Bromoform
Green Bay 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.
106
Samples
0
Samples exceeding legal limit (MCL)
93
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 | 0.592 ppb | 25 | 18 | ND - 1.000 ppb |
| 2015 | 0.813 ppb | 16 | 16 | 0.700 ppb - 1.000 ppb |
| 2016 | 0.806 ppb | 16 | 16 | 0.600 ppb - 1.20 ppb |
| 2017 | 0.885 ppb | 17 | 17 | 0.440 ppb - 1.20 ppb |
| 2018 | 0.681 ppb | 16 | 15 | ND - 1.000 ppb |
| 2019 | 0.644 ppb | 16 | 16 | 0.340 ppb - 1.000 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 |
|---|---|---|
| 2014-02-10 | 2970809-10 | 0.800 ppb |
| 2014-02-10 | 2970811-12 | 0.900 ppb |
| 2014-02-10 | 2970813-14 | 0.900 ppb |
| 2014-02-10 | 2970807-08 | 1.000 ppb |
| 2014-05-05 | 3018977-78 | 0.600 ppb |
| 2014-05-05 | 3018979-80 | 0.700 ppb |
| 2014-05-05 | 3018975-76 | 0.700 ppb |
| 2014-05-05 | 3018973-74 | 0.800 ppb |
| 2014-05-19 | 790066 | ND |
| 2014-05-19 | 790049 | ND |
| 2014-05-19 | 790069 | ND |
| 2014-05-19 | 790062 | ND |
| 2014-05-19 | 790083 | ND |
| 2014-05-19 | 790058 | ND |
| 2014-05-19 | 790078 | ND |
| 2014-05-19 | 790053 | 0.390 ppb |
| 2014-05-19 | 790087 | 0.720 ppb |
| 2014-08-04 | 3074890-91 | 0.900 ppb |
| 2014-08-04 | 3074888-89 | 0.900 ppb |
| 2014-08-04 | 3074884-85 | 0.900 ppb |
| 2014-08-04 | 3074886-87 | 1.000 ppb |
| 2014-11-03 | 3132494-95 | 0.800 ppb |
| 2014-11-03 | 3132500-01 | 0.900 ppb |
| 2014-11-03 | 3132498-99 | 0.900 ppb |
| 2014-11-03 | 3132496-97 | 1.000 ppb |
| 2015-02-02 | 3179949-50 | 0.800 ppb |
| 2015-02-02 | 3179951-52 | 0.800 ppb |
| 2015-02-02 | 3179945-46 | 0.900 ppb |
| 2015-02-02 | 3179947-48 | 0.900 ppb |
| 2015-05-04 | 3235418-19 | 0.700 ppb |
| 2015-05-04 | 3235416-17 | 0.700 ppb |
| 2015-05-04 | 3235420-21 | 0.700 ppb |
| 2015-05-04 | 3235414-15 | 0.800 ppb |
| 2015-08-03 | 3291662-63 | 0.700 ppb |
| 2015-08-03 | 3291666-67 | 0.800 ppb |
| 2015-08-03 | 3291668-69 | 0.800 ppb |
| 2015-08-03 | 3291664-65 | 0.900 ppb |
| 2015-11-02 | 3350781-82 | 0.800 ppb |
| 2015-11-02 | 3350779-80 | 0.800 ppb |
| 2015-11-02 | 3350775-76 | 0.900 ppb |
| 2015-11-02 | 3350777-78 | 1.000 ppb |
| 2016-02-08 | 3397174-75 | 0.700 ppb |
| 2016-02-08 | 3397180-81 | 0.800 ppb |
| 2016-02-08 | 3397176-77 | 0.800 ppb |
| 2016-02-08 | 3397178-79 | 0.800 ppb |
| 2016-05-02 | 3440203-04 | 0.600 ppb |
| 2016-05-02 | 3440201-02 | 0.700 ppb |
| 2016-05-02 | 3440199-200 | 0.700 ppb |
| 2016-05-02 | 3440205-06 | 0.700 ppb |
| 2016-08-01 | 3508729-30 | 0.600 ppb |
| 2016-08-01 | 3508731-32 | 0.700 ppb |
| 2016-08-01 | 3508727-28 | 0.800 ppb |
| 2016-08-01 | 3508725-26 | 0.800 ppb |
| 2016-11-07 | 3581316-17 | 0.800 ppb |
| 2016-11-07 | 3581314-15 | 1.000 ppb |
| 2016-11-07 | 3581312-13 | 1.20 ppb |
| 2016-11-07 | 3581310-11 | 1.20 ppb |
| 2017-02-06 | 3633024-25 | 0.900 ppb |
| 2017-02-06 | 3633026-27 | 1.000 ppb |
| 2017-02-06 | 3633020-21 | 1.000 ppb |
| 2017-02-06 | 3633022-23 | 1.20 ppb |
| 2017-04-24 | 985191 | 0.440 ppb |
| 2017-05-08 | 3689854-55 | 0.700 ppb |
| 2017-05-08 | 3689860-61 | 0.700 ppb |
| 2017-05-08 | 3689858-59 | 0.700 ppb |
| 2017-05-08 | 3689856-57 | 0.800 ppb |
| 2017-08-07 | 3750421-22 | 0.800 ppb |
| 2017-08-07 | 3750427-28 | 0.800 ppb |
| 2017-08-07 | 3750425-26 | 0.800 ppb |
| 2017-08-07 | 3750423-24 | 0.900 ppb |
| 2017-11-01 | 3812516-17 | 1.000 ppb |
| 2017-11-01 | 3812518-19 | 1.000 ppb |
| 2017-11-01 | 3812514-15 | 1.10 ppb |
| 2017-11-01 | 3812512-13 | 1.20 ppb |
| 2018-02-05 | 1039625 | 0.560 ppb |
| 2018-02-05 | 1039626 | 0.590 ppb |
| 2018-02-05 | 1039627 | 0.660 ppb |
| 2018-02-05 | 1039624 | 0.810 ppb |
| 2018-05-07 | 1054225 | 0.520 ppb |
| 2018-05-07 | 1054224 | 0.520 ppb |
| 2018-05-07 | 1054222 | 0.600 ppb |
| 2018-05-07 | 1054223 | 0.610 ppb |
| 2018-08-06 | 1071910 | ND |
| 2018-08-06 | 1071911 | 0.750 ppb |
| 2018-08-06 | 1071909 | 0.880 ppb |
| 2018-08-06 | 1071912 | 1.000 ppb |
| 2018-11-05 | 1091211 | 0.790 ppb |
| 2018-11-05 | 1091208 | 0.840 ppb |
| 2018-11-05 | 1091209 | 0.880 ppb |
| 2018-11-05 | 1091210 | 0.890 ppb |
| 2019-02-06 | 1104122 | 0.580 ppb |
| 2019-02-06 | 1104121 | 0.590 ppb |
| 2019-02-06 | 1104119 | 0.610 ppb |
| 2019-02-06 | 1104120 | 0.640 ppb |
| 2019-05-06 | 1119223 | 0.380 ppb |
| 2019-05-06 | 1119224 | 0.440 ppb |
| 2019-05-06 | 1119221 | 0.540 ppb |
| 2019-05-06 | 1119222 | 0.550 ppb |
| 2019-08-05 | 1138514 | 0.640 ppb |
| 2019-08-05 | 1138513 | 0.690 ppb |
| 2019-08-05 | 1138511 | 0.710 ppb |
| 2019-08-05 | 1138512 | 0.880 ppb |
| 2019-10-30 | 1158218 | 0.340 ppb |
| 2019-10-30 | 1158217 | 0.790 ppb |
| 2019-10-30 | 1158215 | 0.930 ppb |
| 2019-10-30 | 1158216 | 1.000 ppb |