Bromodichloromethane
Vallecitos Water District
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 | 8.60 ppb | 32 | 32 | 6.70 ppb - 11.0 ppb |
2015 | 8.35 ppb | 32 | 32 | 7.30 ppb - 9.50 ppb |
2016 | 5.97 ppb | 32 | 29 | ND - 13.0 ppb |
2017 | 9.76 ppb | 32 | 31 | ND - 25.0 ppb |
2018 | 6.95 ppb | 32 | 32 | 3.80 ppb - 16.0 ppb |
2019 | 8.16 ppb | 32 | 32 | 2.20 ppb - 22.0 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 |
---|---|---|
2014-01-15 | 2706-900-0915 | 6.70 ppb |
2014-01-15 | 2706-901-1100 | 6.90 ppb |
2014-01-15 | 2706-902-0940 | 7.30 ppb |
2014-01-15 | 2706-903-1025 | 7.30 ppb |
2014-01-15 | 2706-904-1015 | 7.20 ppb |
2014-01-15 | 2706-905-0845 | 7.30 ppb |
2014-01-15 | 2706-906-0905 | 7.50 ppb |
2014-01-15 | 2706-907-0810 | 7.70 ppb |
2014-04-16 | 2706-900-0910 | 11.0 ppb |
2014-04-16 | 2706-901-0730 | 9.90 ppb |
2014-04-16 | 2706-902-1110 | 9.90 ppb |
2014-04-16 | 2706-903-1040 | 11.0 ppb |
2014-04-16 | 2706-904-0950 | 10.00 ppb |
2014-04-16 | 2706-905-0840 | 11.0 ppb |
2014-04-16 | 2706-906-1140 | 8.70 ppb |
2014-04-16 | 2706-907-1200 | 9.80 ppb |
2014-07-16 | 2706-900-1035 | 6.70 ppb |
2014-07-16 | 2706-901-1125 | 8.20 ppb |
2014-07-16 | 2706-902-0825 | 7.50 ppb |
2014-07-16 | 2706-903-0750 | 6.90 ppb |
2014-07-16 | 2706-904-1000 | 7.80 ppb |
2014-07-16 | 2706-905-1055 | 7.10 ppb |
2014-07-16 | 2706-906-0855 | 8.90 ppb |
2014-07-16 | 2706-907-0930 | 7.60 ppb |
2014-10-15 | 2706-900-1145 | 8.60 ppb |
2014-10-15 | 2706-901-1010 | 10.00 ppb |
2014-10-15 | 2706-902-1215 | 8.80 ppb |
2014-10-15 | 2706-903-1145 | 9.80 ppb |
2014-10-15 | 2706-904-1100 | 9.00 ppb |
2014-10-15 | 2706-905-1115 | 9.00 ppb |
2014-10-15 | 2706-906-1015 | 9.00 ppb |
2014-10-15 | 2706-907-1050 | 11.0 ppb |
2015-01-21 | 2706-900-1050 | 8.60 ppb |
2015-01-21 | 2706-901-0900 | 9.40 ppb |
2015-01-21 | 2706-902-1100 | 8.40 ppb |
2015-01-21 | 2706-903-1130 | 8.30 ppb |
2015-01-21 | 2706-904-1115 | 9.00 ppb |
2015-01-21 | 2706-905-0955 | 8.70 ppb |
2015-01-21 | 2706-906-1030 | 7.40 ppb |
2015-01-21 | 2706-907-1000 | 8.90 ppb |
2015-04-15 | 2706-900-0910 | 8.20 ppb |
2015-04-15 | 2706-901-0830 | 8.00 ppb |
2015-04-15 | 2706-902-0850 | 8.30 ppb |
2015-04-15 | 2706-903-0805 | 8.80 ppb |
2015-04-15 | 2706-904-1000 | 8.80 ppb |
2015-04-15 | 2706-905-0930 | 8.30 ppb |
2015-04-15 | 2706-906-0940 | 7.50 ppb |
2015-04-15 | 2706-907-1015 | 9.50 ppb |
2015-07-15 | 2706-900-1015 | 8.00 ppb |
2015-07-15 | 2706-901-0920 | 7.50 ppb |
2015-07-15 | 2706-902-0910 | 7.30 ppb |
2015-07-15 | 2706-903-0840 | 7.80 ppb |
2015-07-15 | 2706-904-1125 | 8.00 ppb |
2015-07-15 | 2706-905-1045 | 7.70 ppb |
2015-07-15 | 2706-906-0940 | 9.40 ppb |
2015-07-15 | 2706-907-1245 | 9.20 ppb |
2015-10-21 | 2706-900-0835 | 7.60 ppb |
2015-10-21 | 2706-901-0940 | 7.90 ppb |
2015-10-21 | 2706-902-0900 | 8.00 ppb |
2015-10-21 | 2706-903-0930 | 8.00 ppb |
2015-10-21 | 2706-904-0755 | 8.00 ppb |
2015-10-21 | 2706-905-0915 | 7.80 ppb |
2015-10-21 | 2706-906-1005 | 9.50 ppb |
2015-10-21 | 2706-907-1040 | 9.40 ppb |
2016-01-20 | 2706-900-1015 | 9.20 ppb |
2016-01-20 | 2706-901-0910 | 8.40 ppb |
2016-01-20 | 2706-902-1015 | 2.30 ppb |
2016-01-20 | 2706-903-1105 | 1.30 ppb |
2016-01-20 | 2706-904-1120 | 9.50 ppb |
2016-01-20 | 2706-905-0940 | 9.70 ppb |
2016-01-20 | 2706-906-0940 | 8.40 ppb |
2016-01-20 | 2706-907-0910 | ND |
2016-04-20 | 2706-900-0950 | 6.70 ppb |
2016-04-20 | 2706-901-0905 | 9.60 ppb |
2016-04-20 | 2706-902-1000 | 2.00 ppb |
2016-04-20 | 2706-903-0850 | 1.30 ppb |
2016-04-20 | 2706-904-1100 | 7.90 ppb |
2016-04-20 | 2706-905-1035 | 6.50 ppb |
2016-04-20 | 2706-906-0925 | 8.50 ppb |
2016-04-20 | 2706-907-0950 | 2.20 ppb |
2016-07-20 | 2706-900-0925 | 8.40 ppb |
2016-07-20 | 2706-901-1025 | 8.80 ppb |
2016-07-20 | 2706-902-1000 | 2.30 ppb |
2016-07-20 | 2706-903-0940 | 7.10 ppb |
2016-07-20 | 2706-904-0845 | 8.10 ppb |
2016-07-20 | 2706-905-0945 | 8.60 ppb |
2016-07-20 | 2706-906-1040 | 13.0 ppb |
2016-07-20 | 2706-907-1115 | ND |
2016-10-19 | 2706-900-0950 | 5.70 ppb |
2016-10-19 | 2706-901-0900 | 5.10 ppb |
2016-10-19 | 2706-902-1000 | ND |
2016-10-19 | 2706-903-1030 | 5.70 ppb |
2016-10-19 | 2706-904-1100 | 5.50 ppb |
2016-10-19 | 2706-905-1025 | 6.40 ppb |
2016-10-19 | 2706-906-0930 | 10.00 ppb |
2016-10-19 | 2706-907-0900 | 2.80 ppb |
2017-01-18 | 2706-900-1000 | 8.70 ppb |
2017-01-18 | 2706-901-1030 | 7.40 ppb |
2017-01-18 | 2706-902-0950 | 1.20 ppb |
2017-01-18 | 2706-903-0925 | ND |
2017-01-18 | 2706-904-1240 | 8.00 ppb |
2017-01-18 | 2706-905-0930 | 8.10 ppb |
2017-01-18 | 2706-906-1050 | 1.80 ppb |
2017-01-18 | 2706-907-1120 | 1.20 ppb |
2017-04-19 | 2706-900-1000 | 12.0 ppb |
2017-04-19 | 2706-901-0830 | 14.0 ppb |
2017-04-19 | 2706-902-0840 | 17.0 ppb |
2017-04-19 | 2706-903-0800 | 21.0 ppb |
2017-04-19 | 2706-904-1045 | 14.0 ppb |
2017-04-19 | 2706-905-0920 | 13.0 ppb |
2017-04-19 | 2706-906-0920 | 25.0 ppb |
2017-04-19 | 2706-907-0940 | 14.0 ppb |
2017-07-19 | 2706-900-0920 | 8.90 ppb |
2017-07-19 | 2706-901-0745 | 9.20 ppb |
2017-07-19 | 2706-902-0745 | 5.60 ppb |
2017-07-19 | 2706-903-0930 | 3.20 ppb |
2017-07-19 | 2706-904-0945 | 9.70 ppb |
2017-07-19 | 2706-905-0900 | 7.20 ppb |
2017-07-19 | 2706-906-0815 | 7.00 ppb |
2017-07-19 | 2706-907-0845 | 4.00 ppb |
2017-10-18 | 2706-900-1000 | 14.0 ppb |
2017-10-18 | 2706-901-0920 | 11.0 ppb |
2017-10-18 | 2706-902-0900 | 13.0 ppb |
2017-10-18 | 2706-903-0820 | 8.00 ppb |
2017-10-18 | 2706-904-1100 | 11.0 ppb |
2017-10-18 | 2706-905-0840 | 15.0 ppb |
2017-10-18 | 2706-906-0925 | 16.0 ppb |
2017-10-18 | 2706-907-0750 | 3.10 ppb |
2018-01-17 | 2706-900-1050 | 6.00 ppb |
2018-01-17 | 2706-901-0910 | 4.90 ppb |
2018-01-17 | 2706-902-0855 | 5.30 ppb |
2018-01-17 | 2706-903-0830 | 4.70 ppb |
2018-01-17 | 2706-904-1125 | 5.00 ppb |
2018-01-17 | 2706-905-0945 | 6.60 ppb |
2018-01-17 | 2706-906-0930 | 16.0 ppb |
2018-01-17 | 2706-907-1000 | 3.80 ppb |
2018-04-18 | 2706-900-0945 | 5.30 ppb |
2018-04-18 | 2706-901-0830 | 6.30 ppb |
2018-04-18 | 2706-902-1015 | 5.00 ppb |
2018-04-18 | 2706-903-0945 | 4.40 ppb |
2018-04-18 | 2706-904-1030 | 6.10 ppb |
2018-04-18 | 2706-905-0930 | 5.80 ppb |
2018-04-18 | 2706-906-1055 | 8.60 ppb |
2018-04-18 | 2706-907-1125 | 5.40 ppb |
2018-07-18 | 2706-900-0850 | 9.00 ppb |
2018-07-18 | 2706-901-0850 | 8.40 ppb |
2018-07-18 | 2706-902-0855 | 8.20 ppb |
2018-07-18 | 2706-903-0830 | 7.20 ppb |
2018-07-18 | 2706-904-0755 | 7.30 ppb |
2018-07-18 | 2706-905-0830 | 8.30 ppb |
2018-07-18 | 2706-906-0940 | 10.00 ppb |
2018-07-18 | 2706-907-0730 | 7.40 ppb |
2018-10-17 | 2706-900-1010 | 6.90 ppb |
2018-10-17 | 2706-901-0840 | 7.80 ppb |
2018-10-17 | 2706-902-0830 | 4.60 ppb |
2018-10-17 | 2706-903-0800 | 5.10 ppb |
2018-10-17 | 2706-904-1040 | 7.70 ppb |
2018-10-17 | 2706-905-0930 | 6.30 ppb |
2018-10-17 | 2706-906-0900 | 12.0 ppb |
2018-10-17 | 2706-907-0935 | 7.10 ppb |
2019-01-16 | 2706-900-1105 | 9.80 ppb |
2019-01-16 | 2706-901-0940 | 8.90 ppb |
2019-01-16 | 2706-902-0950 | 8.30 ppb |
2019-01-16 | 2706-903-0900 | 9.10 ppb |
2019-01-16 | 2706-904-1150 | 9.70 ppb |
2019-01-16 | 2706-905-1035 | 9.40 ppb |
2019-01-16 | 2706-906-1040 | 6.90 ppb |
2019-01-16 | 2706-907-1105 | 6.30 ppb |
2019-04-17 | 2706-900-1050 | 10.00 ppb |
2019-04-17 | 2706-901-0840 | 8.30 ppb |
2019-04-17 | 2706-902-0915 | 5.80 ppb |
2019-04-17 | 2706-903-0925 | 7.40 ppb |
2019-04-17 | 2706-904-0845 | 8.00 ppb |
2019-04-17 | 2706-905-1030 | 11.0 ppb |
2019-04-17 | 2706-906-0830 | 22.0 ppb |
2019-04-17 | 2706-907-1310 | 3.70 ppb |
2019-07-17 | 2706-900-1010 | 11.0 ppb |
2019-07-17 | 2706-901-0930 | 9.10 ppb |
2019-07-17 | 2706-902-1005 | 10.00 ppb |
2019-07-17 | 2706-903-1055 | 10.00 ppb |
2019-07-17 | 2706-904-1110 | 10.00 ppb |
2019-07-17 | 2706-905-0815 | 11.0 ppb |
2019-07-17 | 2706-906-0925 | 5.40 ppb |
2019-07-17 | 2706-907-0830 | 3.50 ppb |
2019-10-16 | 2706-900-0805 | 9.10 ppb |
2019-10-16 | 2706-901-0930 | 7.40 ppb |
2019-10-16 | 2706-902-0950 | 4.70 ppb |
2019-10-16 | 2706-903-0920 | 7.80 ppb |
2019-10-16 | 2706-904-0845 | 7.40 ppb |
2019-10-16 | 2706-905-0710 | 5.40 ppb |
2019-10-16 | 2706-906-0825 | 2.40 ppb |
2019-10-16 | 2706-907-0855 | 2.20 ppb |