Bromoform
Racine Waterworks
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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.450 ppb | 1 | 1 | 0.450 ppb |
| 2015 | 0.426 ppb | 8 | 6 | ND - 0.750 ppb |
| 2016 | 0.579 ppb | 16 | 16 | 0.320 ppb - 0.960 ppb |
| 2017 | 0.508 ppb | 17 | 14 | ND - 0.860 ppb |
| 2018 | 0.590 ppb | 16 | 13 | ND - 0.950 ppb |
| 2019 | 0.691 ppb | 16 | 16 | 0.520 ppb - 0.870 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 |
|---|---|---|
| 2014-03-11 | 774082 | 0.450 ppb |
| 2015-08-11 | 876492 | ND |
| 2015-08-11 | 876491 | ND |
| 2015-08-11 | 876490 | 0.630 ppb |
| 2015-08-11 | 876493 | 0.750 ppb |
| 2015-11-04 | 892716 | 0.360 ppb |
| 2015-11-04 | 892718 | 0.490 ppb |
| 2015-11-04 | 892717 | 0.520 ppb |
| 2015-11-04 | 892715 | 0.660 ppb |
| 2016-02-09 | 904677 | 0.350 ppb |
| 2016-02-09 | 904679 | 0.360 ppb |
| 2016-02-09 | 904680 | 0.330 ppb |
| 2016-02-09 | 904678 | 0.320 ppb |
| 2016-05-10 | 920430 | 0.420 ppb |
| 2016-05-10 | 920429 | 0.440 ppb |
| 2016-05-10 | 920432 | 0.460 ppb |
| 2016-05-10 | 920431 | 0.480 ppb |
| 2016-08-09 | 938053 | 0.650 ppb |
| 2016-08-09 | 938052 | 0.900 ppb |
| 2016-08-09 | 938051 | 0.820 ppb |
| 2016-08-09 | 938054 | 0.820 ppb |
| 2016-10-31 | 956483 | 0.610 ppb |
| 2016-10-31 | 956486 | 0.960 ppb |
| 2016-10-31 | 956484 | 0.730 ppb |
| 2016-10-31 | 956485 | 0.610 ppb |
| 2017-02-07 | 972742 | 0.470 ppb |
| 2017-02-07 | 972741 | 0.490 ppb |
| 2017-02-07 | 972743 | 0.490 ppb |
| 2017-02-07 | 972744 | 0.590 ppb |
| 2017-05-10 | 987746 | 0.480 ppb |
| 2017-05-10 | 987858 | 0.560 ppb |
| 2017-05-10 | 987859 | 0.600 ppb |
| 2017-05-10 | 987857 | 0.680 ppb |
| 2017-05-10 | 987860 | 0.710 ppb |
| 2017-08-08 | 1009623 | 0.460 ppb |
| 2017-08-08 | 1009624 | ND |
| 2017-08-08 | 1009622 | ND |
| 2017-08-08 | 1009625 | ND |
| 2017-11-08 | 1028765 | 0.600 ppb |
| 2017-11-08 | 1028764 | 0.820 ppb |
| 2017-11-08 | 1028766 | 0.830 ppb |
| 2017-11-08 | 1028767 | 0.860 ppb |
| 2018-02-06 | 1039779 | 0.560 ppb |
| 2018-02-06 | 1039777 | 0.570 ppb |
| 2018-02-06 | 1039780 | 0.610 ppb |
| 2018-02-06 | 1039778 | 0.760 ppb |
| 2018-05-08 | 1054549 | ND |
| 2018-05-08 | 1054548 | 0.530 ppb |
| 2018-05-08 | 1054550 | 0.610 ppb |
| 2018-05-08 | 1054547 | 0.630 ppb |
| 2018-08-07 | 1072148 | 0.850 ppb |
| 2018-08-07 | 1072145 | 0.950 ppb |
| 2018-08-07 | 1072147 | ND |
| 2018-08-07 | 1072146 | ND |
| 2018-11-06 | 1091339 | 0.820 ppb |
| 2018-11-06 | 1091340 | 0.840 ppb |
| 2018-11-06 | 1091342 | 0.900 ppb |
| 2018-11-06 | 1091341 | 0.810 ppb |
| 2019-02-05 | 1103810 | 0.520 ppb |
| 2019-02-05 | 1103808 | 0.530 ppb |
| 2019-02-05 | 1103811 | 0.540 ppb |
| 2019-02-05 | 1103809 | 0.590 ppb |
| 2019-05-07 | 1119570 | 0.780 ppb |
| 2019-05-07 | 1119568 | 0.870 ppb |
| 2019-05-07 | 1119569 | 0.860 ppb |
| 2019-05-07 | 1119567 | 0.700 ppb |
| 2019-08-06 | 1139115 | 0.590 ppb |
| 2019-08-06 | 1139117 | 0.810 ppb |
| 2019-08-06 | 1139116 | 0.830 ppb |
| 2019-08-06 | 1139118 | 0.850 ppb |
| 2019-11-05 | 1159265 | 0.550 ppb |
| 2019-11-05 | 1159264 | 0.570 ppb |
| 2019-11-05 | 1159267 | 0.630 ppb |
| 2019-11-05 | 1159266 | 0.830 ppb |