Bromodichloromethane
City of Tracy
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 | 5.58 ppb | 46 | 37 | ND - 29.0 ppb |
2015 | 4.83 ppb | 34 | 33 | ND - 25.0 ppb |
2016 | 3.64 ppb | 40 | 33 | ND - 17.0 ppb |
2017 | 2.66 ppb | 45 | 37 | ND - 7.60 ppb |
2018 | 3.21 ppb | 41 | 32 | ND - 10.00 ppb |
2019 | 4.97 ppb | 33 | 31 | ND - 15.0 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 |
---|---|---|
2014-01-27 | 9590-900-1049 | 3.60 ppb |
2014-01-27 | 9590-901-0923 | 1.90 ppb |
2014-01-27 | 9590-902-0904 | 1.80 ppb |
2014-01-27 | 9590-903-1349 | 1.90 ppb |
2014-01-27 | 9590-904-1408 | 1.30 ppb |
2014-01-27 | 9590-905-1304 | 1.60 ppb |
2014-01-27 | 9590-906-1334 | 2.20 ppb |
2014-01-27 | 9590-907-0946 | 2.40 ppb |
2014-04-07 | 9590-900-1058 | 5.50 ppb |
2014-04-07 | 9590-901-1002 | 2.20 ppb |
2014-04-07 | 9590-902-0945 | 1.80 ppb |
2014-04-07 | 9590-903-1214 | 2.80 ppb |
2014-04-07 | 9590-904-1253 | 1.50 ppb |
2014-04-07 | 9590-905-1233 | 1.90 ppb |
2014-04-07 | 9590-906-1038 | 2.80 ppb |
2014-04-07 | 9590-907-1018 | 3.00 ppb |
2014-04-28 | 9590-008-1408 | 18.0 ppb |
2014-05-29 | 9590-008-0949 | 29.0 ppb |
2014-06-16 | 9590-003-0802 | ND |
2014-06-16 | 9590-005-0732 | ND |
2014-06-16 | 9590-006-0745 | ND |
2014-06-16 | 9590-008-0831 | 25.0 ppb |
2014-06-17 | 9590-018-0817 | ND |
2014-06-17 | 9590-030-0756 | ND |
2014-06-17 | 9590-034-0733 | ND |
2014-06-19 | 9590-008-1105 | 18.0 ppb |
2014-07-23 | 9590-900-1339 | 10.00 ppb |
2014-07-23 | 9590-901-1121 | 3.40 ppb |
2014-07-23 | 9590-902-1101 | 1.70 ppb |
2014-07-23 | 9590-903-1237 | 9.10 ppb |
2014-07-23 | 9590-904-1306 | ND |
2014-07-23 | 9590-905-1145 | 1.60 ppb |
2014-07-23 | 9590-906-1216 | 10.00 ppb |
2014-07-23 | 9590-907-1430 | 9.90 ppb |
2014-08-06 | 9590-008-1044 | 17.0 ppb |
2014-09-04 | 9590-004-0737 | ND |
2014-10-01 | 9590-032-0746 | ND |
2014-10-28 | 9590-900-1354 | 11.0 ppb |
2014-10-28 | 9590-901-1257 | 2.30 ppb |
2014-10-28 | 9590-902-1238 | 2.40 ppb |
2014-10-28 | 9590-903-1433 | 10.00 ppb |
2014-10-28 | 9590-904-1451 | 1.20 ppb |
2014-10-28 | 9590-905-1509 | 4.40 ppb |
2014-10-28 | 9590-906-1416 | 9.50 ppb |
2014-10-28 | 9590-907-1320 | 12.0 ppb |
2014-10-30 | 9590-008-1325 | 13.0 ppb |
2015-01-21 | 9590-900-1058 | 14.0 ppb |
2015-01-21 | 9590-901-0910 | 3.40 ppb |
2015-01-21 | 9590-902-0850 | 2.20 ppb |
2015-01-21 | 9590-903-1132 | 2.70 ppb |
2015-01-21 | 9590-904-1222 | 1.80 ppb |
2015-01-21 | 9590-905-1151 | 2.70 ppb |
2015-01-21 | 9590-906-0937 | 2.40 ppb |
2015-01-21 | 9590-907-0959 | 2.90 ppb |
2015-04-21 | 9590-900-1325 | 4.70 ppb |
2015-04-21 | 9590-901-0804 | 5.40 ppb |
2015-04-21 | 9590-902-1215 | 2.30 ppb |
2015-04-21 | 9590-903-1024 | 2.40 ppb |
2015-04-21 | 9590-904-1142 | 1.50 ppb |
2015-04-21 | 9590-905-1111 | 2.80 ppb |
2015-04-21 | 9590-906-0912 | 2.50 ppb |
2015-04-21 | 9590-907-0848 | 3.10 ppb |
2015-06-10 | 9590-008-1040 | 25.0 ppb |
2015-07-16 | 9590-900-0856 | 8.70 ppb |
2015-07-16 | 9590-901-0747 | 8.20 ppb |
2015-07-16 | 9590-902-0728 | 2.50 ppb |
2015-07-16 | 9590-903-0941 | 3.00 ppb |
2015-07-16 | 9590-904-1002 | 1.40 ppb |
2015-07-16 | 9590-905-1026 | 2.60 ppb |
2015-07-16 | 9590-906-0923 | 5.70 ppb |
2015-07-16 | 9590-907-0816 | 9.80 ppb |
2015-08-24 | 9590-008-1222 | ND |
2015-10-08 | 9590-900-1027 | 7.90 ppb |
2015-10-08 | 9590-901-0930 | 6.60 ppb |
2015-10-08 | 9590-902-0906 | 2.90 ppb |
2015-10-08 | 9590-903-1243 | 3.30 ppb |
2015-10-08 | 9590-904-1302 | 4.00 ppb |
2015-10-08 | 9590-905-1321 | 5.00 ppb |
2015-10-08 | 9590-906-1050 | 6.70 ppb |
2015-10-08 | 9590-907-0951 | 4.20 ppb |
2016-01-27 | 9590-900-1109 | 4.80 ppb |
2016-01-27 | 9590-901-0830 | 3.60 ppb |
2016-01-27 | 9590-902-0806 | 2.50 ppb |
2016-01-27 | 9590-903-0941 | 3.40 ppb |
2016-01-27 | 9590-904-1027 | 2.20 ppb |
2016-01-27 | 9590-905-1001 | 2.50 ppb |
2016-01-27 | 9590-906-0919 | 2.50 ppb |
2016-01-27 | 9590-907-0853 | 2.50 ppb |
2016-04-20 | 9590-900-1110 | 3.80 ppb |
2016-04-20 | 9590-901-0954 | 5.10 ppb |
2016-04-20 | 9590-902-1307 | 3.30 ppb |
2016-04-20 | 9590-903-1202 | 3.50 ppb |
2016-04-20 | 9590-904-1240 | 2.90 ppb |
2016-04-20 | 9590-905-1221 | 3.40 ppb |
2016-04-20 | 9590-906-1041 | 3.00 ppb |
2016-04-20 | 9590-907-1020 | 2.20 ppb |
2016-06-29 | 9590-018-0750 | ND |
2016-06-29 | 9590-032-0820 | ND |
2016-07-11 | 9590-900-0920 | 12.0 ppb |
2016-07-11 | 9590-901-0818 | 12.0 ppb |
2016-07-11 | 9590-902-1140 | 2.60 ppb |
2016-07-11 | 9590-903-1034 | 2.50 ppb |
2016-07-11 | 9590-904-1112 | 2.20 ppb |
2016-07-11 | 9590-905-1050 | 2.50 ppb |
2016-07-11 | 9590-906-1012 | 6.60 ppb |
2016-07-11 | 9590-907-0947 | 7.60 ppb |
2016-07-20 | 9590-008-1000 | 17.0 ppb |
2016-08-04 | 9590-003-0706 | ND |
2016-08-04 | 9590-004-0651 | ND |
2016-08-04 | 9590-006-0725 | ND |
2016-09-14 | 9590-034-0812 | ND |
2016-09-22 | 9590-005-0825 | ND |
2016-10-05 | 9590-900-1024 | 3.90 ppb |
2016-10-05 | 9590-901-0830 | 7.60 ppb |
2016-10-05 | 9590-902-0750 | 2.60 ppb |
2016-10-05 | 9590-903-1049 | 2.60 ppb |
2016-10-05 | 9590-904-1107 | 2.60 ppb |
2016-10-05 | 9590-905-1125 | 2.60 ppb |
2016-10-05 | 9590-906-0900 | 4.00 ppb |
2016-10-05 | 9590-907-0948 | 3.40 ppb |
2017-01-05 | 9590-900-0845 | 5.50 ppb |
2017-01-05 | 9590-901-0939 | 3.20 ppb |
2017-01-05 | 9590-902-0922 | 2.80 ppb |
2017-01-05 | 9590-903-1039 | 3.30 ppb |
2017-01-05 | 9590-904-1112 | 2.70 ppb |
2017-01-05 | 9590-905-1053 | 2.70 ppb |
2017-01-05 | 9590-906-1024 | 2.70 ppb |
2017-01-05 | 9590-907-1000 | 3.00 ppb |
2017-03-08 | 9590-030-1230 | ND |
2017-04-04 | 9590-900-0935 | 7.60 ppb |
2017-04-04 | 9590-901-0853 | 5.10 ppb |
2017-04-04 | 9590-902-1256 | 4.20 ppb |
2017-04-04 | 9590-903-1145 | 5.40 ppb |
2017-04-04 | 9590-904-1205 | 4.20 ppb |
2017-04-04 | 9590-905-1232 | 4.10 ppb |
2017-04-04 | 9590-906-1128 | 3.90 ppb |
2017-04-04 | 9590-907-1111 | 3.20 ppb |
2017-06-28 | 9590-008-1158 | ND |
2017-06-28 | 9590-018-0714 | ND |
2017-06-28 | 9590-032-0814 | ND |
2017-06-28 | 9590-034-0742 | ND |
2017-07-10 | 9590-900-0952 | 3.30 ppb |
2017-07-10 | 9590-901-0914 | 3.10 ppb |
2017-07-10 | 9590-902-0850 | 1.70 ppb |
2017-07-10 | 9590-903-1109 | 2.10 ppb |
2017-07-10 | 9590-904-1128 | 1.80 ppb |
2017-07-10 | 9590-905-1224 | 1.80 ppb |
2017-07-10 | 9590-906-1052 | 3.20 ppb |
2017-07-10 | 9590-907-1032 | 2.80 ppb |
2017-08-16 | 9590-900-1122 | 2.50 ppb |
2017-08-16 | 9590-901-1242 | 2.40 ppb |
2017-08-16 | 9590-906-1211 | 2.20 ppb |
2017-08-16 | 9590-907-1151 | 1.90 ppb |
2017-09-14 | 9590-003-0749 | ND |
2017-09-14 | 9590-004-0738 | ND |
2017-09-14 | 9590-005-0814 | ND |
2017-09-14 | 9590-006-0824 | 1.50 ppb |
2017-10-09 | 9590-900-1117 | 5.50 ppb |
2017-10-09 | 9590-901-1159 | 2.30 ppb |
2017-10-09 | 9590-902-0811 | 2.00 ppb |
2017-10-09 | 9590-903-0939 | 3.40 ppb |
2017-10-09 | 9590-904-0858 | 2.20 ppb |
2017-10-09 | 9590-905-0839 | 2.00 ppb |
2017-10-09 | 9590-906-1002 | 3.80 ppb |
2017-10-09 | 9590-907-1018 | 4.60 ppb |
2018-01-22 | 9590-901-0933 | 3.80 ppb |
2018-01-22 | 9590-902-0910 | 2.20 ppb |
2018-01-22 | 9590-903-1216 | 2.60 ppb |
2018-01-22 | 9590-904-1142 | 2.30 ppb |
2018-01-22 | 9590-905-1232 | 2.40 ppb |
2018-01-22 | 9590-906-1022 | 2.50 ppb |
2018-01-22 | 9590-907-1000 | 2.30 ppb |
2018-01-30 | 9590-900-1055 | 5.80 ppb |
2018-04-02 | 9590-900-0958 | 8.80 ppb |
2018-04-02 | 9590-901-0842 | 2.90 ppb |
2018-04-02 | 9590-902-0818 | 1.80 ppb |
2018-04-02 | 9590-903-1033 | 3.10 ppb |
2018-04-02 | 9590-904-1114 | 2.20 ppb |
2018-04-02 | 9590-905-1150 | 2.00 ppb |
2018-04-02 | 9590-906-0923 | 2.40 ppb |
2018-04-02 | 9590-907-0903 | 4.40 ppb |
2018-06-06 | 9590-018-0657 | ND |
2018-06-06 | 9590-032-0750 | ND |
2018-06-07 | 9590-003-0753 | ND |
2018-06-07 | 9590-004-0741 | ND |
2018-06-13 | 9590-034-0856 | ND |
2018-06-21 | 9590-034-0747 | ND |
2018-07-09 | 9590-900-0832 | 10.00 ppb |
2018-07-09 | 9590-901-1018 | 9.00 ppb |
2018-07-09 | 9590-902-0951 | 2.00 ppb |
2018-07-09 | 9590-903-1004 | 6.70 ppb |
2018-07-09 | 9590-904-1048 | 2.70 ppb |
2018-07-09 | 9590-905-1124 | 4.10 ppb |
2018-07-09 | 9590-906-0916 | 8.50 ppb |
2018-07-09 | 9590-907-0856 | 9.50 ppb |
2018-07-11 | 9590-005-0825 | ND |
2018-07-11 | 9590-006-0758 | ND |
2018-07-11 | 9590-008-0832 | ND |
2018-10-10 | 9590-900-1020 | 5.10 ppb |
2018-10-10 | 9590-901-0832 | 4.30 ppb |
2018-10-10 | 9590-902-0817 | 1.80 ppb |
2018-10-10 | 9590-903-1144 | 4.70 ppb |
2018-10-10 | 9590-904-1125 | 1.50 ppb |
2018-10-10 | 9590-905-1158 | 2.20 ppb |
2018-10-10 | 9590-906-0952 | 5.20 ppb |
2018-10-10 | 9590-907-0920 | 3.00 ppb |
2019-01-10 | 9590-900-1027 | 12.0 ppb |
2019-01-10 | 9590-901-0856 | 8.00 ppb |
2019-01-10 | 9590-902-0837 | 1.50 ppb |
2019-01-10 | 9590-903-1209 | 8.30 ppb |
2019-01-10 | 9590-904-1130 | 2.00 ppb |
2019-01-10 | 9590-905-1222 | 3.30 ppb |
2019-01-10 | 9590-906-0957 | 8.50 ppb |
2019-01-10 | 9590-907-0929 | 5.50 ppb |
2019-04-01 | 9590-900-1019 | 8.40 ppb |
2019-04-01 | 9590-901-0857 | ND |
2019-04-01 | 9590-902-0839 | 2.10 ppb |
2019-04-01 | 9590-903-0840 | 2.30 ppb |
2019-04-01 | 9590-904-1046 | 1.90 ppb |
2019-04-01 | 9590-905-0856 | 2.40 ppb |
2019-04-01 | 9590-906-0946 | 3.80 ppb |
2019-04-01 | 9590-907-0926 | 2.30 ppb |
2019-06-04 | 9590-008-1025 | ND |
2019-07-08 | 9590-900-0940 | 15.0 ppb |
2019-07-08 | 9590-901-0801 | 9.10 ppb |
2019-07-08 | 9590-902-0742 | 1.40 ppb |
2019-07-08 | 9590-903-1028 | 8.40 ppb |
2019-07-08 | 9590-904-1010 | 1.60 ppb |
2019-07-08 | 9590-905-1044 | 5.10 ppb |
2019-07-08 | 9590-906-0846 | 8.70 ppb |
2019-07-08 | 9590-907-0825 | 4.90 ppb |
2019-10-10 | 9590-901-1202 | 5.80 ppb |
2019-10-10 | 9590-902-1136 | 1.80 ppb |
2019-10-10 | 9590-907-1232 | 3.00 ppb |
2019-10-14 | 9590-900-0835 | 13.0 ppb |
2019-10-14 | 9590-903-0943 | 3.90 ppb |
2019-10-14 | 9590-904-0911 | 1.40 ppb |
2019-10-14 | 9590-905-1008 | 2.50 ppb |
2019-10-14 | 9590-906-1258 | 6.20 ppb |