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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

Danbury Water Department

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

 

207

Samples

0

Samples exceeding legal limit (MCL)

207

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20149.40 ppb37373.60 ppb - 15.0 ppb
20158.94 ppb34343.20 ppb - 14.0 ppb
20168.96 ppb34343.80 ppb - 13.6 ppb
20179.85 ppb34347.60 ppb - 14.6 ppb
201810.3 ppb34345.10 ppb - 19.5 ppb
20198.65 ppb34344.90 ppb - 13.3 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
2014-02-18E402994-5VOC3.60 ppb
2014-02-18E402994-6VOC4.30 ppb
2014-03-11E403C94-2TTHM7.20 ppb
2014-03-11E403C94-4TTHM9.60 ppb
2014-03-11E403C94-7TTHM8.90 ppb
2014-03-12E403C94-1TTHM9.10 ppb
2014-03-13E403C94-6TTHM3.70 ppb
2014-03-14E403C94-8TTHM5.50 ppb
2014-03-17E403C94-3TTHM5.80 ppb
2014-03-18E403C94-5TTHM6.00 ppb
2014-06-10E406G56-4TTHM13.0 ppb
2014-06-10E406G56-6TTHM9.90 ppb
2014-06-11E406G56-1TTHM12.0 ppb
2014-06-12E406G56-2TTHM10.00 ppb
2014-06-12E406G56-7TTHM12.0 ppb
2014-06-12E406G56-8TTHM8.00 ppb
2014-06-13E406G56-5TTHM11.0 ppb
2014-06-16E406G56-3TTHM7.40 ppb
2014-09-10E409F66-1TTHM12.0 ppb
2014-09-11E409F66-4TTHM14.0 ppb
2014-09-11E409F66-6TTHM11.0 ppb
2014-09-12E409F66-2TTHM11.0 ppb
2014-09-12E409F66-8TTHM10.00 ppb
2014-09-15E409F66-3TTHM10.00 ppb
2014-09-23E409M19-1TTHM15.0 ppb
2014-09-23E409M19-2TTHM13.0 ppb
2014-09-23E409M19-3TTHM14.0 ppb
2014-09-30E409T37-2TTHM15.0 ppb
2014-09-30E410021-1TTHM15.0 ppb
2014-12-12E412D88-1TTHM10.00 ppb
2014-12-12E412D88-7TTHM8.30 ppb
2014-12-12E412D88-8TTHM5.70 ppb
2014-12-15E412D88-2TTHM4.60 ppb
2014-12-15E412D88-3TTHM7.10 ppb
2014-12-15E412D88-4TTHM12.0 ppb
2014-12-15E412D88-6TTHM5.30 ppb
2014-12-16E412D88-5TTHM7.80 ppb
2015-03-12E503B60-5TTHM8.60 ppb
2015-03-12E503B60-2TTHM7.70 ppb
2015-03-13E503B60-4TTHM9.60 ppb
2015-03-13E503B60-1TTHM9.00 ppb
2015-03-13E503B60-6TTHM5.30 ppb
2015-03-16E503B60-3TTHM6.50 ppb
2015-03-25E503J77-1TTHM6.40 ppb
2015-03-26E503J77-2TTHM8.50 ppb
2015-04-21E504H71-2VOC4.30 ppb
2015-04-21E504H71-1VOC3.20 ppb
2015-06-11E506H99-5TTHM8.70 ppb
2015-06-12E506H99-7TTHM11.0 ppb
2015-06-12E506H99-8TTHM5.70 ppb
2015-06-15E506H99-3TTHM6.10 ppb
2015-06-15E506H99-2TTHM7.00 ppb
2015-06-15E506H99-1TTHM10.00 ppb
2015-06-15E506H99-4TTHM10.00 ppb
2015-06-16E506H99-6TTHM8.10 ppb
2015-09-18E509O88-6TTHM14.0 ppb
2015-09-18E509O88-8TTHM11.0 ppb
2015-09-21E509O88-3TTHM10.00 ppb
2015-09-21E509O88-1TTHM14.0 ppb
2015-09-21E509O88-2TTHM12.0 ppb
2015-09-22E509O88-5TTHM14.0 ppb
2015-09-29E509W38-1TTHM14.0 ppb
2015-09-29E509W38-2TTHM13.0 ppb
2015-12-17E512K74-4-18TTHM9.00 ppb
2015-12-17E512K74-5-19TTHM10.00 ppb
2015-12-17E512K74-7-15TTHM14.0 ppb
2015-12-17E512K74-1-16TTHM8.50 ppb
2015-12-17E512K74-2-17TTHM4.80 ppb
2015-12-18E512K74-8-04TTHM6.40 ppb
2015-12-18E512K74-6-20TTHM6.40 ppb
2015-12-21E512K74-3-03TTHM7.00 ppb
2016-03-09E603E03-1-16TTHM10.00 ppb
2016-03-09E603E03-4-18TTHM9.80 ppb
2016-03-10E603E03-5-19TTHM7.80 ppb
2016-03-10E603E03-6-20TTHM7.00 ppb
2016-03-10E603E03-7-15TTHM9.60 ppb
2016-03-10E603E03-2-17TTHM5.10 ppb
2016-03-11E603E03-8-04TTHM6.40 ppb
2016-03-14E603E03-3-03TTHM7.20 ppb
2016-04-19E604J01-5VOC4.70 ppb
2016-04-19E604J01-6VOC3.80 ppb
2016-06-16E606O13-1-16TTHM11.0 ppb
2016-06-16E606O13-2-17TTHM8.20 ppb
2016-06-16E606O13-4-18TTHM11.0 ppb
2016-06-16E606O13-5-19TTHM8.70 ppb
2016-06-16E606O13-6-20TTHM9.70 ppb
2016-06-16E606O13-8-04TTHM8.20 ppb
2016-06-20E606O13-7-15TTHM11.0 ppb
2016-06-20E606O13-3-03TTHM7.40 ppb
2016-09-08188687CH11.2 ppb
2016-09-09188691CH8.77 ppb
2016-09-13188689CH13.6 ppb
2016-09-13188677CH8.52 ppb
2016-09-13188679CH8.67 ppb
2016-09-13188681CH8.28 ppb
2016-09-13188683CH10.1 ppb
2016-09-14188685CH12.7 ppb
2016-12-12192764CH9.21 ppb
2016-12-13192766CH11.8 ppb
2016-12-13192768CH9.55 ppb
2016-12-13192760CH8.56 ppb
2016-12-13192762CH9.04 ppb
2016-12-13192754CH9.92 ppb
2016-12-13192756CH8.85 ppb
2016-12-14192758CH9.27 ppb
2017-02-15194887GE7.60 ppb
2017-02-15194886GE10.00 ppb
2017-03-09196065GE8.48 ppb
2017-03-09196059GE10.6 ppb
2017-03-09196061GE10.1 ppb
2017-03-13196063GE10.2 ppb
2017-03-14196069GE9.69 ppb
2017-03-15196071GE8.93 ppb
2017-03-15196073GE10.1 ppb
2017-03-15196067GE8.39 ppb
2017-06-13200345GE9.30 ppb
2017-06-13200351GE9.92 ppb
2017-06-14200349GE9.40 ppb
2017-06-14200341GE7.87 ppb
2017-06-14200339GE8.76 ppb
2017-06-15200343GE8.06 ppb
2017-06-15200347GE8.49 ppb
2017-06-15200353GE9.19 ppb
2017-09-12204472GE11.7 ppb
2017-09-12204474GE11.3 ppb
2017-09-12204478GE12.0 ppb
2017-09-12204484GE14.6 ppb
2017-09-12204486GE11.8 ppb
2017-09-13204480GE12.4 ppb
2017-09-13204482GE12.2 ppb
2017-09-13204476GE11.5 ppb
2017-12-11208503GE10.2 ppb
2017-12-11208505GE8.25 ppb
2017-12-12208507GE7.94 ppb
2017-12-12208509GE10.4 ppb
2017-12-12208511GE8.92 ppb
2017-12-12208513GE9.39 ppb
2017-12-12208501GE8.80 ppb
2017-12-12208499GE8.33 ppb
2018-02-21210745GE6.49 ppb
2018-02-21210744GE7.83 ppb
2018-03-14211584GE8.88 ppb
2018-03-14211586GE8.46 ppb
2018-03-14211588GE8.75 ppb
2018-03-14211590GE9.02 ppb
2018-03-14211598GE9.42 ppb
2018-03-15211592GE9.78 ppb
2018-03-15211594GE8.88 ppb
2018-03-15211596GE9.48 ppb
2018-06-19215736GE9.23 ppb
2018-06-19215738GE9.48 ppb
2018-06-19215742GE10.8 ppb
2018-06-19215744GE10.8 ppb
2018-06-19215750GE9.80 ppb
2018-06-20215746GE10.7 ppb
2018-06-20215748GE11.7 ppb
2018-06-20215740GE9.99 ppb
2018-09-14DBP 2005054849.70 ppb
2018-09-14DBP 20050548610.5 ppb
2018-09-14DBP 20050549117.4 ppb
2018-09-14DBP 20050549315.7 ppb
2018-09-14DBP 20050549519.5 ppb
2018-09-14DBP 20050549711.8 ppb
2018-09-14DBP 20050549914.9 ppb
2018-09-17DBP 20050565818.7 ppb
2018-12-14DBP 2005160939.60 ppb
2018-12-14DBP 2005160945.10 ppb
2018-12-14DBP 2005160956.10 ppb
2018-12-14DBP 2005160968.80 ppb
2018-12-14DBP 2005160979.90 ppb
2018-12-14DBP 2005160985.30 ppb
2018-12-14DBP 20051609910.5 ppb
2018-12-14DBP 2005161008.10 ppb
2019-03-14DBP 20052476010.00 ppb
2019-03-14DBP 2005247615.50 ppb
2019-03-14DBP 2005247627.40 ppb
2019-03-14DBP 2005247639.40 ppb
2019-03-14DBP 2005247646.40 ppb
2019-03-14DBP 2005247657.70 ppb
2019-03-14DBP 2005247668.30 ppb
2019-03-14DBP 2005247676.10 ppb
2019-06-20DBP 20053726510.2 ppb
2019-06-20DBP 2005372666.60 ppb
2019-06-20DBP 2005372676.00 ppb
2019-06-20DBP 20053726811.1 ppb
2019-06-20DBP 20053726910.3 ppb
2019-06-20DBP 2005372709.90 ppb
2019-06-20DBP 20053727112.3 ppb
2019-06-20DBP 2005372727.90 ppb
2019-08-15VOC1 2005451218.50 ppb
2019-08-15VOC1 2005451229.20 ppb
2019-09-19DBP 2005496129.70 ppb
2019-09-19DBP 2005496136.00 ppb
2019-09-19DBP 2005496147.00 ppb
2019-09-19DBP 2005496159.10 ppb
2019-09-19DBP 20054961610.6 ppb
2019-09-19DBP 20054961713.3 ppb
2019-09-19DBP 20054961811.2 ppb
2019-09-19DBP 2005496199.80 ppb
2019-12-19DBP 2005609269.70 ppb
2019-12-19DBP 2005609275.30 ppb
2019-12-19DBP 2005609294.90 ppb
2019-12-19DBP 2005609307.50 ppb
2019-12-19DBP 20056093110.7 ppb
2019-12-19DBP 20056093210.7 ppb
2019-12-19DBP 2005609346.20 ppb
2019-12-19DBP 2005609359.70 ppb