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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Danbury 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.

MORE ABOUT THIS CONTAMINANT

 

207

Samples

0

Samples exceeding legal limit (MCL)

206

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20142.07 ppb37370.600 ppb - 4.10 ppb
20152.14 ppb34340.780 ppb - 4.00 ppb
20162.24 ppb34340.960 ppb - 3.80 ppb
20172.36 ppb34341.65 ppb - 3.91 ppb
20182.69 ppb3433ND - 5.70 ppb
20192.48 ppb34341.40 ppb - 4.60 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
2014-02-18E402994-5VOC0.600 ppb
2014-02-18E402994-6VOC1.30 ppb
2014-03-11E403C94-2TTHM1.30 ppb
2014-03-11E403C94-4TTHM2.60 ppb
2014-03-11E403C94-7TTHM2.30 ppb
2014-03-12E403C94-1TTHM1.40 ppb
2014-03-13E403C94-6TTHM0.800 ppb
2014-03-14E403C94-8TTHM1.10 ppb
2014-03-17E403C94-3TTHM1.10 ppb
2014-03-18E403C94-5TTHM1.90 ppb
2014-06-10E406G56-4TTHM4.10 ppb
2014-06-10E406G56-6TTHM1.90 ppb
2014-06-11E406G56-1TTHM2.20 ppb
2014-06-12E406G56-2TTHM2.20 ppb
2014-06-12E406G56-7TTHM3.40 ppb
2014-06-12E406G56-8TTHM1.70 ppb
2014-06-13E406G56-5TTHM3.20 ppb
2014-06-16E406G56-3TTHM1.60 ppb
2014-09-10E409F66-1TTHM2.20 ppb
2014-09-11E409F66-4TTHM2.60 ppb
2014-09-11E409F66-6TTHM1.80 ppb
2014-09-12E409F66-2TTHM1.80 ppb
2014-09-12E409F66-8TTHM1.60 ppb
2014-09-15E409F66-3TTHM1.70 ppb
2014-09-23E409M19-1TTHM2.90 ppb
2014-09-23E409M19-2TTHM2.80 ppb
2014-09-23E409M19-3TTHM3.00 ppb
2014-09-30E409T37-2TTHM3.70 ppb
2014-09-30E410021-1TTHM3.40 ppb
2014-12-12E412D88-1TTHM1.70 ppb
2014-12-12E412D88-7TTHM2.50 ppb
2014-12-12E412D88-8TTHM1.000 ppb
2014-12-15E412D88-2TTHM1.10 ppb
2014-12-15E412D88-3TTHM1.20 ppb
2014-12-15E412D88-4TTHM3.70 ppb
2014-12-15E412D88-6TTHM0.980 ppb
2014-12-16E412D88-5TTHM2.30 ppb
2015-03-12E503B60-2TTHM1.60 ppb
2015-03-12E503B60-5TTHM2.40 ppb
2015-03-13E503B60-1TTHM1.50 ppb
2015-03-13E503B60-6TTHM1.000 ppb
2015-03-13E503B60-4TTHM2.60 ppb
2015-03-16E503B60-3TTHM1.20 ppb
2015-03-25E503J77-1TTHM1.30 ppb
2015-03-26E503J77-2TTHM2.60 ppb
2015-04-21E504H71-2VOC1.70 ppb
2015-04-21E504H71-1VOC0.780 ppb
2015-06-11E506H99-5TTHM2.50 ppb
2015-06-12E506H99-7TTHM2.80 ppb
2015-06-12E506H99-8TTHM1.10 ppb
2015-06-15E506H99-3TTHM1.10 ppb
2015-06-15E506H99-2TTHM1.40 ppb
2015-06-15E506H99-4TTHM2.90 ppb
2015-06-15E506H99-1TTHM1.80 ppb
2015-06-16E506H99-6TTHM1.40 ppb
2015-09-18E509O88-8TTHM2.40 ppb
2015-09-18E509O88-6TTHM3.00 ppb
2015-09-21E509O88-3TTHM2.30 ppb
2015-09-21E509O88-1TTHM3.30 ppb
2015-09-21E509O88-2TTHM2.60 ppb
2015-09-22E509O88-5TTHM3.10 ppb
2015-09-29E509W38-2TTHM2.90 ppb
2015-09-29E509W38-1TTHM3.70 ppb
2015-12-17E512K74-2-17TTHM1.50 ppb
2015-12-17E512K74-1-16TTHM1.60 ppb
2015-12-17E512K74-4-18TTHM3.70 ppb
2015-12-17E512K74-7-15TTHM4.00 ppb
2015-12-17E512K74-5-19TTHM3.00 ppb
2015-12-18E512K74-8-04TTHM1.60 ppb
2015-12-18E512K74-6-20TTHM1.30 ppb
2015-12-21E512K74-3-03TTHM1.10 ppb
2016-03-09E603E03-4-18TTHM2.90 ppb
2016-03-09E603E03-1-16TTHM1.90 ppb
2016-03-10E603E03-2-17TTHM1.50 ppb
2016-03-10E603E03-5-19TTHM2.60 ppb
2016-03-10E603E03-6-20TTHM1.40 ppb
2016-03-10E603E03-7-15TTHM2.70 ppb
2016-03-11E603E03-8-04TTHM1.40 ppb
2016-03-14E603E03-3-03TTHM1.40 ppb
2016-04-19E604J01-5VOC1.90 ppb
2016-04-19E604J01-6VOC0.960 ppb
2016-06-16E606O13-1-16TTHM2.60 ppb
2016-06-16E606O13-2-17TTHM2.10 ppb
2016-06-16E606O13-4-18TTHM3.80 ppb
2016-06-16E606O13-5-19TTHM3.00 ppb
2016-06-16E606O13-6-20TTHM2.00 ppb
2016-06-16E606O13-8-04TTHM1.80 ppb
2016-06-20E606O13-7-15TTHM3.40 ppb
2016-06-20E606O13-3-03TTHM1.60 ppb
2016-09-08188687CH2.05 ppb
2016-09-09188691CH1.68 ppb
2016-09-13188689CH3.59 ppb
2016-09-13188677CH1.85 ppb
2016-09-13188679CH1.85 ppb
2016-09-13188681CH1.82 ppb
2016-09-13188683CH2.85 ppb
2016-09-14188685CH3.36 ppb
2016-12-12192764CH1.74 ppb
2016-12-13192760CH2.89 ppb
2016-12-13192762CH2.68 ppb
2016-12-13192766CH2.94 ppb
2016-12-13192768CH1.74 ppb
2016-12-13192754CH2.05 ppb
2016-12-13192756CH2.33 ppb
2016-12-14192758CH1.76 ppb
2017-02-15194887GE2.40 ppb
2017-02-15194886GE2.00 ppb
2017-03-09196065GE2.64 ppb
2017-03-09196059GE2.17 ppb
2017-03-09196061GE2.27 ppb
2017-03-13196063GE2.00 ppb
2017-03-14196069GE1.85 ppb
2017-03-15196071GE2.50 ppb
2017-03-15196073GE2.08 ppb
2017-03-15196067GE2.41 ppb
2017-06-13200345GE2.96 ppb
2017-06-13200351GE2.54 ppb
2017-06-14200349GE1.85 ppb
2017-06-14200341GE2.04 ppb
2017-06-14200339GE2.08 ppb
2017-06-15200343GE1.65 ppb
2017-06-15200347GE2.25 ppb
2017-06-15200353GE1.98 ppb
2017-09-12204472GE2.90 ppb
2017-09-12204474GE2.79 ppb
2017-09-12204478GE3.91 ppb
2017-09-12204484GE3.45 ppb
2017-09-12204486GE2.43 ppb
2017-09-13204480GE3.74 ppb
2017-09-13204482GE2.69 ppb
2017-09-13204476GE2.38 ppb
2017-12-11208503GE1.83 ppb
2017-12-11208505GE2.37 ppb
2017-12-12208501GE2.09 ppb
2017-12-12208507GE2.62 ppb
2017-12-12208509GE1.73 ppb
2017-12-12208511GE2.29 ppb
2017-12-12208513GE1.73 ppb
2017-12-12208499GE1.75 ppb
2018-02-21210745GE2.74 ppb
2018-02-21210744GE1.89 ppb
2018-03-14211584GE2.09 ppb
2018-03-14211586GE1.96 ppb
2018-03-14211588GE2.01 ppb
2018-03-14211590GE3.17 ppb
2018-03-14211598GE1.91 ppb
2018-03-15211592GEND
2018-03-15211594GE2.02 ppb
2018-03-15211596GE3.23 ppb
2018-06-19215736GE2.09 ppb
2018-06-19215738GE2.39 ppb
2018-06-19215742GE3.66 ppb
2018-06-19215744GE3.79 ppb
2018-06-19215750GE2.18 ppb
2018-06-20215746GE2.30 ppb
2018-06-20215748GE3.68 ppb
2018-06-20215740GE2.09 ppb
2018-09-14DBP 2005054842.70 ppb
2018-09-14DBP 2005054862.60 ppb
2018-09-14DBP 2005054915.60 ppb
2018-09-14DBP 2005054933.50 ppb
2018-09-14DBP 2005054955.70 ppb
2018-09-14DBP 2005054972.30 ppb
2018-09-14DBP 2005054993.40 ppb
2018-09-17DBP 2005056585.60 ppb
2018-12-14DBP 2005160932.10 ppb
2018-12-14DBP 2005160941.50 ppb
2018-12-14DBP 2005160951.40 ppb
2018-12-14DBP 2005160963.10 ppb
2018-12-14DBP 2005160972.80 ppb
2018-12-14DBP 2005160981.20 ppb
2018-12-14DBP 2005160993.00 ppb
2018-12-14DBP 2005161001.60 ppb
2019-03-14DBP 2005247601.90 ppb
2019-03-14DBP 2005247611.50 ppb
2019-03-14DBP 2005247621.50 ppb
2019-03-14DBP 2005247632.70 ppb
2019-03-14DBP 2005247642.20 ppb
2019-03-14DBP 2005247651.80 ppb
2019-03-14DBP 2005247662.40 ppb
2019-03-14DBP 2005247671.60 ppb
2019-06-20DBP 2005372652.20 ppb
2019-06-20DBP 2005372661.90 ppb
2019-06-20DBP 2005372671.60 ppb
2019-06-20DBP 2005372683.20 ppb
2019-06-20DBP 2005372692.80 ppb
2019-06-20DBP 2005372702.10 ppb
2019-06-20DBP 2005372713.20 ppb
2019-06-20DBP 2005372721.80 ppb
2019-08-15VOC1 2005451212.20 ppb
2019-08-15VOC1 2005451222.10 ppb
2019-09-19DBP 2005496123.50 ppb
2019-09-19DBP 2005496132.20 ppb
2019-09-19DBP 2005496142.40 ppb
2019-09-19DBP 2005496153.40 ppb
2019-09-19DBP 2005496163.00 ppb
2019-09-19DBP 2005496173.60 ppb
2019-09-19DBP 2005496183.10 ppb
2019-09-19DBP 2005496192.70 ppb
2019-12-19DBP 2005609262.30 ppb
2019-12-19DBP 2005609271.80 ppb
2019-12-19DBP 2005609291.40 ppb
2019-12-19DBP 2005609301.90 ppb
2019-12-19DBP 2005609314.20 ppb
2019-12-19DBP 2005609324.60 ppb
2019-12-19DBP 2005609341.70 ppb
2019-12-19DBP 2005609353.80 ppb