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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

CTWC - Naugatuck Region-Central System

Bromodichloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromodichloromethane 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

 

116

Samples

0

Samples exceeding legal limit (MCL)

102

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20145.66 ppb2016ND - 8.90 ppb
20156.32 ppb2017ND - 9.10 ppb
20166.51 ppb2018ND - 10.00 ppb
20176.38 ppb1917ND - 10.00 ppb
20186.35 ppb2017ND - 10.5 ppb
20198.11 ppb17173.10 ppb - 12.3 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.06 ppb

The EWG Health Guideline of 0.06 ppb for bromodichloromethane 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
2014-02-252226THM6.10 ppb
2014-02-252227THM8.60 ppb
2014-02-252228THM8.90 ppb
2014-03-04BG14936VOC13.30 ppb
2014-03-06BG16206VOC1ND
2014-03-06BG16207VOC1ND
2014-04-29BG38084VOC1ND
2014-05-287179THM3.90 ppb
2014-05-287180THM7.20 ppb
2014-05-287181THM7.50 ppb
2014-05-287182THM7.40 ppb
2014-07-28BG82699VOC1ND
2014-08-26BG99593TTHM5.90 ppb
2014-08-26BG99594TTHM8.20 ppb
2014-08-26BG99595TTHM8.00 ppb
2014-08-26BG99596TTHM8.60 ppb
2014-11-24BH45201TTHM5.00 ppb
2014-11-24BH45202TTHM8.20 ppb
2014-11-24BH45203TTHM8.30 ppb
2014-11-24BH45204TTHM8.10 ppb
2015-02-17BH74013VOC13.00 ppb
2015-02-27BH78479TTHM5.90 ppb
2015-02-27BH78481TTHM6.40 ppb
2015-02-27BH78480TTHM7.60 ppb
2015-02-27BH78478TTHM5.40 ppb
2015-03-16BH83835VOC1ND
2015-03-16BH83838VOC1ND
2015-05-26BJ21443TTHM8.50 ppb
2015-05-26BJ21444TTHM8.60 ppb
2015-05-26BJ21442TTHM5.70 ppb
2015-05-26BJ21445TTHM8.50 ppb
2015-08-18BJ76634TTHM9.10 ppb
2015-08-18BJ76635TTHM8.70 ppb
2015-08-18BJ76633TTHM7.70 ppb
2015-08-18BJ76636TTHM8.90 ppb
2015-11-09BK20857TTHM8.40 ppb
2015-11-09BK20858TTHM8.80 ppb
2015-11-09BK20859TTHM8.90 ppb
2015-11-09BK20856TTHM6.30 ppb
2015-11-11BK21527VOC1ND
2016-01-19BK54678VOC13.10 ppb
2016-02-09BK63010TTHM4.60 ppb
2016-02-09BK63011TTHM7.80 ppb
2016-02-09BK63012TTHM5.60 ppb
2016-02-09BK63013TTHM8.00 ppb
2016-03-09BK76130VOC1ND
2016-04-12BN12472VOC1ND
2016-05-17BN33271TTHM4.90 ppb
2016-05-17BN33272TTHM7.60 ppb
2016-05-17BN33273TTHM7.50 ppb
2016-05-17BN33274TTHM7.60 ppb
2016-08-16BN92714TTHM8.10 ppb
2016-08-16BN92715TTHM9.10 ppb
2016-08-16BN92716TTHM8.70 ppb
2016-08-16BN92717TTHM8.90 ppb
2016-11-14BV85888VOC13.20 ppb
2016-11-15BV83243TTHM6.40 ppb
2016-11-15BV83244TTHM9.80 ppb
2016-11-15BV83245TTHM10.00 ppb
2016-11-15BV83246TTHM9.20 ppb
2017-01-11BX19357VOC13.20 ppb
2017-01-17BX30447VOC1ND
2017-02-14BX61009TTHM4.50 ppb
2017-02-14BX61010TTHM6.60 ppb
2017-02-14BX61011TTHM6.60 ppb
2017-02-14BX61012TTHM6.70 ppb
2017-05-16BY21158TTHM4.50 ppb
2017-05-16BY21159TTHM7.00 ppb
2017-05-16BY21160TTHM6.60 ppb
2017-05-16BY21161TTHM7.40 ppb
2017-05-23BY28091VOC1ND
2017-08-22BY88369TTHM8.60 ppb
2017-08-22BY88370TTHM10.00 ppb
2017-08-22BY88371TTHM9.50 ppb
2017-08-22BY88372TTHM9.20 ppb
2017-11-20BZ44480TTHM5.30 ppb
2017-11-20BZ44481TTHM8.20 ppb
2017-11-20BZ44482TTHM8.70 ppb
2017-11-20BZ44483TTHM8.70 ppb
2018-01-15BZ72858VOC13.80 ppb
2018-02-13BZ88506VOC1ND
2018-02-14BZ89697TTHM6.30 ppb
2018-02-14BZ89698TTHM7.90 ppb
2018-02-14BZ89699TTHM7.30 ppb
2018-02-14BZ89700TTHM8.10 ppb
2018-05-21CA50437TTHM6.50 ppb
2018-05-21CA50438TTHM4.60 ppb
2018-05-21CA50439TTHM6.70 ppb
2018-05-21CA50440TTHM6.30 ppb
2018-05-21CA50441VOC1ND
2018-06-11CA67845VOC1ND
2018-08-20CB149396.80 ppb
2018-08-20CB149408.40 ppb
2018-08-20CB149417.70 ppb
2018-08-20CB149428.40 ppb
2018-11-20DBP 20051350210.1 ppb
2018-11-20DBP 2005135049.90 ppb
2018-11-20DBP 2005135067.70 ppb
2018-11-20DBP 20051353410.5 ppb
2019-02-12VOC1 2005213783.10 ppb
2019-02-20DBP 2005224477.60 ppb
2019-02-20DBP 2005224487.40 ppb
2019-02-20DBP 2005224497.50 ppb
2019-02-20DBP 2005224506.10 ppb
2019-05-21DBP 2005332577.50 ppb
2019-05-21DBP 2005332587.00 ppb
2019-05-21DBP 2005332597.80 ppb
2019-05-21DBP 2005332604.40 ppb
2019-08-20DBP 2005458909.70 ppb
2019-08-20DBP 20054589110.1 ppb
2019-08-20DBP 2005458929.00 ppb
2019-08-20DBP 2005458936.90 ppb
2019-11-19DBP 20055740412.1 ppb
2019-11-19DBP 20055740512.3 ppb
2019-11-19DBP 20055740611.7 ppb
2019-11-19DBP 2005574077.60 ppb