Bromoform
California Water Service Co-leona Valley
Bromoform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromoform 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 | 11.9 ppb | 30 | 22 | ND - 24.6 ppb |
2015 | 19.2 ppb | 41 | 37 | ND - 34.5 ppb |
2016 | 18.4 ppb | 40 | 38 | ND - 49.2 ppb |
2017 | 5.41 ppb | 40 | 36 | ND - 19.0 ppb |
2018 | 15.5 ppb | 46 | 44 | ND - 41.1 ppb |
2019 | 11.5 ppb | 43 | 39 | ND - 34.0 ppb |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 0.5 ppb
The EWG Health Guideline of 0.5 ppb for bromoform 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 |
---|---|---|
2014-01-07 | 5701-005-1027 | 17.7 ppb |
2014-01-21 | 5701-008-1129 | 10.5 ppb |
2014-02-11 | 5701-005-1017 | 18.1 ppb |
2014-02-18 | 5701-001-1113 | ND |
2014-02-18 | 5701-006-1123 | ND |
2014-03-04 | 5701-005-1454 | 13.9 ppb |
2014-04-08 | 5701-005-1259 | 8.12 ppb |
2014-05-13 | 5701-005-1152 | 6.07 ppb |
2014-05-27 | 5701-001-1212 | ND |
2014-05-27 | 5701-006-1215 | ND |
2014-06-10 | 5701-005-1100 | 9.94 ppb |
2014-07-29 | 5701-005-1230 | 18.8 ppb |
2014-08-12 | 5701-005-1002 | 18.4 ppb |
2014-08-25 | 5701-001-1040 | ND |
2014-08-25 | 5701-006-1055 | ND |
2014-08-25 | 5701-008-1025 | 22.6 ppb |
2014-09-09 | 5701-005-1540 | 17.9 ppb |
2014-09-09 | 5701-800-1457 | 23.0 ppb |
2014-09-09 | 5701-801-1450 | 23.9 ppb |
2014-10-14 | 5701-005-1445 | 14.2 ppb |
2014-10-14 | 5701-800-1402 | 16.3 ppb |
2014-10-14 | 5701-801-1353 | 20.0 ppb |
2014-11-18 | 5701-001-1124 | ND |
2014-11-18 | 5701-006-1130 | ND |
2014-11-25 | 5701-005-1555 | 9.84 ppb |
2014-11-25 | 5701-800-1338 | 24.6 ppb |
2014-11-25 | 5701-801-1326 | 20.4 ppb |
2014-12-16 | 5701-005-1250 | 14.1 ppb |
2014-12-16 | 5701-800-1219 | 14.9 ppb |
2014-12-16 | 5701-801-1227 | 13.4 ppb |
2015-01-13 | 5701-005-1132 | 23.7 ppb |
2015-01-13 | 5701-800-1106 | 15.5 ppb |
2015-01-13 | 5701-801-1058 | 13.8 ppb |
2015-01-20 | 5701-008-1108 | 14.6 ppb |
2015-02-10 | 5701-005-0830 | 10.4 ppb |
2015-02-10 | 5701-800-0829 | 22.2 ppb |
2015-02-10 | 5701-801-0829 | 14.2 ppb |
2015-02-17 | 5701-001-1116 | ND |
2015-02-17 | 5701-006-1128 | ND |
2015-03-10 | 5701-005-0925 | 7.65 ppb |
2015-03-10 | 5701-800-0927 | 11.6 ppb |
2015-03-10 | 5701-801-0928 | 10.5 ppb |
2015-04-07 | 5701-005-0849 | 28.3 ppb |
2015-04-07 | 5701-800-0848 | 23.3 ppb |
2015-04-07 | 5701-801-0848 | 25.2 ppb |
2015-05-13 | 5701-005-0933 | 17.3 ppb |
2015-05-13 | 5701-800-0909 | 17.5 ppb |
2015-05-13 | 5701-801-0931 | 18.2 ppb |
2015-05-19 | 5701-001-1028 | ND |
2015-05-19 | 5701-006-1021 | ND |
2015-06-09 | 5701-005-1022 | 23.7 ppb |
2015-06-09 | 5701-800-0953 | 23.2 ppb |
2015-06-09 | 5701-801-1008 | 23.3 ppb |
2015-07-14 | 5701-005-0850 | 25.1 ppb |
2015-07-14 | 5701-800-0849 | 29.4 ppb |
2015-07-14 | 5701-801-0850 | 26.5 ppb |
2015-08-18 | 5701-005-0836 | 26.0 ppb |
2015-08-18 | 5701-008-1055 | 24.7 ppb |
2015-08-18 | 5701-800-0834 | 32.5 ppb |
2015-08-18 | 5701-801-0837 | 30.2 ppb |
2015-09-15 | 5701-005-0843 | 28.6 ppb |
2015-09-15 | 5701-800-0841 | 34.5 ppb |
2015-09-15 | 5701-801-0842 | 29.0 ppb |
2015-10-13 | 5701-005-1016 | 25.2 ppb |
2015-10-13 | 5701-800-1014 | 25.6 ppb |
2015-10-13 | 5701-801-1015 | 25.1 ppb |
2015-11-09 | 5810-800-1338 | 21.0 ppb |
2015-11-09 | 5810-801-1328 | 17.0 ppb |
2015-12-15 | 5701-005-0800 | 19.0 ppb |
2015-12-15 | 5701-800-0759 | 11.6 ppb |
2015-12-15 | 5701-801-0759 | 11.4 ppb |
2016-01-06 | 5701-005-0910 | 18.8 ppb |
2016-01-06 | 5701-800-0911 | 9.03 ppb |
2016-01-06 | 5701-801-0911 | 14.1 ppb |
2016-01-19 | 5701-008-1500 | 10.5 ppb |
2016-02-09 | 5701-005-0905 | 22.5 ppb |
2016-02-09 | 5701-800-0905 | 15.6 ppb |
2016-02-09 | 5701-801-0905 | 14.6 ppb |
2016-03-08 | 5701-005-0911 | 13.3 ppb |
2016-03-08 | 5701-800-0910 | 12.1 ppb |
2016-03-08 | 5701-801-0911 | 11.5 ppb |
2016-04-12 | 5701-005-0858 | 6.48 ppb |
2016-04-12 | 5701-800-0857 | 15.6 ppb |
2016-04-12 | 5701-801-0857 | 15.7 ppb |
2016-05-10 | 5701-005-0916 | 16.1 ppb |
2016-05-10 | 5810-800-1106 | 17.0 ppb |
2016-05-10 | 5810-801-1056 | 19.0 ppb |
2016-05-24 | 5701-001-1244 | ND |
2016-05-24 | 5701-006-1238 | ND |
2016-06-14 | 5701-005-0819 | 15.8 ppb |
2016-06-14 | 5701-800-0818 | 24.1 ppb |
2016-06-14 | 5701-801-0819 | 28.1 ppb |
2016-07-12 | 5701-005-0827 | 13.0 ppb |
2016-07-12 | 5701-800-0825 | 27.8 ppb |
2016-07-12 | 5701-801-0826 | 29.7 ppb |
2016-08-03 | 9590-008-1045 | 15.0 ppb |
2016-08-09 | 5701-005-0937 | 11.6 ppb |
2016-08-09 | 5701-800-0938 | 20.3 ppb |
2016-08-09 | 5701-801-0939 | 14.3 ppb |
2016-09-13 | 5701-005-0837 | 9.84 ppb |
2016-09-13 | 5701-800-0835 | 11.0 ppb |
2016-09-13 | 5701-801-0836 | 5.58 ppb |
2016-10-18 | 5701-005-0936 | 37.9 ppb |
2016-10-18 | 5701-800-0935 | 28.1 ppb |
2016-10-18 | 5701-801-0936 | 25.4 ppb |
2016-11-15 | 5701-005-0848 | 49.2 ppb |
2016-11-15 | 5701-800-0848 | 33.6 ppb |
2016-11-15 | 5701-801-0849 | 36.3 ppb |
2016-12-13 | 5810-005-1113 | 27.0 ppb |
2016-12-13 | 5810-800-1200 | 22.0 ppb |
2016-12-13 | 5810-801-1140 | 18.0 ppb |
2017-01-17 | 5810-005-1258 | 19.0 ppb |
2017-01-17 | 5810-800-1352 | 18.0 ppb |
2017-01-17 | 5810-801-1337 | 18.0 ppb |
2017-01-24 | 5701-008-1506 | 19.0 ppb |
2017-02-14 | 5701-005-0945 | 1.94 ppb |
2017-02-14 | 5701-800-0942 | 9.44 ppb |
2017-02-14 | 5701-801-0943 | 9.88 ppb |
2017-03-14 | 5810-005-1005 | ND |
2017-03-14 | 5701-800-0827 | 2.20 ppb |
2017-03-14 | 5701-801-0828 | 2.97 ppb |
2017-04-03 | 5701-005-0817 | 1.11 ppb |
2017-04-03 | 5701-800-0817 | 11.4 ppb |
2017-04-03 | 5701-801-0818 | 4.45 ppb |
2017-05-02 | 5701-001-1245 | ND |
2017-05-02 | 5701-006-1241 | ND |
2017-05-09 | 5701-005-0955 | 0.950 ppb |
2017-05-09 | 5701-800-0953 | 6.05 ppb |
2017-05-09 | 5701-801-0954 | 2.82 ppb |
2017-06-13 | 5810-005-1246 | 4.70 ppb |
2017-06-13 | 5810-800-1157 | 5.40 ppb |
2017-06-13 | 5810-801-1210 | 5.00 ppb |
2017-07-11 | 5810-005-1024 | ND |
2017-07-11 | 5810-800-1143 | 2.10 ppb |
2017-07-11 | 5810-801-0956 | 1.70 ppb |
2017-08-08 | 5810-005-1025 | 2.20 ppb |
2017-08-08 | 5810-800-1118 | 5.50 ppb |
2017-08-08 | 5810-801-1058 | 3.30 ppb |
2017-08-22 | 5701-008-1525 | 1.73 ppb |
2017-09-12 | 5810-005-1452 | 2.30 ppb |
2017-09-12 | 5810-800-1411 | 3.10 ppb |
2017-09-12 | 5810-801-1353 | 3.50 ppb |
2017-10-10 | 5810-005-1500 | 4.30 ppb |
2017-10-10 | 5810-800-1331 | 4.80 ppb |
2017-10-10 | 5810-801-1317 | 5.10 ppb |
2017-11-13 | 5810-005-1303 | 6.80 ppb |
2017-11-13 | 5810-800-1358 | 9.90 ppb |
2017-11-13 | 5810-801-1419 | 8.90 ppb |
2017-12-12 | 5701-005-0850 | 2.75 ppb |
2017-12-12 | 5701-800-0850 | 3.11 ppb |
2017-12-12 | 5701-801-0850 | 2.90 ppb |
2018-01-09 | 5810-005-1120 | 7.90 ppb |
2018-01-09 | 5701-008-1108 | 2.74 ppb |
2018-01-09 | 5810-800-1228 | 8.20 ppb |
2018-01-09 | 5810-801-1202 | 6.60 ppb |
2018-02-13 | 5810-005-1107 | 16.0 ppb |
2018-02-13 | 5810-800-1319 | 20.0 ppb |
2018-02-13 | 5810-801-1259 | 20.0 ppb |
2018-03-01 | 5701-800-0804 | 13.4 ppb |
2018-03-01 | 5701-800-1545 | 11.9 ppb |
2018-03-01 | 5701-801-0806 | 11.0 ppb |
2018-03-01 | 5701-801-0807 | 4.44 ppb |
2018-03-13 | 5701-005-1246 | 10.5 ppb |
2018-03-13 | 5701-800-1248 | 12.2 ppb |
2018-03-13 | 5701-801-1248 | 11.6 ppb |
2018-04-10 | 5701-005-0814 | 9.44 ppb |
2018-04-10 | 5701-800-0813 | 11.3 ppb |
2018-04-10 | 5701-801-0813 | 8.45 ppb |
2018-05-15 | 5701-001-1052 | ND |
2018-05-15 | 5701-005-0940 | 2.56 ppb |
2018-05-15 | 5701-006-1038 | ND |
2018-05-15 | 5701-800-0941 | 10.6 ppb |
2018-05-15 | 5701-801-0941 | 4.44 ppb |
2018-06-12 | 5701-005-0829 | 8.45 ppb |
2018-06-12 | 5701-800-0828 | 10.2 ppb |
2018-06-12 | 5701-801-0828 | 8.58 ppb |
2018-07-17 | 5701-005-1538 | 13.7 ppb |
2018-07-17 | 5701-800-1505 | 13.8 ppb |
2018-07-17 | 5701-801-1518 | 13.6 ppb |
2018-08-14 | 5701-005-1004 | 10.4 ppb |
2018-08-14 | 5701-800-1004 | 13.3 ppb |
2018-08-14 | 5701-801-1004 | 14.2 ppb |
2018-08-21 | 5701-008-1337 | 2.86 ppb |
2018-09-18 | 5701-005-0830 | 18.9 ppb |
2018-09-18 | 5701-800-0829 | 22.8 ppb |
2018-09-18 | 5701-801-0830 | 22.9 ppb |
2018-10-02 | 5701-005-0910 | 39.1 ppb |
2018-10-02 | 5701-800-0909 | 37.0 ppb |
2018-10-02 | 5701-801-0910 | 41.1 ppb |
2018-10-30 | 5810-800-1538 | 14.0 ppb |
2018-10-30 | 5810-801-1519 | 30.0 ppb |
2018-11-13 | 5701-005-1005 | 28.7 ppb |
2018-11-13 | 5701-800-1006 | 33.7 ppb |
2018-11-13 | 5701-801-1006 | 33.6 ppb |
2018-12-11 | 5701-005-1350 | 28.5 ppb |
2018-12-11 | 5701-800-1351 | 26.4 ppb |
2018-12-11 | 5701-801-1351 | 24.8 ppb |
2019-01-08 | 5701-005-0813 | 24.0 ppb |
2019-01-08 | 5701-800-0814 | 18.9 ppb |
2019-01-08 | 5701-801-0814 | 19.3 ppb |
2019-01-22 | 5810-008-1125 | 9.90 ppb |
2019-02-12 | 5810-005-1109 | 34.0 ppb |
2019-02-12 | 5810-800-1229 | 31.0 ppb |
2019-02-12 | 5810-801-1208 | 29.0 ppb |
2019-03-12 | 5701-005-0907 | 10.3 ppb |
2019-03-12 | 5701-800-0908 | 29.8 ppb |
2019-03-12 | 5701-801-0908 | 29.2 ppb |
2019-04-09 | 5701-005-1518 | 1.59 ppb |
2019-04-09 | 5701-800-1014 | 16.4 ppb |
2019-04-09 | 5701-801-1001 | 1.56 ppb |
2019-05-14 | 5701-005-1012 | 13.4 ppb |
2019-05-14 | 5701-800-1011 | 22.4 ppb |
2019-05-14 | 5701-801-1011 | 23.5 ppb |
2019-06-10 | 5701-800-1018 | 11.5 ppb |
2019-06-10 | 5701-801-1018 | 11.0 ppb |
2019-06-11 | 5701-800-1018 | 6.65 ppb |
2019-06-11 | 5701-801-1400 | 7.08 ppb |
2019-06-25 | 5701-005-1146 | ND |
2019-06-25 | 5701-800-1157 | ND |
2019-06-25 | 5701-801-1130 | ND |
2019-07-16 | 5701-005-0959 | 2.87 ppb |
2019-07-16 | 5701-800-1207 | 3.00 ppb |
2019-07-16 | 5701-801-1153 | 2.94 ppb |
2019-08-13 | 5701-005-1252 | 4.58 ppb |
2019-08-13 | 5701-800-1319 | 6.04 ppb |
2019-08-13 | 5701-801-1339 | 5.14 ppb |
2019-08-20 | 5701-008-0839 | 13.5 ppb |
2019-09-17 | 5701-005-1232 | 2.75 ppb |
2019-09-17 | 5701-800-1253 | 4.07 ppb |
2019-09-17 | 5701-801-1304 | 3.01 ppb |
2019-10-15 | 5701-001-1500 | ND |
2019-10-15 | 5701-005-1510 | 2.09 ppb |
2019-10-15 | 5701-800-1354 | 1.99 ppb |
2019-10-15 | 5701-801-1339 | 3.15 ppb |
2019-11-12 | 5701-005-1226 | 22.4 ppb |
2019-11-12 | 5701-800-1355 | 17.8 ppb |
2019-11-12 | 5701-801-1408 | 16.7 ppb |
2019-12-10 | 5701-005-1455 | 14.2 ppb |
2019-12-10 | 5701-800-1445 | 9.15 ppb |
2019-12-10 | 5701-801-1431 | 9.17 ppb |