Bromoform
California American Water Company - Coronado
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 |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | 13.8 ppb | 32 | 32 | 3.00 ppb - 27.6 ppb |
2015 | 6.28 ppb | 32 | 32 | 1.50 ppb - 19.7 ppb |
2016 | 10.1 ppb | 32 | 32 | 2.00 ppb - 25.2 ppb |
2017 | 12.6 ppb | 32 | 32 | 2.10 ppb - 24.5 ppb |
2018 | 11.1 ppb | 32 | 32 | 2.30 ppb - 25.1 ppb |
2019 | 11.9 ppb | 32 | 32 | 3.60 ppb - 18.2 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 |
---|---|---|
2014-02-11 | 1225-900-1209 | 23.5 ppb |
2014-02-11 | 1225-901-1252 | 23.0 ppb |
2014-02-11 | 1225-902-1020 | 24.4 ppb |
2014-02-11 | 1225-903-1310 | 24.2 ppb |
2014-02-11 | 1225-904-1231 | 24.1 ppb |
2014-02-11 | 1225-905-1054 | 24.2 ppb |
2014-02-11 | 1225-906-0945 | 24.0 ppb |
2014-02-11 | 1225-907-1120 | 3.10 ppb |
2014-05-13 | 1225-900-1128 | 26.5 ppb |
2014-05-13 | 1225-901-1228 | 26.5 ppb |
2014-05-13 | 1225-902-0925 | 26.5 ppb |
2014-05-13 | 1225-903-1242 | 27.6 ppb |
2014-05-13 | 1225-904-1148 | 27.2 ppb |
2014-05-13 | 1225-905-0952 | 26.6 ppb |
2014-05-13 | 1225-906-0900 | 26.2 ppb |
2014-05-13 | 1225-907-1028 | 3.40 ppb |
2014-08-12 | 1225-900-1134 | 6.60 ppb |
2014-08-12 | 1225-901-1214 | 6.30 ppb |
2014-08-12 | 1225-902-1000 | 6.30 ppb |
2014-08-12 | 1225-903-1237 | 6.80 ppb |
2014-08-12 | 1225-904-1152 | 6.70 ppb |
2014-08-12 | 1225-905-1034 | 6.50 ppb |
2014-08-12 | 1225-906-0900 | 6.80 ppb |
2014-08-12 | 1225-907-1058 | 9.50 ppb |
2014-11-12 | 1225-900-1150 | 3.20 ppb |
2014-11-12 | 1225-901-1220 | 3.20 ppb |
2014-11-12 | 1225-902-0930 | 3.00 ppb |
2014-11-12 | 1225-903-1250 | 3.20 ppb |
2014-11-12 | 1225-904-1025 | 3.30 ppb |
2014-11-12 | 1225-905-0955 | 3.00 ppb |
2014-11-12 | 1225-906-0900 | 3.00 ppb |
2014-11-12 | 1225-907-1040 | 3.20 ppb |
2015-02-11 | 1225-900-1322 | 1.70 ppb |
2015-02-11 | 1225-901-1340 | 1.50 ppb |
2015-02-11 | 1225-902-1210 | 2.30 ppb |
2015-02-11 | 1225-903-1349 | 1.80 ppb |
2015-02-11 | 1225-904-1303 | 2.00 ppb |
2015-02-11 | 1225-905-1113 | 2.00 ppb |
2015-02-11 | 1225-906-1031 | 1.90 ppb |
2015-02-11 | 1225-907-1135 | 2.80 ppb |
2015-05-19 | 1225-900-1111 | 4.20 ppb |
2015-05-19 | 1225-901-1132 | 4.10 ppb |
2015-05-19 | 1225-902-1024 | 3.20 ppb |
2015-05-19 | 1225-903-1150 | 4.60 ppb |
2015-05-19 | 1225-904-1051 | 4.40 ppb |
2015-05-19 | 1225-905-0915 | 4.30 ppb |
2015-05-19 | 1225-906-0853 | 3.20 ppb |
2015-05-19 | 1225-907-0947 | 4.40 ppb |
2015-08-11 | 1225-900-1209 | 2.20 ppb |
2015-08-11 | 1225-901-1228 | 2.10 ppb |
2015-08-11 | 1225-902-1121 | 2.20 ppb |
2015-08-11 | 1225-903-1245 | 2.10 ppb |
2015-08-11 | 1225-904-1145 | 2.30 ppb |
2015-08-11 | 1225-905-1007 | 2.20 ppb |
2015-08-11 | 1225-906-0929 | 2.50 ppb |
2015-08-11 | 1225-907-1031 | 2.30 ppb |
2015-11-12 | 1225-900-1121 | 19.3 ppb |
2015-11-12 | 1225-901-1140 | 18.4 ppb |
2015-11-12 | 1225-902-1040 | 18.4 ppb |
2015-11-12 | 1225-903-1152 | 19.7 ppb |
2015-11-12 | 1225-904-1105 | 18.9 ppb |
2015-11-12 | 1225-905-0921 | 18.7 ppb |
2015-11-12 | 1225-906-0845 | 19.0 ppb |
2015-11-12 | 1225-907-0956 | 2.40 ppb |
2016-02-09 | 1225-900-1138 | 21.6 ppb |
2016-02-09 | 1225-901-1208 | 20.9 ppb |
2016-02-09 | 1225-902-1105 | 23.9 ppb |
2016-02-09 | 1225-903-1228 | 22.7 ppb |
2016-02-09 | 1225-904-1245 | 21.6 ppb |
2016-02-09 | 1225-905-0927 | 21.3 ppb |
2016-02-09 | 1225-906-0904 | 25.2 ppb |
2016-02-09 | 1225-907-0950 | 2.60 ppb |
2016-05-10 | 1225-900-1146 | 16.9 ppb |
2016-05-10 | 1225-901-1211 | 18.2 ppb |
2016-05-10 | 1225-902-1053 | 16.3 ppb |
2016-05-10 | 1225-903-1236 | 18.7 ppb |
2016-05-10 | 1225-904-1123 | 16.4 ppb |
2016-05-10 | 1225-905-0945 | 17.9 ppb |
2016-05-10 | 1225-906-0918 | 15.1 ppb |
2016-05-10 | 1225-907-1016 | 2.90 ppb |
2016-08-09 | 1225-900-1149 | 2.60 ppb |
2016-08-09 | 1225-901-1209 | 3.10 ppb |
2016-08-09 | 1225-902-1117 | 2.80 ppb |
2016-08-09 | 1225-903-1224 | 3.10 ppb |
2016-08-09 | 1225-904-1304 | 2.80 ppb |
2016-08-09 | 1225-905-0931 | 3.00 ppb |
2016-08-09 | 1225-906-0900 | 3.40 ppb |
2016-08-09 | 1225-907-1009 | 3.60 ppb |
2016-11-08 | 1225-900-1052 | 2.00 ppb |
2016-11-08 | 1225-901-1105 | 2.00 ppb |
2016-11-08 | 1225-902-1016 | 2.10 ppb |
2016-11-08 | 1225-903-1133 | 2.20 ppb |
2016-11-08 | 1225-904-1155 | 2.20 ppb |
2016-11-08 | 1225-905-0855 | 2.20 ppb |
2016-11-08 | 1225-906-0832 | 2.40 ppb |
2016-11-08 | 1225-907-0924 | 2.40 ppb |
2017-02-07 | 1225-900-1329 | 3.40 ppb |
2017-02-07 | 1225-901-1407 | 3.40 ppb |
2017-02-07 | 1225-902-1110 | 3.20 ppb |
2017-02-07 | 1225-903-1432 | 3.50 ppb |
2017-02-07 | 1225-904-1255 | 3.30 ppb |
2017-02-07 | 1225-905-0927 | 3.40 ppb |
2017-02-07 | 1225-906-1150 | 3.30 ppb |
2017-02-07 | 1225-907-0955 | 2.10 ppb |
2017-05-10 | 1225-900-1126 | 15.9 ppb |
2017-05-10 | 1225-901-1140 | 24.5 ppb |
2017-05-10 | 1225-902-1022 | 13.9 ppb |
2017-05-10 | 1225-903-1228 | 23.1 ppb |
2017-05-10 | 1225-904-1240 | 13.6 ppb |
2017-05-10 | 1225-905-0924 | 16.5 ppb |
2017-05-10 | 1225-906-1054 | 19.3 ppb |
2017-05-10 | 1225-907-0854 | 2.50 ppb |
2017-08-08 | 1225-900-1144 | 13.7 ppb |
2017-08-08 | 1225-901-1205 | 14.2 ppb |
2017-08-08 | 1225-902-1043 | 14.4 ppb |
2017-08-08 | 1225-903-1220 | 15.1 ppb |
2017-08-08 | 1225-904-1240 | 14.6 ppb |
2017-08-08 | 1225-905-1004 | 11.6 ppb |
2017-08-08 | 1225-906-1119 | 14.3 ppb |
2017-08-08 | 1225-907-0930 | 3.10 ppb |
2017-11-08 | 1225-900-1149 | 19.7 ppb |
2017-11-08 | 1225-901-1220 | 20.0 ppb |
2017-11-08 | 1225-902-1056 | 20.0 ppb |
2017-11-08 | 1225-903-1237 | 21.1 ppb |
2017-11-08 | 1225-904-1300 | 19.9 ppb |
2017-11-08 | 1225-905-0923 | 20.8 ppb |
2017-11-08 | 1225-906-1118 | 21.0 ppb |
2017-11-08 | 1225-907-0856 | 5.20 ppb |
2018-02-07 | 1225-900-1318 | 24.2 ppb |
2018-02-07 | 1225-901-1345 | 24.6 ppb |
2018-02-07 | 1225-902-1157 | 20.5 ppb |
2018-02-07 | 1225-903-1420 | 24.5 ppb |
2018-02-07 | 1225-904-1246 | 22.6 ppb |
2018-02-07 | 1225-905-1032 | 4.20 ppb |
2018-02-07 | 1225-906-1220 | 25.1 ppb |
2018-02-07 | 1225-907-1057 | 3.90 ppb |
2018-05-08 | 1225-900-1105 | 20.5 ppb |
2018-05-08 | 1225-901-1130 | 19.3 ppb |
2018-05-08 | 1225-902-1010 | 21.9 ppb |
2018-05-08 | 1225-903-1155 | 22.5 ppb |
2018-05-08 | 1225-904-1240 | 19.1 ppb |
2018-05-08 | 1225-905-0935 | 23.3 ppb |
2018-05-08 | 1225-906-1035 | 23.5 ppb |
2018-05-08 | 1225-907-0900 | 2.80 ppb |
2018-08-24 | 1225-900-1125 | 3.00 ppb |
2018-08-24 | 1225-901-1146 | 2.30 ppb |
2018-08-24 | 1225-902-1030 | 3.20 ppb |
2018-08-24 | 1225-903-1200 | 3.00 ppb |
2018-08-24 | 1225-904-1302 | 3.20 ppb |
2018-08-24 | 1225-905-1004 | 3.30 ppb |
2018-08-24 | 1225-906-1057 | 3.30 ppb |
2018-08-24 | 1225-907-0940 | 3.60 ppb |
2018-11-13 | 1225-900-1140 | 3.50 ppb |
2018-11-13 | 1225-901-1210 | 2.70 ppb |
2018-11-13 | 1225-902-1020 | 4.60 ppb |
2018-11-13 | 1225-903-1229 | 3.40 ppb |
2018-11-13 | 1225-904-1320 | 4.20 ppb |
2018-11-13 | 1225-905-1002 | 2.50 ppb |
2018-11-13 | 1225-906-1055 | 3.50 ppb |
2018-11-13 | 1225-907-0930 | 2.30 ppb |
2019-02-12 | 1225-900-1700 | 18.2 ppb |
2019-02-12 | 1225-901-1730 | 12.6 ppb |
2019-02-12 | 1225-902-1619 | 18.1 ppb |
2019-02-12 | 1225-903-1740 | 12.5 ppb |
2019-02-12 | 1225-904-1650 | 16.4 ppb |
2019-02-12 | 1225-905-1551 | 17.4 ppb |
2019-02-12 | 1225-906-1500 | 16.0 ppb |
2019-02-12 | 1225-907-1605 | 3.60 ppb |
2019-05-14 | 1225-900-1441 | 13.7 ppb |
2019-05-14 | 1225-901-1512 | 11.6 ppb |
2019-05-14 | 1225-902-1340 | 14.2 ppb |
2019-05-14 | 1225-903-1605 | 14.8 ppb |
2019-05-14 | 1225-904-1644 | 12.7 ppb |
2019-05-14 | 1225-905-1304 | 13.6 ppb |
2019-05-14 | 1225-906-1408 | 13.7 ppb |
2019-05-14 | 1225-907-1236 | 4.60 ppb |
2019-08-13 | 1225-900-1507 | 9.80 ppb |
2019-08-13 | 1225-901-1545 | 8.30 ppb |
2019-08-13 | 1225-902-1400 | 9.20 ppb |
2019-08-13 | 1225-903-1615 | 9.60 ppb |
2019-08-13 | 1225-904-1700 | 9.70 ppb |
2019-08-13 | 1225-905-1310 | 9.20 ppb |
2019-08-13 | 1225-906-1436 | 10.3 ppb |
2019-08-13 | 1225-907-1245 | 3.70 ppb |
2019-11-13 | 1225-900-1426 | 13.0 ppb |
2019-11-13 | 1225-901-1443 | 13.1 ppb |
2019-11-13 | 1225-902-1330 | 12.5 ppb |
2019-11-13 | 1225-903-1500 | 13.4 ppb |
2019-11-13 | 1225-904-1531 | 13.3 ppb |
2019-11-13 | 1225-905-1245 | 13.3 ppb |
2019-11-13 | 1225-906-1400 | 13.3 ppb |
2019-11-13 | 1225-907-1210 | 4.50 ppb |