24 | 1151012 | ND |
2019-09-24 | 1151013 | ND |
2019-09-24 | 1151015 | 0.740 ppb |
2019-09-24 | 1151011 | 3.10 ppb |
2019-09-24 | 1151018 | 4.50 ppb |
2019-09-24 | 1151019 | 6.30 ppb |
2019-12-10 | 1164883 | ND |
2019-12-10 | 1164880 | ND |
2019-12-10 | 1164882 | ND |
2019-12-10 | 1164877 | ND |
2019-12-10 | 1164879 | ND |
2019-12-10 | 1164878 | ND |
2019-12-10 | 1164881 | 0.460 ppb |