Dibromochloromethane
CTWC - Naugatuck Region-Central System
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | 1.88 ppb | 20 | 16 | ND - 3.60 ppb |
2015 | 1.75 ppb | 20 | 17 | ND - 2.90 ppb |
2016 | 1.75 ppb | 20 | 18 | ND - 2.90 ppb |
2017 | 1.47 ppb | 19 | 17 | ND - 2.80 ppb |
2018 | 1.38 ppb | 20 | 17 | ND - 2.70 ppb |
2019 | 2.44 ppb | 17 | 17 | 0.700 ppb - 3.60 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 |
---|---|---|
2014-02-25 | 2226THM | 1.40 ppb |
2014-02-25 | 2227THM | 2.00 ppb |
2014-02-25 | 2228THM | 2.00 ppb |
2014-03-04 | BG14936VOC1 | 1.000 ppb |
2014-03-06 | BG16206VOC1 | ND |
2014-03-06 | BG16207VOC1 | ND |
2014-04-29 | BG38084VOC1 | ND |
2014-05-28 | 7179THM | 1.90 ppb |
2014-05-28 | 7180THM | 2.90 ppb |
2014-05-28 | 7181THM | 2.70 ppb |
2014-05-28 | 7182THM | 2.80 ppb |
2014-07-28 | BG82699VOC1 | ND |
2014-08-26 | BG99593TTHM | 2.40 ppb |
2014-08-26 | BG99594TTHM | 3.20 ppb |
2014-08-26 | BG99595TTHM | 3.10 ppb |
2014-08-26 | BG99596TTHM | 3.60 ppb |
2014-11-24 | BH45201TTHM | 1.50 ppb |
2014-11-24 | BH45202TTHM | 2.40 ppb |
2014-11-24 | BH45203TTHM | 2.30 ppb |
2014-11-24 | BH45204TTHM | 2.40 ppb |
2015-02-17 | BH74013VOC1 | 0.870 ppb |
2015-02-27 | BH78480TTHM | 1.90 ppb |
2015-02-27 | BH78479TTHM | 1.60 ppb |
2015-02-27 | BH78481TTHM | 1.70 ppb |
2015-02-27 | BH78478TTHM | 1.40 ppb |
2015-03-16 | BH83835VOC1 | ND |
2015-03-16 | BH83838VOC1 | ND |
2015-05-26 | BJ21443TTHM | 2.20 ppb |
2015-05-26 | BJ21442TTHM | 1.60 ppb |
2015-05-26 | BJ21444TTHM | 2.30 ppb |
2015-05-26 | BJ21445TTHM | 2.20 ppb |
2015-08-18 | BJ76634TTHM | 2.80 ppb |
2015-08-18 | BJ76633TTHM | 2.10 ppb |
2015-08-18 | BJ76635TTHM | 2.50 ppb |
2015-08-18 | BJ76636TTHM | 2.90 ppb |
2015-11-09 | BK20857TTHM | 2.40 ppb |
2015-11-09 | BK20856TTHM | 1.60 ppb |
2015-11-09 | BK20858TTHM | 2.30 ppb |
2015-11-09 | BK20859TTHM | 2.60 ppb |
2015-11-11 | BK21527VOC1 | ND |
2016-01-19 | BK54678VOC1 | 0.790 ppb |
2016-02-09 | BK63010TTHM | 0.970 ppb |
2016-02-09 | BK63011TTHM | 1.60 ppb |
2016-02-09 | BK63012TTHM | 1.20 ppb |
2016-02-09 | BK63013TTHM | 1.70 ppb |
2016-03-09 | BK76130VOC1 | ND |
2016-04-12 | BN12472VOC1 | ND |
2016-05-17 | BN33271TTHM | 1.20 ppb |
2016-05-17 | BN33272TTHM | 1.60 ppb |
2016-05-17 | BN33273TTHM | 1.60 ppb |
2016-05-17 | BN33274TTHM | 1.70 ppb |
2016-08-16 | BN92714TTHM | 2.50 ppb |
2016-08-16 | BN92715TTHM | 2.90 ppb |
2016-08-16 | BN92716TTHM | 2.80 ppb |
2016-08-16 | BN92717TTHM | 2.90 ppb |
2016-11-14 | BV85888VOC1 | 1.40 ppb |
2016-11-15 | BV83243TTHM | 1.90 ppb |
2016-11-15 | BV83244TTHM | 2.50 ppb |
2016-11-15 | BV83245TTHM | 2.80 ppb |
2016-11-15 | BV83246TTHM | 2.90 ppb |
2017-01-11 | BX19357VOC1 | 1.30 ppb |
2017-01-17 | BX30447VOC1 | ND |
2017-02-14 | BX61009TTHM | 1.20 ppb |
2017-02-14 | BX61010TTHM | 1.60 ppb |
2017-02-14 | BX61011TTHM | 1.50 ppb |
2017-02-14 | BX61012TTHM | 1.50 ppb |
2017-05-16 | BY21158TTHM | 0.900 ppb |
2017-05-16 | BY21159TTHM | 0.980 ppb |
2017-05-16 | BY21160TTHM | 1.20 ppb |
2017-05-16 | BY21161TTHM | 1.40 ppb |
2017-05-23 | BY28091VOC1 | ND |
2017-08-22 | BY88369TTHM | 2.30 ppb |
2017-08-22 | BY88370TTHM | 2.80 ppb |
2017-08-22 | BY88371TTHM | 2.60 ppb |
2017-08-22 | BY88372TTHM | 2.60 ppb |
2017-11-20 | BZ44480TTHM | 0.970 ppb |
2017-11-20 | BZ44481TTHM | 1.70 ppb |
2017-11-20 | BZ44482TTHM | 1.50 ppb |
2017-11-20 | BZ44483TTHM | 1.80 ppb |
2018-01-15 | BZ72858VOC1 | 0.750 ppb |
2018-02-13 | BZ88506VOC1 | ND |
2018-02-14 | BZ89697TTHM | 1.10 ppb |
2018-02-14 | BZ89698TTHM | 1.20 ppb |
2018-02-14 | BZ89699TTHM | 1.30 ppb |
2018-02-14 | BZ89700TTHM | 1.40 ppb |
2018-05-21 | CA50437TTHM | 1.30 ppb |
2018-05-21 | CA50438TTHM | 0.950 ppb |
2018-05-21 | CA50439TTHM | 1.30 ppb |
2018-05-21 | CA50440TTHM | 1.30 ppb |
2018-05-21 | CA50441VOC1 | ND |
2018-06-11 | CA67845VOC1 | ND |
2018-08-20 | CB14939 | 1.70 ppb |
2018-08-20 | CB14940 | 2.00 ppb |
2018-08-20 | CB14941 | 1.80 ppb |
2018-08-20 | CB14942 | 1.90 ppb |
2018-11-20 | DBP 200513502 | 2.70 ppb |
2018-11-20 | DBP 200513504 | 2.40 ppb |
2018-11-20 | DBP 200513506 | 1.80 ppb |
2018-11-20 | DBP 200513534 | 2.60 ppb |
2019-02-12 | VOC1 200521378 | 0.700 ppb |
2019-02-20 | DBP 200522447 | 1.40 ppb |
2019-02-20 | DBP 200522448 | 1.50 ppb |
2019-02-20 | DBP 200522449 | 1.60 ppb |
2019-02-20 | DBP 200522450 | 1.30 ppb |
2019-05-21 | DBP 200533257 | 2.70 ppb |
2019-05-21 | DBP 200533258 | 2.50 ppb |
2019-05-21 | DBP 200533259 | 3.00 ppb |
2019-05-21 | DBP 200533260 | 1.90 ppb |
2019-08-20 | DBP 200545890 | 3.30 ppb |
2019-08-20 | DBP 200545891 | 3.40 ppb |
2019-08-20 | DBP 200545892 | 3.20 ppb |
2019-08-20 | DBP 200545893 | 2.40 ppb |
2019-11-19 | DBP 200557404 | 3.60 ppb |
2019-11-19 | DBP 200557405 | 3.50 ppb |
2019-11-19 | DBP 200557406 | 3.60 ppb |
2019-11-19 | DBP 200557407 | 1.80 ppb |