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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Conway Water 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

 

194

Samples

0

Samples exceeding legal limit (MCL)

113

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.93 ppb33330.770 ppb - 2.70 ppb
20151.27 ppb3533ND - 2.30 ppb
20160.379 ppb258ND - 1.40 ppb
20170.724 ppb3319ND - 1.50 ppb
20180.258 ppb359ND - 1.40 ppb
20190.345 ppb3311ND - 1.20 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
2014-02-11140440039021.50 ppb
2014-02-11140440034021.10 ppb
2014-02-11140440035021.50 ppb
2014-02-11140440036021.30 ppb
2014-02-11140440037021.10 ppb
2014-02-11140440038021.40 ppb
2014-03-17140790051021.10 ppb
2014-03-17140790052022.10 ppb
2014-04-02140930112010.770 ppb
2014-04-21141140073022.20 ppb
2014-04-21141140077022.40 ppb
2014-04-21141140079021.80 ppb
2014-04-21141140072022.30 ppb
2014-04-21141140075021.60 ppb
2014-04-21141140074022.00 ppb
2014-04-21141140076022.20 ppb
2014-04-21141140078022.20 ppb
2014-07-21142050124022.10 ppb
2014-07-21142050116022.00 ppb
2014-07-21142050120022.00 ppb
2014-07-21142050122022.00 ppb
2014-07-21142050119021.90 ppb
2014-07-21142050123021.80 ppb
2014-07-21142050121022.40 ppb
2014-07-21142050125022.30 ppb
2014-10-20142950013022.30 ppb
2014-10-20142950009022.70 ppb
2014-10-20142950012022.30 ppb
2014-10-20142950010022.50 ppb
2014-10-20142950014022.40 ppb
2014-10-20142950007021.90 ppb
2014-10-20142950011022.10 ppb
2014-10-20142950008022.50 ppb
2015-01-14150150028030.931 ppb
2015-01-21150220058021.30 ppb
2015-01-21150220055021.80 ppb
2015-01-21150220054021.20 ppb
2015-01-21150220056022.00 ppb
2015-01-21150220057021.70 ppb
2015-01-21150220061022.30 ppb
2015-01-21150220059021.50 ppb
2015-01-21150220060021.40 ppb
2015-04-06150990010031.22 ppb
2015-04-06150990010091.10 ppb
2015-04-21151130015021.30 ppb
2015-04-21151130018021.10 ppb
2015-04-21151130021021.50 ppb
2015-04-21151130020021.20 ppb
2015-04-21151130014021.20 ppb
2015-04-21151130016021.50 ppb
2015-04-21151130019021.20 ppb
2015-04-21151130017021.30 ppb
2015-07-29152110053021.000 ppb
2015-07-29152110055021.10 ppb
2015-07-29152110054021.30 ppb
2015-07-29152110051021.20 ppb
2015-07-2915211005202ND
2015-07-29152110049021.30 ppb
2015-07-2915211005602ND
2015-07-29152110050021.10 ppb
2015-10-19152950027021.60 ppb
2015-10-19152950025021.10 ppb
2015-10-19152950029021.10 ppb
2015-10-19152950028021.40 ppb
2015-10-19152950031021.10 ppb
2015-10-19152950032021.70 ppb
2015-10-19152950030021.10 ppb
2015-10-19152950026021.50 ppb
2016-04-05160980008010.680 ppb
2016-04-1816112010501ND
2016-04-1816112010101ND
2016-04-1816112009901ND
2016-04-18161120100011.10 ppb
2016-04-1816112009801ND
2016-04-1816112010201ND
2016-04-1816112010301ND
2016-04-1816112010401ND
2016-07-2116204003502ND
2016-07-2116204003602ND
2016-07-2116204003702ND
2016-07-2116204003302ND
2016-07-2116204003202ND
2016-07-2116204003102ND
2016-07-2116204003002ND
2016-07-2116204003402ND
2016-10-19162940076021.40 ppb
2016-10-19162940077021.20 ppb
2016-10-19162940081021.40 ppb
2016-10-19162940080021.30 ppb
2016-10-1916294007802ND
2016-10-1916294007902ND
2016-10-19162940074021.000 ppb
2016-10-19162940075021.40 ppb
2017-01-1617019005202ND
2017-01-16170190047021.000 ppb
2017-01-16170190046021.10 ppb
2017-01-1617019004502ND
2017-01-1617019004802ND
2017-01-1617019004902ND
2017-01-1617019005002ND
2017-01-1617019005102ND
2017-04-03170950005011.19 ppb
2017-05-1717138002402ND
2017-05-17171380023021.000 ppb
2017-05-1717138002202ND
2017-05-17171380029021.20 ppb
2017-05-1717138002802ND
2017-05-1717138002702ND
2017-05-1717138002602ND
2017-05-1717138002502ND
2017-08-14172290065021.40 ppb
2017-08-14172290062021.40 ppb
2017-08-14172290063021.30 ppb
2017-08-14172290066021.10 ppb
2017-08-14172290067021.40 ppb
2017-08-14172290068021.30 ppb
2017-08-14172290069021.50 ppb
2017-08-14172290064021.50 ppb
2017-11-13173200044021.30 ppb
2017-11-13173200043021.10 ppb
2017-11-1317320004202ND
2017-11-1317320004102ND
2017-11-13173200037021.10 ppb
2017-11-13173200040021.20 ppb
2017-11-13173200039021.40 ppb
2017-11-13173200038021.40 ppb
2018-01-02180040088030.846 ppb
2018-01-1518018000402ND
2018-01-1518018000902ND
2018-01-15180180006021.20 ppb
2018-01-15180180012021.40 ppb
2018-01-15180180007021.000 ppb
2018-01-15180180005021.30 ppb
2018-01-1518018001002ND
2018-01-1518018000802ND
2018-04-02180940006020.549 ppb
2018-04-02180940006090.540 ppb
2018-04-1618109009502ND
2018-04-1618109010002ND
2018-04-1618109010202ND
2018-04-1618109009802ND
2018-04-1618109009602ND
2018-04-1618109009702ND
2018-04-1618109009902ND
2018-04-1618109010102ND
2018-07-1818200005502ND
2018-07-1818200005702ND
2018-07-1818200005802ND
2018-07-1818200005602ND
2018-07-1818200006202ND
2018-07-1818200006102ND
2018-07-1818200006002ND
2018-07-1818200005902ND
2018-10-1518290000502ND
2018-10-1518290000302ND
2018-10-1518290000702ND
2018-10-1518290000802ND
2018-10-1518290000602ND
2018-10-15182900009021.10 ppb
2018-10-15182900004021.10 ppb
2018-10-1518290000202ND
2019-02-1119045002802ND
2019-02-1119045002402ND
2019-02-1119045002302ND
2019-02-1119045002202ND
2019-02-11190450027021.10 ppb
2019-02-11190450021021.000 ppb
2019-02-1119045002602ND
2019-02-1119045002502ND
2019-05-0119122008002ND
2019-05-0119122007302ND
2019-05-0119122007802ND
2019-05-0119122007602ND
2019-05-0119122007402ND
2019-05-0119122007902ND
2019-05-0119122007202ND
2019-05-0119122007502ND
2019-05-01191220077010.590 ppb
2019-08-05192200059021.20 ppb
2019-08-05192200054021.10 ppb
2019-08-0519220005702ND
2019-08-0519220005802ND
2019-08-05192200053021.000 ppb
2019-08-05192200056021.20 ppb
2019-08-05192200055021.20 ppb
2019-08-0519220006002ND
2019-11-18193250038021.000 ppb
2019-11-1819325003302ND
2019-11-1819325003502ND
2019-11-1819325003602ND
2019-11-18193250039021.000 ppb
2019-11-18193250037021.000 ppb
2019-11-1819325003402ND
2019-11-1819325004002ND