Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Dibromochloromethane

Hope Water Light Comm.

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

 

157

Samples

0

Samples exceeding legal limit (MCL)

132

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20144.04 ppb34340.0167 ppb - 11.5 ppb
20155.74 ppb2120ND - 11.8 ppb
20163.38 ppb2620ND - 13.2 ppb
20172.76 ppb3029ND - 7.00 ppb
20185.14 ppb2220ND - 12.1 ppb
20193.12 ppb2420ND - 7.40 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
2014-01-07140100041024.00 ppb
2014-01-07140100038026.40 ppb
2014-01-07140100039025.70 ppb
2014-01-07140100037026.50 ppb
2014-03-11140720100033.80 ppb
2014-03-11140720099030.0181 ppb
2014-03-11140720098031.13 ppb
2014-03-11140720103030.0420 ppb
2014-03-11140720101030.290 ppb
2014-03-11140720102030.0272 ppb
2014-04-011409400120211.5 ppb
2014-04-01140940013026.60 ppb
2014-04-01140940009026.00 ppb
2014-04-01140940010023.40 ppb
2014-05-21141420089024.30 ppb
2014-05-21141420085021.40 ppb
2014-05-21141420087024.10 ppb
2014-05-21141420086024.70 ppb
2014-05-21141420095023.81 ppb
2014-05-21141420098030.0603 ppb
2014-05-21141420088021.10 ppb
2014-05-21141420094020.0167 ppb
2014-05-21141420097030.0451 ppb
2014-05-21141420096020.207 ppb
2014-07-02141840137027.90 ppb
2014-07-02141840136029.80 ppb
2014-07-02141840139024.70 ppb
2014-07-02141840135021.90 ppb
2014-08-19142330090012.64 ppb
2014-10-01142760005029.10 ppb
2014-10-01142760008029.30 ppb
2014-10-01142760009024.40 ppb
2014-10-01142760006029.30 ppb
2014-10-29143030027013.07 ppb
2015-01-05150080019028.20 ppb
2015-01-05150080020028.50 ppb
2015-01-05150080022024.80 ppb
2015-01-05150080023027.10 ppb
2015-03-02150650005032.09 ppb
2015-04-061510000100211.8 ppb
2015-04-06151000013025.00 ppb
2015-04-061510000090210.3 ppb
2015-04-06151000012027.30 ppb
2015-04-06151000001031.72 ppb
2015-07-0815190002101ND
2015-07-08151900035028.40 ppb
2015-07-08151900033023.40 ppb
2015-07-08151900036027.30 ppb
2015-07-08151900032023.30 ppb
2015-10-05152820003024.40 ppb
2015-10-05152820004026.00 ppb
2015-10-05152820006026.50 ppb
2015-10-05152820005028.90 ppb
2015-10-08152820056014.85 ppb
2015-10-20152960004010.620 ppb
2016-01-06160080103023.10 ppb
2016-01-06160080102021.90 ppb
2016-01-06160080101021.80 ppb
2016-01-061600801000213.2 ppb
2016-01-26160280013030.0306 ppb
2016-02-09160420007030.0290 ppb
2016-04-04160980116023.20 ppb
2016-04-04160980115023.10 ppb
2016-04-04160980114021.90 ppb
2016-04-04160980113028.30 ppb
2016-04-04160980117030.0344 ppb
2016-07-05161890104025.10 ppb
2016-07-05161890105022.50 ppb
2016-07-05161890106025.20 ppb
2016-07-05161890107024.70 ppb
2016-07-0516189010801ND
2016-07-0516189010901ND
2016-07-0516189011001ND
2016-07-0516189011101ND
2016-07-0516189011201ND
2016-07-0516189011301ND
2016-10-05162800093026.90 ppb
2016-10-051628000940211.1 ppb
2016-10-05162800095024.10 ppb
2016-10-05162800092026.50 ppb
2016-10-05162800089015.29 ppb
2017-01-04170050050030.705 ppb
2017-01-04170050049031.15 ppb
2017-01-04170050048025.30 ppb
2017-01-04170050047023.50 ppb
2017-01-04170050046024.30 ppb
2017-01-04170050045027.00 ppb
2017-01-04170050053031.27 ppb
2017-01-04170050051030.924 ppb
2017-01-04170050052034.37 ppb
2017-01-04170050054033.23 ppb
2017-04-05170960092022.40 ppb
2017-04-05170960093023.70 ppb
2017-04-05170960094024.60 ppb
2017-04-05170960095024.10 ppb
2017-05-09171300087030.0375 ppb
2017-05-09171300082031.30 ppb
2017-05-09171300086030.0292 ppb
2017-05-09171300084030.123 ppb
2017-05-09171300085030.372 ppb
2017-05-09171300083030.404 ppb
2017-07-05171870036025.10 ppb
2017-07-05171870035024.00 ppb
2017-07-05171870037023.30 ppb
2017-07-05171870038024.30 ppb
2017-07-1817200003901ND
2017-10-03172780021013.00 ppb
2017-10-04172780039024.00 ppb
2017-10-04172780036023.90 ppb
2017-10-04172780038021.80 ppb
2017-10-04172780037024.70 ppb
2018-01-03180040064023.30 ppb
2018-01-03180040067026.80 ppb
2018-01-03180040065023.20 ppb
2018-01-03180040066021.40 ppb
2018-02-20180530032036.11 ppb
2018-04-04180950086021.67 ppb
2018-04-04180950092025.20 ppb
2018-04-04180950090027.60 ppb
2018-04-04180950089022.20 ppb
2018-04-04180950091023.50 ppb
2018-07-03181860063035.16 ppb
2018-07-03181860060024.70 ppb
2018-07-03181860059026.80 ppb
2018-07-031818600580210.6 ppb
2018-07-03181860057028.00 ppb
2018-07-2418207000701ND
2018-10-03182770063026.40 ppb
2018-10-031827700640212.1 ppb
2018-10-03182770065024.90 ppb
2018-10-03182770066025.00 ppb
2018-10-03182770062018.37 ppb
2018-12-0418340005501ND
2019-01-09190100090024.20 ppb
2019-01-09190100093023.80 ppb
2019-01-09190100092022.10 ppb
2019-01-09190100091023.40 ppb
2019-02-06190380041032.46 ppb
2019-04-02190940043026.90 ppb
2019-04-02190940040021.80 ppb
2019-04-02190940041022.00 ppb
2019-04-02190940042025.60 ppb
2019-07-09191910036022.60 ppb
2019-07-09191910035021.90 ppb
2019-07-09191910038026.00 ppb
2019-07-09191910037026.80 ppb
2019-08-05192200029010.660 ppb
2019-08-0519220002601ND
2019-08-0519220002701ND
2019-08-05192200023011.18 ppb
2019-08-0519220002801ND
2019-08-0519220002501ND
2019-10-02192760039024.80 ppb
2019-10-02192760037022.80 ppb
2019-10-02192760036025.60 ppb
2019-10-02192760038027.40 ppb
2019-10-29193040007012.95 ppb