Dibromochloromethane
Bristol Water Department
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.
216
Samples
0
Samples exceeding legal limit (MCL)
214
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.882 ppb | 36 | 34 | ND - 2.10 ppb |
| 2015 | 1.18 ppb | 36 | 36 | 0.520 ppb - 2.20 ppb |
| 2016 | 1.14 ppb | 36 | 36 | 0.550 ppb - 2.80 ppb |
| 2017 | 1.36 ppb | 36 | 36 | 0.600 ppb - 2.50 ppb |
| 2018 | 0.961 ppb | 36 | 36 | 0.500 ppb - 1.80 ppb |
| 2019 | 1.05 ppb | 36 | 36 | 0.640 ppb - 1.86 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 | Lab ID | Result |
|---|---|---|
| 2014-01-10 | E401597-1VOC | ND |
| 2014-01-10 | E401597-2VOC | 0.950 ppb |
| 2014-01-10 | E401597-3VOC | 1.20 ppb |
| 2014-01-10 | E401597-4VOC | ND |
| 2014-02-06 | E402330-1TTHM | 0.600 ppb |
| 2014-02-06 | E402330-2TTHM | 0.670 ppb |
| 2014-02-06 | E402330-3TTHM | 1.30 ppb |
| 2014-02-06 | E402330-4TTHM | 1.70 ppb |
| 2014-02-06 | E402330-5TTHM | 1.70 ppb |
| 2014-02-06 | E402330-6TTHM | 0.730 ppb |
| 2014-02-06 | E402330-7TTHM | 0.630 ppb |
| 2014-02-06 | E402330-8TTHM | 0.660 ppb |
| 2014-05-01 | E405079-1TTHM | 0.580 ppb |
| 2014-05-01 | E405079-2TTHM | 0.580 ppb |
| 2014-05-01 | E405079-3TTHM | 0.670 ppb |
| 2014-05-01 | E405079-4TTHM | 0.660 ppb |
| 2014-05-01 | E405079-5TTHM | 0.610 ppb |
| 2014-05-01 | E405079-6TTHM | 0.720 ppb |
| 2014-05-01 | E405079-7TTHM | 0.510 ppb |
| 2014-05-01 | E405079-8TTHM | 0.590 ppb |
| 2014-08-01 | E408040-1TTHM | 1.10 ppb |
| 2014-08-01 | E408040-2TTHM | 1.20 ppb |
| 2014-08-01 | E408040-3TTHM | 1.50 ppb |
| 2014-08-01 | E408040-4TTHM | 2.10 ppb |
| 2014-08-01 | E408040-5TTHM | 1.70 ppb |
| 2014-08-01 | E408040-6TTHM | 1.30 ppb |
| 2014-08-01 | E408040-7TTHM | 1.000 ppb |
| 2014-08-01 | E408040-8TTHM | 1.20 ppb |
| 2014-11-05 | E411346-1TTHM | 0.660 ppb |
| 2014-11-05 | E411346-2TTHM | 0.650 ppb |
| 2014-11-05 | E411346-3TTHM | 0.690 ppb |
| 2014-11-05 | E411346-4TTHM | 0.790 ppb |
| 2014-11-05 | E411346-5TTHM | 0.680 ppb |
| 2014-11-05 | E411346-6TTHM | 0.790 ppb |
| 2014-11-05 | E411346-7TTHM | 0.600 ppb |
| 2014-11-05 | E411346-8TTHM | 0.740 ppb |
| 2015-02-05 | E502324-5TTHM | 1.10 ppb |
| 2015-02-05 | E502324-2TTHM | 0.780 ppb |
| 2015-02-05 | E502324-1TTHM | 0.620 ppb |
| 2015-02-05 | E502324-6TTHM | 0.860 ppb |
| 2015-02-05 | E502324-8TTHM | 0.680 ppb |
| 2015-02-05 | E502324-3TTHM | 1.10 ppb |
| 2015-02-05 | E502324-7TTHM | 0.620 ppb |
| 2015-02-05 | E502324-4TTHM | 1.20 ppb |
| 2015-03-09 | E503529-1VOC | 0.610 ppb |
| 2015-03-09 | E503529-4VOC | 0.570 ppb |
| 2015-03-09 | E503529-3VOC | 0.720 ppb |
| 2015-03-09 | E503529-2VOC | 0.610 ppb |
| 2015-05-08 | E505760-5TTHM | 1.000 ppb |
| 2015-05-08 | E505760-6TTHM | 0.640 ppb |
| 2015-05-08 | E505760-4TTHM | 0.780 ppb |
| 2015-05-08 | E505760-1TTHM | 0.610 ppb |
| 2015-05-08 | E505760-2TTHM | 0.620 ppb |
| 2015-05-08 | E505760-7TTHM | 0.520 ppb |
| 2015-05-08 | E505760-3TTHM | 0.680 ppb |
| 2015-05-08 | E505760-8TTHM | 0.620 ppb |
| 2015-08-06 | E508781-2TTHM | 2.10 ppb |
| 2015-08-06 | E508781-4TTHM | 2.10 ppb |
| 2015-08-06 | E508781-6TTHM | 2.20 ppb |
| 2015-08-06 | E508781-3TTHM | 2.10 ppb |
| 2015-08-06 | E508781-5TTHM | 2.00 ppb |
| 2015-08-06 | E508781-1TTHM | 2.10 ppb |
| 2015-08-06 | E508781-7TTHM | 1.90 ppb |
| 2015-08-06 | E508781-8TTHM | 1.50 ppb |
| 2015-11-05 | E511647-8TTHM | 1.40 ppb |
| 2015-11-05 | E511647-1TTHM | 1.50 ppb |
| 2015-11-05 | E511647-5TTHM | 1.30 ppb |
| 2015-11-05 | E511647-6TTHM | 1.60 ppb |
| 2015-11-05 | E511647-7TTHM | 1.30 ppb |
| 2015-11-05 | E511647-3TTHM | 1.60 ppb |
| 2015-11-05 | E511647-2TTHM | 1.40 ppb |
| 2015-11-05 | E511647-4TTHM | 1.50 ppb |
| 2016-02-11 | E602C26-1TTHM | 0.700 ppb |
| 2016-02-11 | E602C26-2TTHM | 1.10 ppb |
| 2016-02-11 | E602C26-3TTHM | 1.000 ppb |
| 2016-02-11 | E602C26-4TTHM | 2.10 ppb |
| 2016-02-11 | E602C26-5TTHM | 1.40 ppb |
| 2016-02-11 | E602C26-6TTHM | 0.960 ppb |
| 2016-02-11 | E602C26-7TTHM | 1.10 ppb |
| 2016-02-11 | E602C26-8TTHM | 0.740 ppb |
| 2016-03-11 | E603B92-1VOC | 0.840 ppb |
| 2016-03-11 | E603B92-4VOC | 0.640 ppb |
| 2016-03-11 | E603B92-3VOC | 0.610 ppb |
| 2016-03-11 | E603B92-2VOC | 0.550 ppb |
| 2016-05-12 | E605F87-1TTHM | 0.840 ppb |
| 2016-05-12 | E605F87-2TTHM | 1.000 ppb |
| 2016-05-12 | E605F87-3TTHM | 1.30 ppb |
| 2016-05-12 | E605F87-4TTHM | 1.60 ppb |
| 2016-05-12 | E605F87-5TTHM | 1.80 ppb |
| 2016-05-12 | E605F87-6TTHM | 0.970 ppb |
| 2016-05-12 | E605F87-7TTHM | 0.810 ppb |
| 2016-05-12 | E605F87-8TTHM | 0.790 ppb |
| 2016-08-04 | E608718-1TTHM | 1.20 ppb |
| 2016-08-04 | E608718-2TTHM | 1.20 ppb |
| 2016-08-04 | E608718-3TTHM | 1.50 ppb |
| 2016-08-04 | E608718-4TTHM | 2.80 ppb |
| 2016-08-04 | E608718-5TTHM | 1.70 ppb |
| 2016-08-04 | E608718-6TTHM | 1.20 ppb |
| 2016-08-04 | E608718-7TTHM | 1.10 ppb |
| 2016-08-04 | E608718-8TTHM | 1.10 ppb |
| 2016-11-03 | E611421-1TTHM | 1.000 ppb |
| 2016-11-03 | E611421-2TTHM | 1.50 ppb |
| 2016-11-03 | E611421-3TTHM | 1.20 ppb |
| 2016-11-03 | E611421-4TTHM | 1.20 ppb |
| 2016-11-03 | E611421-5TTHM | 0.870 ppb |
| 2016-11-03 | E611421-6TTHM | 1.000 ppb |
| 2016-11-03 | E611421-7TTHM | 0.960 ppb |
| 2016-11-03 | E611421-8TTHM | 0.780 ppb |
| 2017-02-06 | E702378-1TTHM | 1.40 ppb |
| 2017-02-06 | E702378-2TTHM | 1.50 ppb |
| 2017-02-06 | E702378-3TTHM | 1.90 ppb |
| 2017-02-06 | E702378-4TTHM | 2.40 ppb |
| 2017-02-06 | E702378-5TTHM | 2.40 ppb |
| 2017-02-06 | E702378-6TTHM | 1.10 ppb |
| 2017-02-06 | E702378-7TTHM | 1.40 ppb |
| 2017-02-06 | E702378-8TTHM | 1.20 ppb |
| 2017-05-04 | D7E0517-01VOC | 0.800 ppb |
| 2017-05-04 | D7E0517-02VOC | 0.900 ppb |
| 2017-05-04 | D7E0517-03VOC | 1.20 ppb |
| 2017-05-04 | D7E0517-04VOC | 2.40 ppb |
| 2017-05-04 | D7E0517-05VOC | 2.50 ppb |
| 2017-05-04 | D7E0517-06VOC | 0.800 ppb |
| 2017-05-04 | D7E0517-07VOC | 0.800 ppb |
| 2017-05-04 | D7E0517-08VOC | 1.60 ppb |
| 2017-05-04 | D7E0514-01VOC | 0.800 ppb |
| 2017-05-04 | D7E0514-04VOC | 0.600 ppb |
| 2017-05-04 | D7E0514-03VOC | 1.000 ppb |
| 2017-05-04 | D7E0514-02VOC | 0.600 ppb |
| 2017-08-04 | D7H0571-01VOC | 1.30 ppb |
| 2017-08-04 | D7H0571-02VOC | 1.30 ppb |
| 2017-08-04 | D7H0571-03VOC | 1.30 ppb |
| 2017-08-04 | D7H0571-04VOC | 1.40 ppb |
| 2017-08-04 | D7H0571-05VOC | 1.20 ppb |
| 2017-08-04 | D7H0571-06VOC | 1.10 ppb |
| 2017-08-04 | D7H0571-07VOC | 1.30 ppb |
| 2017-08-04 | D7H0571-08VOC | 1.40 ppb |
| 2017-11-01 | D7K0019-01VOC | 1.30 ppb |
| 2017-11-01 | D7K0019-02VOC | 1.30 ppb |
| 2017-11-01 | D7K0019-03VOC | 1.60 ppb |
| 2017-11-01 | D7K0019-04VOC | 1.40 ppb |
| 2017-11-01 | D7K0019-05VOC | 1.30 ppb |
| 2017-11-01 | D7K0019-06VOC | 1.30 ppb |
| 2017-11-01 | D7K0019-07VOC | 1.10 ppb |
| 2017-11-01 | D7K0019-08VOC | 1.90 ppb |
| 2018-01-10 | D8A0568-01VOC | 0.600 ppb |
| 2018-01-10 | D8A0568-04VOC | 0.500 ppb |
| 2018-01-10 | D8A0568-03VOC | 0.900 ppb |
| 2018-01-10 | D8A0568-02VOC | 1.10 ppb |
| 2018-02-01 | D8B0050-01VOC | 0.800 ppb |
| 2018-02-01 | D8B0050-02VOC | 0.800 ppb |
| 2018-02-01 | D8B0050-03VOC | 1.20 ppb |
| 2018-02-01 | D8B0050-04VOC | 1.40 ppb |
| 2018-02-01 | D8B0050-05VOC | 1.80 ppb |
| 2018-02-01 | D8B0050-06VOC | 0.800 ppb |
| 2018-02-01 | D8B0050-07VOC | 0.900 ppb |
| 2018-02-01 | D8B0050-08VOC | 1.000 ppb |
| 2018-05-02 | D8E0293-01VOC | 0.700 ppb |
| 2018-05-02 | D8E0293-02VOC | 0.700 ppb |
| 2018-05-02 | D8E0293-03VOC | 1.10 ppb |
| 2018-05-02 | D8E0293-04VOC | 1.30 ppb |
| 2018-05-02 | D8E0293-05VOC | 1.50 ppb |
| 2018-05-02 | D8E0293-06VOC | 0.700 ppb |
| 2018-05-02 | D8E0293-07VOC | 0.700 ppb |
| 2018-05-02 | D8E0293-08VOC | 0.700 ppb |
| 2018-08-03 | D8H0465-01VOC | 0.800 ppb |
| 2018-08-03 | D8H0465-02VOC | 0.800 ppb |
| 2018-08-03 | D8H0465-03VOC | 1.000 ppb |
| 2018-08-03 | D8H0465-04VOC | 1.000 ppb |
| 2018-08-03 | D8H0465-05VOC | 0.900 ppb |
| 2018-08-03 | D8H0465-06VOC | 0.700 ppb |
| 2018-08-03 | D8H0465-07VOC | 0.700 ppb |
| 2018-08-03 | D8H0465-08VOC | 0.900 ppb |
| 2018-11-21 | D8K2218-01VOC | 1.10 ppb |
| 2018-11-21 | D8K2218-02VOC | 1.10 ppb |
| 2018-11-21 | D8K2218-03VOC | 1.30 ppb |
| 2018-11-21 | D8K2218-04VOC | 1.20 ppb |
| 2018-11-21 | D8K2218-05VOC | 1.000 ppb |
| 2018-11-21 | D8K2218-06VOC | 1.000 ppb |
| 2018-11-21 | D8K2218-07VOC | 0.900 ppb |
| 2018-11-21 | D8K2218-08VOC | 1.000 ppb |
| 2019-02-07 | D9B0625-01VOC | 0.940 ppb |
| 2019-02-07 | D9B0625-02VOC | 1.07 ppb |
| 2019-02-07 | D9B0625-03VOC | 1.32 ppb |
| 2019-02-07 | D9B0625-04VOC | 1.52 ppb |
| 2019-02-07 | D9B0625-05VOC | 1.86 ppb |
| 2019-02-07 | D9B0625-06VOC | 0.820 ppb |
| 2019-02-07 | D9B0625-07VOC | 0.880 ppb |
| 2019-02-07 | D9B0625-08VOC | 0.950 ppb |
| 2019-05-16 | D9E1857-01VOC | 0.840 ppb |
| 2019-05-16 | D9E1857-02VOC | 0.740 ppb |
| 2019-05-16 | D9E1857-03VOC | 0.780 ppb |
| 2019-05-16 | D9E1857-04VOC | 1.03 ppb |
| 2019-05-16 | D9E1857-05VOC | 1.61 ppb |
| 2019-05-16 | D9E1857-06VOC | 0.660 ppb |
| 2019-05-16 | D9E1857-07VOC | 0.640 ppb |
| 2019-05-16 | D9E1857-08VOC | 0.800 ppb |
| 2019-08-22 | D9H2728-01VOC | 1.24 ppb |
| 2019-08-22 | D9H2728-02VOC | 1.34 ppb |
| 2019-08-22 | D9H2728-03VOC | 1.44 ppb |
| 2019-08-22 | D9H2728-04VOC | 1.33 ppb |
| 2019-08-22 | D9H2728-05VOC | 1.35 ppb |
| 2019-08-22 | D9H2728-06VOC | 1.06 ppb |
| 2019-08-22 | D9H2728-07VOC | 1.44 ppb |
| 2019-08-22 | D9H2728-08VOC | 1.29 ppb |
| 2019-10-28 | D9J2584-01VOC | 0.770 ppb |
| 2019-10-28 | D9J2584-04VOC | 0.800 ppb |
| 2019-10-28 | D9J2584-03VOC | 1.18 ppb |
| 2019-10-28 | D9J2584-02VOC | 1.37 ppb |
| 2019-11-20 | D9K1863-01VOC | 0.920 ppb |
| 2019-11-20 | D9K1863-02VOC | 0.790 ppb |
| 2019-11-20 | D9K1863-03VOC | 0.800 ppb |
| 2019-11-20 | D9K1863-04VOC | 0.910 ppb |
| 2019-11-20 | D9K1863-05VOC | 0.710 ppb |
| 2019-11-20 | D9K1863-06VOC | 0.750 ppb |
| 2019-11-20 | D9K1863-07VOC | 0.730 ppb |
| 2019-11-20 | D9K1863-08VOC | 0.960 ppb |