Bromodichloromethane
California Water Service - Bear Gulch
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.
239
Samples
0
Samples exceeding legal limit (MCL)
224
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | 1.11 ppb | 36 | 36 | 0.800 ppb - 1.50 ppb |
| 2015 | 3.68 ppb | 39 | 39 | 0.760 ppb - 19.9 ppb |
| 2016 | 5.76 ppb | 41 | 41 | 0.840 ppb - 18.0 ppb |
| 2017 | 5.72 ppb | 41 | 33 | ND - 17.0 ppb |
| 2018 | 2.12 ppb | 39 | 39 | 0.610 ppb - 16.0 ppb |
| 2019 | 3.55 ppb | 43 | 36 | ND - 19.0 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 |
|---|---|---|
| 2014-03-10 | 5701-908-1210 | 0.980 ppb |
| 2014-03-10 | 5701-909-1212 | 0.960 ppb |
| 2014-03-12 | 5701-900-1002 | 1.04 ppb |
| 2014-03-12 | 5701-901-0945 | 0.980 ppb |
| 2014-03-12 | 5701-902-1023 | 0.930 ppb |
| 2014-03-12 | 5701-903-1050 | 0.940 ppb |
| 2014-03-12 | 5701-904-1051 | 0.990 ppb |
| 2014-03-12 | 5701-905-0938 | 0.920 ppb |
| 2014-03-12 | 5701-906-0915 | 0.980 ppb |
| 2014-06-11 | 5701-900-1118 | 0.960 ppb |
| 2014-06-11 | 5701-901-1158 | 0.800 ppb |
| 2014-06-11 | 5701-902-1031 | 0.980 ppb |
| 2014-06-11 | 5701-903-1220 | 1.02 ppb |
| 2014-06-11 | 5701-904-0944 | 0.870 ppb |
| 2014-06-11 | 5701-905-1009 | 0.940 ppb |
| 2014-06-11 | 5701-906-1140 | 0.880 ppb |
| 2014-06-11 | 5701-908-1135 | 1.01 ppb |
| 2014-06-11 | 5701-909-1106 | 0.960 ppb |
| 2014-09-08 | 5701-900-1247 | 1.29 ppb |
| 2014-09-08 | 5701-901-1047 | 1.18 ppb |
| 2014-09-08 | 5701-902-1517 | 1.37 ppb |
| 2014-09-08 | 5701-903-1014 | 1.34 ppb |
| 2014-09-08 | 5701-908-1144 | 1.26 ppb |
| 2014-09-08 | 5701-909-1242 | 1.15 ppb |
| 2014-09-10 | 5701-904-1203 | 1.43 ppb |
| 2014-09-10 | 5701-905-1025 | 1.50 ppb |
| 2014-09-10 | 5701-906-1010 | 1.36 ppb |
| 2014-12-08 | 5701-908-1035 | 1.24 ppb |
| 2014-12-08 | 5701-909-1015 | 1.19 ppb |
| 2014-12-09 | 5701-900-1038 | 1.16 ppb |
| 2014-12-09 | 5701-901-0950 | 1.10 ppb |
| 2014-12-09 | 5701-902-1135 | 1.23 ppb |
| 2014-12-09 | 5701-903-0936 | 1.33 ppb |
| 2014-12-09 | 5701-904-1140 | 1.22 ppb |
| 2014-12-09 | 5701-905-1206 | 1.24 ppb |
| 2014-12-09 | 5701-906-1000 | 1.22 ppb |
| 2015-03-10 | 5701-900-0932 | 6.39 ppb |
| 2015-03-10 | 5701-901-0932 | 6.71 ppb |
| 2015-03-10 | 5701-902-0932 | 7.84 ppb |
| 2015-03-10 | 5701-903-0932 | 7.31 ppb |
| 2015-03-10 | 5701-904-0930 | 7.13 ppb |
| 2015-03-10 | 5701-905-0930 | 6.16 ppb |
| 2015-03-10 | 5701-906-0930 | 7.25 ppb |
| 2015-03-10 | 5701-907-0930 | 19.0 ppb |
| 2015-03-10 | 5701-908-0934 | 1.38 ppb |
| 2015-03-10 | 5701-909-0935 | 1.95 ppb |
| 2015-03-19 | 5701-907-0300 | 19.3 ppb |
| 2015-03-26 | 5701-907-1538 | 19.9 ppb |
| 2015-06-10 | 5701-900-0849 | 1.96 ppb |
| 2015-06-10 | 5701-901-0849 | 2.07 ppb |
| 2015-06-10 | 5701-902-0849 | 1.30 ppb |
| 2015-06-10 | 5701-903-0849 | 1.31 ppb |
| 2015-06-10 | 5701-904-0849 | 1.28 ppb |
| 2015-06-10 | 5701-905-0849 | 1.48 ppb |
| 2015-06-10 | 5701-906-0849 | 1.48 ppb |
| 2015-06-10 | 5701-908-0845 | 1.37 ppb |
| 2015-06-10 | 5701-909-0846 | 1.33 ppb |
| 2015-09-16 | 5701-900-0814 | 0.980 ppb |
| 2015-09-16 | 5701-901-0814 | 0.820 ppb |
| 2015-09-16 | 5701-902-0814 | 1.10 ppb |
| 2015-09-16 | 5701-903-0814 | 0.940 ppb |
| 2015-09-16 | 5701-904-0814 | 0.810 ppb |
| 2015-09-16 | 5701-905-0814 | 0.890 ppb |
| 2015-09-16 | 5701-906-0814 | 0.970 ppb |
| 2015-09-16 | 5701-908-0814 | 0.760 ppb |
| 2015-09-16 | 5701-909-0814 | 1.01 ppb |
| 2015-12-14 | 5701-900-0824 | 1.21 ppb |
| 2015-12-14 | 5701-901-0824 | 1.18 ppb |
| 2015-12-14 | 5701-902-0824 | 1.08 ppb |
| 2015-12-14 | 5701-903-0824 | 1.30 ppb |
| 2015-12-14 | 5701-904-0824 | 1.23 ppb |
| 2015-12-14 | 5701-905-0824 | 1.50 ppb |
| 2015-12-14 | 5701-906-0824 | 1.21 ppb |
| 2015-12-14 | 5701-908-0824 | 1.28 ppb |
| 2015-12-14 | 5701-909-0824 | 1.38 ppb |
| 2016-02-16 | 5701-002-1040 | 18.0 ppb |
| 2016-02-16 | 5701-907-1125 | 17.0 ppb |
| 2016-03-16 | 5701-900-0836 | 9.57 ppb |
| 2016-03-16 | 5701-901-0836 | 11.7 ppb |
| 2016-03-16 | 5701-902-0836 | 9.87 ppb |
| 2016-03-16 | 5701-903-0836 | 8.87 ppb |
| 2016-03-16 | 5701-904-0836 | 7.09 ppb |
| 2016-03-16 | 5701-905-0836 | 9.22 ppb |
| 2016-03-16 | 5701-906-0836 | 9.81 ppb |
| 2016-03-16 | 5701-907-0836 | 11.7 ppb |
| 2016-03-16 | 5701-908-0835 | 3.12 ppb |
| 2016-03-16 | 5701-909-0835 | 2.95 ppb |
| 2016-04-12 | 5810-907-1413 | 18.0 ppb |
| 2016-06-14 | 5701-908-0817 | 1.21 ppb |
| 2016-06-14 | 5701-909-0817 | 0.870 ppb |
| 2016-06-16 | 5701-900-1459 | 4.83 ppb |
| 2016-06-16 | 5701-901-1238 | 5.79 ppb |
| 2016-06-16 | 5701-902-1526 | 5.45 ppb |
| 2016-06-16 | 5701-903-1107 | 6.13 ppb |
| 2016-06-16 | 5701-904-1603 | 2.96 ppb |
| 2016-06-16 | 5701-905-1623 | 3.55 ppb |
| 2016-06-16 | 5701-906-1257 | 6.44 ppb |
| 2016-06-16 | 5701-907-1414 | 17.8 ppb |
| 2016-09-14 | 5701-900-0816 | 1.32 ppb |
| 2016-09-14 | 5701-901-0816 | 1.67 ppb |
| 2016-09-14 | 5701-902-0816 | 1.97 ppb |
| 2016-09-14 | 5701-903-0816 | 1.71 ppb |
| 2016-09-14 | 5701-904-0816 | 1.54 ppb |
| 2016-09-14 | 5701-905-0816 | 1.31 ppb |
| 2016-09-14 | 5701-906-0816 | 1.59 ppb |
| 2016-09-14 | 5701-908-0816 | 0.970 ppb |
| 2016-09-14 | 5701-909-0816 | 0.840 ppb |
| 2016-12-14 | 5810-900-1345 | 2.90 ppb |
| 2016-12-14 | 5810-901-1218 | 2.50 ppb |
| 2016-12-14 | 5810-902-1402 | 3.30 ppb |
| 2016-12-14 | 5810-903-1313 | 3.30 ppb |
| 2016-12-14 | 5810-904-1259 | 3.00 ppb |
| 2016-12-14 | 5810-905-1151 | 6.70 ppb |
| 2016-12-14 | 5810-906-1207 | 3.20 ppb |
| 2016-12-14 | 5810-908-1109 | 2.40 ppb |
| 2016-12-14 | 5810-909-1153 | 4.20 ppb |
| 2017-02-15 | 5701-002-1248 | 12.9 ppb |
| 2017-02-15 | 5701-907-1301 | 12.5 ppb |
| 2017-03-13 | 5701-900-0819 | 9.11 ppb |
| 2017-03-13 | 5701-901-0819 | 9.10 ppb |
| 2017-03-13 | 5701-902-0819 | 8.55 ppb |
| 2017-03-13 | 5701-903-0819 | 10.3 ppb |
| 2017-03-13 | 5701-904-0819 | 7.55 ppb |
| 2017-03-13 | 5701-905-0819 | 9.13 ppb |
| 2017-03-13 | 5701-906-0819 | 9.24 ppb |
| 2017-03-13 | 5701-907-0819 | 11.5 ppb |
| 2017-03-13 | 5701-908-0819 | 3.99 ppb |
| 2017-03-13 | 5701-909-0819 | 3.30 ppb |
| 2017-06-16 | 5701-900-0807 | 2.82 ppb |
| 2017-06-16 | 5701-901-0807 | 4.41 ppb |
| 2017-06-16 | 5701-902-0807 | 6.88 ppb |
| 2017-06-16 | 5701-903-0807 | 5.79 ppb |
| 2017-06-16 | 5701-904-0807 | 7.13 ppb |
| 2017-06-16 | 5701-905-0807 | 7.51 ppb |
| 2017-06-16 | 5701-906-0807 | 5.70 ppb |
| 2017-06-16 | 5701-907-0807 | 17.0 ppb |
| 2017-06-16 | 5701-908-0807 | 1.20 ppb |
| 2017-06-16 | 5701-909-0807 | 2.13 ppb |
| 2017-09-11 | 5810-900-1330 | ND |
| 2017-09-11 | 5810-901-1037 | ND |
| 2017-09-11 | 5810-902-1215 | ND |
| 2017-09-11 | 5810-903-0951 | ND |
| 2017-09-11 | 5810-904-1434 | ND |
| 2017-09-11 | 5810-905-1518 | ND |
| 2017-09-11 | 5810-906-1050 | ND |
| 2017-09-11 | 5810-908-1202 | 1.10 ppb |
| 2017-09-11 | 5810-909-1301 | ND |
| 2017-12-12 | 5810-900-1324 | 4.80 ppb |
| 2017-12-12 | 5810-901-1112 | 7.30 ppb |
| 2017-12-12 | 5810-902-1302 | 6.00 ppb |
| 2017-12-12 | 5810-903-1051 | 6.90 ppb |
| 2017-12-12 | 5810-904-1242 | 6.90 ppb |
| 2017-12-12 | 5810-905-1217 | 9.60 ppb |
| 2017-12-12 | 5810-906-1125 | 7.50 ppb |
| 2017-12-12 | 5810-907-1332 | 14.0 ppb |
| 2017-12-12 | 5701-908-0849 | 1.68 ppb |
| 2017-12-12 | 5701-909-0849 | 1.13 ppb |
| 2018-02-05 | 5701-002-1210 | 16.0 ppb |
| 2018-02-05 | 5701-907-1215 | 16.0 ppb |
| 2018-02-22 | 5810-907-0930 | 15.0 ppb |
| 2018-03-14 | 5701-900-0839 | 1.50 ppb |
| 2018-03-14 | 5701-901-0839 | 2.24 ppb |
| 2018-03-14 | 5701-902-0839 | 0.820 ppb |
| 2018-03-14 | 5701-903-0839 | 0.960 ppb |
| 2018-03-14 | 5701-904-0839 | 0.770 ppb |
| 2018-03-14 | 5701-905-0839 | 0.990 ppb |
| 2018-03-14 | 5701-906-0839 | 0.730 ppb |
| 2018-03-14 | 5701-908-1327 | 0.800 ppb |
| 2018-03-14 | 5701-909-1255 | 0.940 ppb |
| 2018-06-11 | 5701-900-0857 | 1.07 ppb |
| 2018-06-11 | 5701-901-0857 | 1.04 ppb |
| 2018-06-11 | 5701-902-0857 | 1.14 ppb |
| 2018-06-11 | 5701-903-0857 | 1.15 ppb |
| 2018-06-11 | 5701-904-0857 | 1.05 ppb |
| 2018-06-11 | 5701-905-0857 | 1.000 ppb |
| 2018-06-11 | 5701-906-0857 | 1.03 ppb |
| 2018-06-11 | 5701-908-0857 | 0.720 ppb |
| 2018-06-11 | 5701-909-0857 | 0.610 ppb |
| 2018-09-13 | 5701-900-0653 | 0.950 ppb |
| 2018-09-13 | 5701-901-0654 | 0.940 ppb |
| 2018-09-13 | 5701-902-0653 | 1.25 ppb |
| 2018-09-13 | 5701-903-0653 | 1.22 ppb |
| 2018-09-13 | 5701-904-0650 | 1.18 ppb |
| 2018-09-13 | 5701-905-0650 | 0.880 ppb |
| 2018-09-13 | 5701-906-0650 | 0.930 ppb |
| 2018-09-17 | 5701-908-0859 | 1.23 ppb |
| 2018-09-17 | 5701-909-0900 | 1.24 ppb |
| 2018-12-10 | 5701-900-0924 | 0.800 ppb |
| 2018-12-10 | 5701-901-0924 | 0.750 ppb |
| 2018-12-10 | 5701-902-0924 | 0.880 ppb |
| 2018-12-10 | 5701-903-0924 | 0.820 ppb |
| 2018-12-10 | 5701-904-0924 | 0.820 ppb |
| 2018-12-10 | 5701-905-0924 | 0.800 ppb |
| 2018-12-10 | 5701-906-0924 | 0.770 ppb |
| 2018-12-10 | 5701-908-0924 | 0.870 ppb |
| 2018-12-10 | 5701-909-0924 | 0.740 ppb |
| 2019-02-20 | 5701-002-1328 | 16.5 ppb |
| 2019-02-20 | 5701-907-1331 | 17.1 ppb |
| 2019-03-13 | 5701-900-0832 | 9.48 ppb |
| 2019-03-13 | 5701-901-0832 | 5.70 ppb |
| 2019-03-13 | 5701-902-0832 | 7.07 ppb |
| 2019-03-13 | 5701-903-0832 | 4.97 ppb |
| 2019-03-13 | 5701-904-0832 | 7.05 ppb |
| 2019-03-13 | 5701-905-0832 | 5.56 ppb |
| 2019-03-13 | 5701-906-0832 | 4.99 ppb |
| 2019-03-13 | 5701-908-0832 | 4.33 ppb |
| 2019-03-13 | 5701-909-0832 | 4.26 ppb |
| 2019-03-18 | 5701-907-1051 | 19.0 ppb |
| 2019-03-27 | 9590-907-1445 | 18.0 ppb |
| 2019-06-10 | 5701-900-1037 | 1.53 ppb |
| 2019-06-10 | 5701-901-1037 | 4.29 ppb |
| 2019-06-10 | 5701-902-1037 | 1.65 ppb |
| 2019-06-10 | 5701-903-1037 | 1.46 ppb |
| 2019-06-10 | 5701-904-1037 | 2.43 ppb |
| 2019-06-10 | 5701-905-1037 | 1.42 ppb |
| 2019-06-10 | 5701-906-1037 | 1.32 ppb |
| 2019-06-10 | 5701-908-1059 | 1.34 ppb |
| 2019-06-10 | 5701-909-1037 | 1.17 ppb |
| 2019-06-18 | 5810-910-1201 | ND |
| 2019-09-09 | 5701-900-1234 | 0.680 ppb |
| 2019-09-09 | 5701-901-1059 | 0.590 ppb |
| 2019-09-09 | 5701-902-1300 | 0.730 ppb |
| 2019-09-09 | 5701-903-1024 | 0.670 ppb |
| 2019-09-09 | 5701-904-1410 | 0.690 ppb |
| 2019-09-09 | 5701-905-1320 | 0.630 ppb |
| 2019-09-09 | 5701-906-1122 | 0.640 ppb |
| 2019-09-09 | 5701-910-1004 | 0.750 ppb |
| 2019-09-10 | 5701-908-1148 | 0.680 ppb |
| 2019-09-10 | 5701-909-1116 | 0.680 ppb |
| 2019-12-09 | 5701-900-1153 | ND |
| 2019-12-09 | 5701-901-1110 | 1.25 ppb |
| 2019-12-09 | 5701-902-1219 | ND |
| 2019-12-09 | 5701-903-1318 | 1.01 ppb |
| 2019-12-09 | 5701-904-1230 | ND |
| 2019-12-09 | 5701-905-1243 | ND |
| 2019-12-09 | 5701-906-1102 | ND |
| 2019-12-09 | 5701-908-1032 | 1.52 ppb |
| 2019-12-09 | 5701-909-1048 | ND |
| 2019-12-09 | 5701-910-0936 | 1.69 ppb |