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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Connecticut Water Company - Northern Region-Western 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.

MORE ABOUT THIS CONTAMINANT

 

230

Samples

0

Samples exceeding legal limit (MCL)

205

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20142.33 ppb4434ND - 6.10 ppb
20153.19 ppb3934ND - 6.70 ppb
20163.14 ppb3733ND - 6.20 ppb
20173.27 ppb3834ND - 7.80 ppb
20183.30 ppb3836ND - 6.80 ppb
20193.29 ppb34340.600 ppb - 6.30 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
2014-01-24BG03077VOC1ND
2014-01-29BG04659VOC10.530 ppb
2014-02-041747THM2.70 ppb
2014-02-041748THM2.20 ppb
2014-02-041749THM2.20 ppb
2014-02-041750THM4.20 ppb
2014-02-041751THM1.40 ppb
2014-02-041752THM1.20 ppb
2014-02-041753THM2.00 ppb
2014-02-041754THM2.50 ppb
2014-02-07BG08003VOC1ND
2014-04-03BG27981VOC1ND
2014-04-094561VOC11.10 ppb
2014-05-066108THM2.30 ppb
2014-05-066109THM3.10 ppb
2014-05-066110THM1.60 ppb
2014-05-066111THM3.00 ppb
2014-05-066112THM2.70 ppb
2014-05-066113THM2.50 ppb
2014-05-066114THM5.00 ppb
2014-05-096107THM2.00 ppb
2014-05-21BG47680VOC1ND
2014-06-04BG53346VOC1ND
2014-06-06BG54002VOC1ND
2014-06-17BG60666VOC1ND
2014-06-19BG62968VOC1ND
2014-07-11BG73249VOC1ND
2014-08-05BG88648TTHM3.00 ppb
2014-08-05BG88649TTHM4.50 ppb
2014-08-05BG88650TTHM4.70 ppb
2014-08-05BG88651TTHM3.40 ppb
2014-08-05BG88652TTHM5.30 ppb
2014-08-05BG88653TTHM2.60 ppb
2014-08-05BG88654TTHM4.70 ppb
2014-08-05BG88655TTHM6.10 ppb
2014-11-21BH44966VOC1ND
2014-11-25BH46470TTHM5.30 ppb
2014-11-25BH46471TTHM3.60 ppb
2014-11-25BH46472TTHM3.40 ppb
2014-11-25BH46473TTHM3.20 ppb
2014-11-25BH46474TTHM3.60 ppb
2014-11-25BH46475TTHM2.70 ppb
2014-11-25BH46476TTHM2.10 ppb
2014-11-25BH46477TTHM2.00 ppb
2015-01-20BH64902VOC11.50 ppb
2015-02-25BH77226TTHM1.60 ppb
2015-02-25BH77225TTHM2.00 ppb
2015-02-25BH77220TTHM2.90 ppb
2015-02-25BH77223TTHM2.70 ppb
2015-02-25BH77219TTHM4.50 ppb
2015-02-25BH77221TTHM2.30 ppb
2015-02-25BH77224TTHM2.50 ppb
2015-02-25BH77222TTHM2.00 ppb
2015-03-06BH80296VOC1ND
2015-04-29BJ09906VOC1ND
2015-04-30BJ10443VOC1ND
2015-05-21BJ20488TTHM3.00 ppb
2015-05-21BJ20486TTHM3.20 ppb
2015-05-21BJ20484TTHM3.50 ppb
2015-05-21BJ20482TTHM3.80 ppb
2015-05-21BJ20481TTHM4.80 ppb
2015-05-21BJ20485TTHM4.20 ppb
2015-05-21BJ20487TTHM2.70 ppb
2015-05-21BJ20483TTHM3.60 ppb
2015-07-01BJ40227VOC1ND
2015-07-02BJ41078VOC1ND
2015-07-30BJ65812VOC10.860 ppb
2015-08-20BJ78782TTHM6.10 ppb
2015-08-20BJ78786TTHM3.60 ppb
2015-08-20BJ78788TTHM3.70 ppb
2015-08-20BJ78783TTHM6.20 ppb
2015-08-20BJ78787TTHM3.90 ppb
2015-08-20BJ78781TTHM6.70 ppb
2015-08-20BJ78785TTHM5.80 ppb
2015-08-20BJ78784TTHM6.00 ppb
2015-11-24BK27970TTHM4.70 ppb
2015-11-24BK27972TTHM2.00 ppb
2015-11-24BK27973TTHM2.30 ppb
2015-11-24BK27966TTHM6.00 ppb
2015-11-24BK27967TTHM4.50 ppb
2015-11-24BK27968TTHM4.60 ppb
2015-11-24BK27969TTHM3.50 ppb
2015-11-24BK27971TTHM3.20 ppb
2016-01-12BK51386VOC11.20 ppb
2016-01-15BK53768VOC1ND
2016-02-04BK61857TTHM4.90 ppb
2016-02-04BK61858TTHM3.20 ppb
2016-02-04BK61859TTHM3.00 ppb
2016-02-04BK61860TTHM2.90 ppb
2016-02-04BK61861TTHM3.50 ppb
2016-02-04BK61862TTHM2.90 ppb
2016-02-04BK61863TTHM1.80 ppb
2016-02-04BK61864TTHM1.80 ppb
2016-05-05BN26300TTHM4.70 ppb
2016-05-05BN26301TTHM3.20 ppb
2016-05-05BN26302TTHM2.70 ppb
2016-05-05BN26303TTHM2.50 ppb
2016-05-05BN26304TTHM3.10 ppb
2016-05-05BN26305TTHM2.60 ppb
2016-05-05BN26306TTHM1.70 ppb
2016-05-05BN26307TTHM1.90 ppb
2016-05-25BN40000VOC1ND
2016-06-09BN51878VOC1ND
2016-07-15BN73865VOC1ND
2016-08-18BN94948TTHM5.90 ppb
2016-08-18BN94949TTHM5.60 ppb
2016-08-18BN94950TTHM4.90 ppb
2016-08-18BN94951TTHM3.80 ppb
2016-08-18BN94952TTHM5.50 ppb
2016-08-18BN94953TTHM3.00 ppb
2016-08-18BN94954TTHM4.20 ppb
2016-08-18BN94955TTHM3.60 ppb
2016-11-03BV75338TTHM6.20 ppb
2016-11-03BV75339TTHM4.90 ppb
2016-11-03BV75340TTHM5.10 ppb
2016-11-03BV75341TTHM2.80 ppb
2016-11-03BV75342TTHM4.90 ppb
2016-11-03BV75343TTHM3.70 ppb
2016-11-03BV75344TTHM2.30 ppb
2016-11-03BV75345TTHM2.20 ppb
2017-02-02BX44867TTHM4.40 ppb
2017-02-02BX44868TTHM3.30 ppb
2017-02-02BX44869TTHM3.70 ppb
2017-02-02BX44870TTHM2.10 ppb
2017-02-02BX44871TTHM2.90 ppb
2017-02-02BX44872TTHM2.50 ppb
2017-02-02BX44873TTHM1.70 ppb
2017-02-02BX44874TTHM1.90 ppb
2017-02-08BX57435VOC11.10 ppb
2017-03-03BX79851VOC10.620 ppb
2017-03-03BX79849VOC1ND
2017-04-21BY07962VOC1ND
2017-05-04BY15439TTHM4.50 ppb
2017-05-04BY15440TTHM2.90 ppb
2017-05-04BY15441TTHM3.20 ppb
2017-05-04BY15442TTHM1.80 ppb
2017-05-04BY15443TTHM2.70 ppb
2017-05-04BY15444TTHM2.60 ppb
2017-05-04BY15445TTHM1.80 ppb
2017-05-04BY15446TTHM1.80 ppb
2017-06-01BY32099VOC1ND
2017-07-07BY54441VOC1ND
2017-08-07BY79801TTHM7.80 ppb
2017-08-07BY79802TTHM6.80 ppb
2017-08-07BY79803TTHM6.80 ppb
2017-08-07BY79804TTHM5.10 ppb
2017-08-07BY79805TTHM6.50 ppb
2017-08-07BY79806TTHM5.90 ppb
2017-08-07BY79807TTHM5.40 ppb
2017-08-07BY79808TTHM5.10 ppb
2017-11-06BZ33918TTHM3.60 ppb
2017-11-16BZ43465TTHM5.70 ppb
2017-11-16BZ43466TTHM2.90 ppb
2017-11-16BZ43467TTHM3.50 ppb
2017-11-16BZ43468TTHM5.20 ppb
2017-11-16BZ43469TTHM3.60 ppb
2017-11-16BZ43470TTHM2.70 ppb
2017-11-16BZ43471TTHM2.20 ppb
2018-01-23BZ78888VOC11.50 ppb
2018-01-31BZ82950VOC1ND
2018-02-01BZ83504TTHM3.50 ppb
2018-02-01BZ83505TTHM2.70 ppb
2018-02-01BZ83506TTHM2.50 ppb
2018-02-01BZ83507TTHM2.80 ppb
2018-02-01BZ83508TTHM2.10 ppb
2018-02-01BZ83509TTHM1.70 ppb
2018-02-01BZ83510TTHM1.60 ppb
2018-02-21BZ93283TTHM2.30 ppb
2018-05-03CA41161TTHM3.80 ppb
2018-05-03CA41162TTHM3.60 ppb
2018-05-03CA41163TTHM3.40 ppb
2018-05-03CA41164TTHM4.00 ppb
2018-05-03CA41165TTHM2.70 ppb
2018-05-03CA41166TTHM2.30 ppb
2018-05-03CA41167TTHM2.30 ppb
2018-05-03D8E0468-01VOC3.80 ppb
2018-05-15CA48118TTHM2.60 ppb
2018-07-13CA89901ND
2018-08-02CB040205.40 ppb
2018-08-02CB040214.40 ppb
2018-08-02CB040225.80 ppb
2018-08-02CB040234.40 ppb
2018-08-02CB040243.60 ppb
2018-08-02CB040253.60 ppb
2018-08-02CB040263.50 ppb
2018-08-06CB058404.20 ppb
2018-08-10DBP 2005020315.30 ppb
2018-08-10CB091545.00 ppb
2018-11-01DBP 2005111336.80 ppb
2018-11-01DBP 2005111344.40 ppb
2018-11-01DBP 2005111354.40 ppb
2018-11-01DBP 2005111364.10 ppb
2018-11-01DBP 2005111373.70 ppb
2018-11-01DBP 2005111382.30 ppb
2018-11-01DBP 2005111392.60 ppb
2018-11-05DBP 2005113892.80 ppb
2019-01-02VOC1 2005173091.80 ppb
2019-02-07DBP 2005210831.90 ppb
2019-02-07DBP 2005210843.00 ppb
2019-02-07DBP 2005210852.10 ppb
2019-02-07DBP 2005210863.20 ppb
2019-02-07DBP 2005210872.80 ppb
2019-02-07DBP 2005210883.40 ppb
2019-02-07DBP 2005210894.60 ppb
2019-02-11DBP 2005212562.20 ppb
2019-03-15VOC1 2005248830.600 ppb
2019-05-09DBP 2005315753.20 ppb
2019-05-09DBP 2005315762.30 ppb
2019-05-09DBP 2005315772.40 ppb
2019-05-09DBP 2005315822.40 ppb
2019-05-09DBP 2005315841.80 ppb
2019-05-09DBP 2005315861.30 ppb
2019-05-09DBP 2005315871.30 ppb
2019-05-13DBP 2005318372.20 ppb
2019-08-01DBP 2005427226.30 ppb
2019-08-01DBP 2005427234.80 ppb
2019-08-01DBP 2005427244.80 ppb
2019-08-01DBP 2005427255.30 ppb
2019-08-01DBP 2005427264.10 ppb
2019-08-01DBP 2005427273.00 ppb
2019-08-01DBP 2005427282.90 ppb
2019-08-13DBP 2005447584.10 ppb
2019-11-07DBP 2005558285.50 ppb
2019-11-07DBP 2005558305.00 ppb
2019-11-07DBP 2005558314.80 ppb
2019-11-07DBP 2005558325.30 ppb
2019-11-07DBP 2005558333.80 ppb
2019-11-07DBP 2005558343.40 ppb
2019-11-07DBP 2005558352.90 ppb
2019-11-18DBP 2005570043.20 ppb