Know Your Environment. Protect Your Health.

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.

 

193

Samples

0

Samples exceeding legal limit (MCL)

192

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201810.3 ppb34345.10 ppb - 19.5 ppb
20198.65 ppb34344.90 ppb - 13.3 ppb
20208.80 ppb35351.30 ppb - 14.2 ppb
20217.30 ppb26263.20 ppb - 12.2 ppb
20227.77 ppb2625ND - 12.5 ppb
20238.62 ppb38381.32 ppb - 15.0 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.06 ppb

The EWG Health Guideline of 0.06 ppb for bromodichloromethane was based on the California Office of Environmental Health Hazard Assessment's public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer and harm to fetal growth and development.

ppb = parts per billion

All test results

Date Lab ID Result
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
2020-02-20VOC1 2005668934.90 ppb
2020-02-20VOC1 2005668923.50 ppb
2020-02-21VOC1 2005669821.30 ppb
2020-03-19DBP 20056997610.3 ppb
2020-03-19DBP 2005699777.00 ppb
2020-03-19DBP 2005699788.10 ppb
2020-03-19DBP 20056997914.2 ppb
2020-03-19DBP 20056998012.0 ppb
2020-03-19DBP 2005699816.70 ppb
2020-03-19DBP 20056998213.0 ppb
2020-03-19DBP 2005699837.80 ppb
2020-06-18DBP 2005797949.80 ppb
2020-06-18DBP 2005797957.70 ppb
2020-06-18DBP 2005797966.00 ppb
2020-06-18DBP 20057979711.2 ppb
2020-06-18DBP 20057979811.0 ppb
2020-06-18DBP 2005797996.30 ppb
2020-06-18DBP 20057980011.5 ppb
2020-06-18DBP 2005798017.20 ppb
2020-09-17DBP 20059066111.9 ppb
2020-09-17DBP 2005906629.10 ppb
2020-09-17DBP 20059066310.8 ppb
2020-09-17DBP 20059066413.1 ppb
2020-09-17DBP 2005906657.60 ppb
2020-09-17DBP 2005906666.50 ppb
2020-09-17DBP 20059066712.6 ppb
2020-09-17DBP 20059066812.8 ppb
2020-12-18DBP 2006015988.80 ppb
2020-12-18DBP 2006015995.00 ppb
2020-12-18DBP 2006016004.40 ppb
2020-12-18DBP 2006016017.80 ppb
2020-12-18DBP 2006016029.80 ppb
2020-12-18DBP 2006016039.70 ppb
2020-12-18DBP 20060160410.5 ppb
2020-12-18DBP 2006016058.00 ppb
2021-01-21VOC1 2006045714.20 ppb
2021-01-21VOC1 2006045703.20 ppb
2021-03-18DBP 2006103167.10 ppb
2021-03-18DBP 2006103174.70 ppb
2021-03-18DBP 2006103183.80 ppb
2021-03-18DBP 2006103197.60 ppb
2021-03-18DBP 20061032012.2 ppb
2021-03-18DBP 2006103216.30 ppb
2021-03-18DBP 2006103229.90 ppb
2021-03-18DBP 2006103233.90 ppb
2021-06-17DBP 2006213418.90 ppb
2021-06-17DBP 2006213426.70 ppb
2021-06-17DBP 2006213439.90 ppb
2021-06-17DBP 20062134410.9 ppb
2021-06-17DBP 2006213455.00 ppb
2021-06-17DBP 2006213465.30 ppb
2021-06-17DBP 2006213479.10 ppb
2021-06-17DBP 2006213488.70 ppb
2021-12-13277826X5.61 ppb
2021-12-142778229.53 ppb
2021-12-14277828X8.80 ppb
2021-12-14277830X7.84 ppb
2021-12-14277832X7.60 ppb
2021-12-14277834X9.93 ppb
2021-12-14277836X8.09 ppb
2021-12-14277824X4.94 ppb
2022-01-202793264.69 ppb
2022-01-20279325ND
2022-06-1428829612.4 ppb
2022-06-1428829812.1 ppb
2022-06-1428830212.5 ppb
2022-06-142883047.95 ppb
2022-06-1528830011.4 ppb
2022-06-1528829010.5 ppb
2022-06-152882927.30 ppb
2022-06-152882946.98 ppb
2022-09-142962898.00 ppb
2022-09-152962911.000 ppb
2022-09-152962939.80 ppb
2022-09-152962959.50 ppb
2022-09-1529629711.9 ppb
2022-09-152962998.69 ppb
2022-09-152963017.90 ppb
2022-09-1529630711.5 ppb
2022-12-133030276.62 ppb
2022-12-133030308.82 ppb
2022-12-133030346.23 ppb
2022-12-133030367.50 ppb
2022-12-133030382.68 ppb
2022-12-143030327.34 ppb
2022-12-153030256.04 ppb
2022-12-153030232.76 ppb
2023-02-093062321.95 ppb
2023-02-093062311.32 ppb
2023-03-063078134.60 ppb
2023-03-073078116.34 ppb
2023-03-073078123.35 ppb
2023-03-073078175.77 ppb
2023-03-073078183.39 ppb
2023-03-073078143.64 ppb
2023-03-073078164.30 ppb
2023-03-083078153.33 ppb
2023-06-06N3F0423-01PPS11.0 ppb
2023-06-06N3F0423-03PPS7.80 ppb
2023-06-06N3F0423-06PPS11.0 ppb
2023-06-06N3F0423-08PPS6.30 ppb
2023-06-06N3F0423-086.30 ppb
2023-06-06N3F0423-0111.0 ppb
2023-06-06N3F0423-037.80 ppb
2023-06-06N3F0423-0611.0 ppb
2023-06-07N3F0423-0712.0 ppb
2023-06-07N3F0423-0411.0 ppb
2023-06-07N3F0423-028.00 ppb
2023-06-08N3F0423-0510.00 ppb
2023-09-12CO9998213.0 ppb
2023-09-12CO9998310.00 ppb
2023-09-12CO999899.20 ppb
2023-09-13CO9998615.0 ppb
2023-09-13CO9998715.0 ppb
2023-09-13CO9998815.0 ppb
2023-09-14CO999848.30 ppb
2023-09-14CO9998514.0 ppb
2023-12-11CP682136.20 ppb
2023-12-12CP6821412.0 ppb
2023-12-12CP6821112.0 ppb
2023-12-12CP682126.60 ppb
2023-12-12CP682169.80 ppb
2023-12-12CP6821713.0 ppb
2023-12-12CP682187.60 ppb
2023-12-13CP682159.80 ppb