Dibromochloromethane
Peabody Water Department (MWRA)
Dibromochloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Dibromochloromethane and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.
183
Samples
0
Samples exceeding legal limit (MCL)
174
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 2.30 ppb | 3 | 2 | ND - 3.50 ppb |
| 2015 | 5.61 ppb | 36 | 32 | ND - 10.3 ppb |
| 2016 | 4.37 ppb | 37 | 36 | ND - 10.2 ppb |
| 2017 | 2.36 ppb | 35 | 34 | ND - 8.36 ppb |
| 2018 | 2.89 ppb | 33 | 32 | ND - 7.89 ppb |
| 2019 | 5.53 ppb | 39 | 38 | ND - 11.2 ppb |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 0.1 ppb
The EWG Health Guideline of 0.1 ppb for dibromochloromethane 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 | Result |
|---|---|
| 2014-01-30 | 3.50 ppb |
| 2014-01-30 | 3.40 ppb |
| 2014-07-07 | ND |
| 2015-01-12 | ND |
| 2015-01-12 | 4.50 ppb |
| 2015-01-12 | 5.55 ppb |
| 2015-02-11 | ND |
| 2015-02-11 | ND |
| 2015-02-11 | 4.59 ppb |
| 2015-02-11 | 3.44 ppb |
| 2015-02-11 | 3.65 ppb |
| 2015-02-11 | 3.29 ppb |
| 2015-02-11 | 2.98 ppb |
| 2015-02-11 | 3.62 ppb |
| 2015-05-13 | 6.42 ppb |
| 2015-05-13 | 7.11 ppb |
| 2015-05-13 | 5.18 ppb |
| 2015-05-13 | 8.39 ppb |
| 2015-05-13 | 8.26 ppb |
| 2015-05-13 | 8.84 ppb |
| 2015-05-13 | 7.45 ppb |
| 2015-05-13 | 6.37 ppb |
| 2015-07-14 | ND |
| 2015-08-13 | 3.56 ppb |
| 2015-08-13 | 0.850 ppb |
| 2015-08-13 | 7.61 ppb |
| 2015-08-13 | 9.76 ppb |
| 2015-08-13 | 8.73 ppb |
| 2015-08-13 | 8.61 ppb |
| 2015-08-13 | 7.89 ppb |
| 2015-08-13 | 8.28 ppb |
| 2015-11-16 | 5.87 ppb |
| 2015-11-16 | 0.970 ppb |
| 2015-11-16 | 6.85 ppb |
| 2015-11-16 | 10.3 ppb |
| 2015-11-16 | 6.00 ppb |
| 2015-11-16 | 9.73 ppb |
| 2015-11-16 | 8.71 ppb |
| 2015-11-16 | 8.54 ppb |
| 2016-01-25 | ND |
| 2016-01-25 | 4.94 ppb |
| 2016-01-25 | 3.13 ppb |
| 2016-02-16 | 2.32 ppb |
| 2016-02-16 | 0.810 ppb |
| 2016-02-16 | 3.77 ppb |
| 2016-02-16 | 5.16 ppb |
| 2016-02-16 | 3.28 ppb |
| 2016-02-16 | 3.82 ppb |
| 2016-02-16 | 4.02 ppb |
| 2016-02-16 | 3.63 ppb |
| 2016-05-17 | 0.730 ppb |
| 2016-05-17 | 0.690 ppb |
| 2016-05-17 | 4.55 ppb |
| 2016-05-17 | 3.82 ppb |
| 2016-05-17 | 3.95 ppb |
| 2016-05-17 | 3.70 ppb |
| 2016-05-17 | 2.71 ppb |
| 2016-05-17 | 2.81 ppb |
| 2016-07-14 | 6.42 ppb |
| 2016-07-15 | 4.81 ppb |
| 2016-08-16 | 2.06 ppb |
| 2016-08-16 | 5.13 ppb |
| 2016-08-16 | 8.33 ppb |
| 2016-08-16 | 10.2 ppb |
| 2016-08-16 | 6.42 ppb |
| 2016-08-16 | 4.11 ppb |
| 2016-08-16 | 8.89 ppb |
| 2016-08-16 | 5.56 ppb |
| 2016-11-15 | 2.56 ppb |
| 2016-11-15 | 1.26 ppb |
| 2016-11-15 | 7.14 ppb |
| 2016-11-15 | 4.01 ppb |
| 2016-11-15 | 4.58 ppb |
| 2016-11-15 | 7.48 ppb |
| 2016-11-15 | 8.11 ppb |
| 2016-11-15 | 6.65 ppb |
| 2017-01-30 | ND |
| 2017-01-30 | 4.95 ppb |
| 2017-01-30 | 3.81 ppb |
| 2017-02-15 | 1.42 ppb |
| 2017-02-15 | 3.16 ppb |
| 2017-02-15 | 3.01 ppb |
| 2017-02-15 | 3.50 ppb |
| 2017-02-15 | 2.25 ppb |
| 2017-02-15 | 3.05 ppb |
| 2017-02-15 | 3.13 ppb |
| 2017-02-15 | 2.66 ppb |
| 2017-05-15 | 1.61 ppb |
| 2017-05-15 | 0.970 ppb |
| 2017-05-15 | 4.18 ppb |
| 2017-05-15 | 0.900 ppb |
| 2017-05-15 | 3.70 ppb |
| 2017-05-15 | 3.38 ppb |
| 2017-05-15 | 0.910 ppb |
| 2017-05-15 | 3.21 ppb |
| 2017-08-16 | 1.06 ppb |
| 2017-08-16 | 1.19 ppb |
| 2017-08-16 | 8.36 ppb |
| 2017-08-16 | 1.17 ppb |
| 2017-08-16 | 1.24 ppb |
| 2017-08-16 | 1.06 ppb |
| 2017-08-16 | 0.940 ppb |
| 2017-08-16 | 1.64 ppb |
| 2017-11-15 | 0.800 ppb |
| 2017-11-15 | 0.790 ppb |
| 2017-11-15 | 5.01 ppb |
| 2017-11-15 | 0.760 ppb |
| 2017-11-15 | 4.27 ppb |
| 2017-11-15 | 0.760 ppb |
| 2017-11-15 | 0.720 ppb |
| 2017-11-15 | 3.15 ppb |
| 2018-02-05 | ND |
| 2018-02-05 | 6.84 ppb |
| 2018-02-15 | 0.620 ppb |
| 2018-02-15 | 0.640 ppb |
| 2018-02-15 | 6.28 ppb |
| 2018-02-15 | 0.720 ppb |
| 2018-02-15 | 5.51 ppb |
| 2018-02-15 | 0.650 ppb |
| 2018-02-15 | 0.560 ppb |
| 2018-02-15 | 2.20 ppb |
| 2018-05-17 | 0.940 ppb |
| 2018-05-17 | 5.82 ppb |
| 2018-05-17 | 0.960 ppb |
| 2018-05-17 | 5.33 ppb |
| 2018-05-17 | 1.01 ppb |
| 2018-05-17 | 0.890 ppb |
| 2018-05-17 | 1.30 ppb |
| 2018-08-16 | 0.890 ppb |
| 2018-08-16 | 0.920 ppb |
| 2018-08-16 | 7.89 ppb |
| 2018-08-16 | 0.860 ppb |
| 2018-08-16 | 4.85 ppb |
| 2018-08-16 | 0.860 ppb |
| 2018-08-16 | 0.750 ppb |
| 2018-08-16 | 0.890 ppb |
| 2018-11-15 | 3.13 ppb |
| 2018-11-15 | 2.65 ppb |
| 2018-11-15 | 5.85 ppb |
| 2018-11-15 | 5.19 ppb |
| 2018-11-15 | 5.12 ppb |
| 2018-11-15 | 4.81 ppb |
| 2018-11-15 | 4.71 ppb |
| 2018-11-15 | 5.64 ppb |
| 2019-02-13 | 2.49 ppb |
| 2019-02-13 | 1.04 ppb |
| 2019-02-13 | 4.71 ppb |
| 2019-02-13 | 4.10 ppb |
| 2019-02-13 | 3.68 ppb |
| 2019-02-13 | 3.35 ppb |
| 2019-02-13 | 4.29 ppb |
| 2019-02-13 | 4.26 ppb |
| 2019-02-21 | ND |
| 2019-02-21 | 4.80 ppb |
| 2019-02-21 | 4.23 ppb |
| 2019-05-15 | 6.31 ppb |
| 2019-05-15 | 5.88 ppb |
| 2019-05-15 | 5.69 ppb |
| 2019-05-15 | 6.05 ppb |
| 2019-05-15 | 5.91 ppb |
| 2019-05-15 | 5.88 ppb |
| 2019-05-15 | 5.38 ppb |
| 2019-05-15 | 6.09 ppb |
| 2019-08-15 | 8.31 ppb |
| 2019-08-15 | 11.2 ppb |
| 2019-08-15 | 6.28 ppb |
| 2019-08-15 | 10.00 ppb |
| 2019-08-15 | 8.02 ppb |
| 2019-08-15 | 10.5 ppb |
| 2019-08-15 | 10.7 ppb |
| 2019-08-15 | 8.07 ppb |
| 2019-08-15 | 9.58 ppb |
| 2019-08-15 | 6.88 ppb |
| 2019-11-13 | 3.02 ppb |
| 2019-11-13 | 4.98 ppb |
| 2019-11-13 | 4.23 ppb |
| 2019-11-13 | 4.90 ppb |
| 2019-11-13 | 3.77 ppb |
| 2019-11-13 | 4.25 ppb |
| 2019-11-13 | 5.23 ppb |
| 2019-11-13 | 4.05 ppb |
| 2019-11-13 | 3.99 ppb |
| 2019-11-13 | 3.76 ppb |