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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

City of Concord

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

 

195

Samples

0

Samples exceeding legal limit (MCL)

132

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.19 ppb3223ND - 3.00 ppb
20152.12 ppb3228ND - 4.30 ppb
20161.15 ppb3224ND - 2.30 ppb
20170.722 ppb3217ND - 2.20 ppb
20180.718 ppb3317ND - 2.10 ppb
20191.26 ppb3423ND - 3.20 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
2014-02-198221-021914-B01MND
2014-02-198221-021914-B02MND
2014-02-198221-021914-B03M1.000 ppb
2014-02-198221-021914-B04MND
2014-02-198221-021914-B05MND
2014-02-198221-021914-B06MND
2014-02-198221-021914-B07M1.000 ppb
2014-02-198221-021914-B08MND
2014-05-148221-051414-B01M1.000 ppb
2014-05-148221-051414-B02M2.00 ppb
2014-05-148221-051414-B03M2.00 ppb
2014-05-148221-051414-B04M1.000 ppb
2014-05-148221-051414-B05M1.000 ppb
2014-05-148221-051414-B06M2.00 ppb
2014-05-148221-051414-B07M1.000 ppb
2014-05-148221-051414-B08M2.00 ppb
2014-08-068221-080614-B01M2.00 ppb
2014-08-068221-080614-B02M2.00 ppb
2014-08-068221-080614-B03M3.00 ppb
2014-08-068221-080614-B04M3.00 ppb
2014-08-068221-080614-B05M2.00 ppb
2014-08-068221-080614-B06M2.00 ppb
2014-08-068221-080614-B07M3.00 ppb
2014-08-068221-080614-B08M2.00 ppb
2014-11-128221-111214-B01M1.000 ppb
2014-11-128221-111214-B02M1.000 ppb
2014-11-128221-111214-B03M1.000 ppb
2014-11-128221-111214-B04MND
2014-11-128221-111214-B05MND
2014-11-128221-111214-B06M1.000 ppb
2014-11-128221-111214-B07M1.000 ppb
2014-11-128221-111214-B08MND
2015-02-112.00 ppb
2015-02-112.00 ppb
2015-02-112.00 ppb
2015-02-112.00 ppb
2015-02-112.00 ppb
2015-02-112.00 ppb
2015-02-112.00 ppb
2015-02-113.00 ppb
2015-05-132.00 ppb
2015-05-133.00 ppb
2015-05-133.00 ppb
2015-05-132.00 ppb
2015-05-132.00 ppb
2015-05-133.00 ppb
2015-05-132.00 ppb
2015-05-203.00 ppb
2015-08-123.00 ppb
2015-08-123.20 ppb
2015-08-123.20 ppb
2015-08-122.90 ppb
2015-08-122.50 ppb
2015-08-124.30 ppb
2015-08-123.50 ppb
2015-08-123.20 ppb
2015-11-111.20 ppb
2015-11-11ND
2015-11-11ND
2015-11-111.50 ppb
2015-11-111.10 ppb
2015-11-11ND
2015-11-11ND
2015-11-111.10 ppb
2016-02-093398142ND
2016-02-093398143ND
2016-02-093398144ND
2016-02-093398145ND
2016-02-093398146ND
2016-02-093398147ND
2016-02-093398148ND
2016-02-093398149ND
2016-05-1034458911.40 ppb
2016-05-1034458921.90 ppb
2016-05-1034458931.90 ppb
2016-05-1034458941.60 ppb
2016-05-1034458951.40 ppb
2016-05-1034458961.80 ppb
2016-05-1034458971.10 ppb
2016-05-1034458982.30 ppb
2016-08-0935169641.90 ppb
2016-08-0935169651.60 ppb
2016-08-0935169661.70 ppb
2016-08-0935169671.60 ppb
2016-08-0935169681.30 ppb
2016-08-0935169691.70 ppb
2016-08-0935169701.30 ppb
2016-08-0935169711.70 ppb
2016-11-0835822811.50 ppb
2016-11-0835822821.20 ppb
2016-11-0835822831.30 ppb
2016-11-0835822841.50 ppb
2016-11-0835822851.30 ppb
2016-11-0835822861.000 ppb
2016-11-0835822871.60 ppb
2016-11-0835822881.20 ppb
2017-02-143638203ND
2017-02-143638204ND
2017-02-143638205ND
2017-02-143638206ND
2017-02-143638207ND
2017-02-143638208ND
2017-02-143638209ND
2017-02-143638210ND
2017-05-0936910071.30 ppb
2017-05-093691008ND
2017-05-093691009ND
2017-05-0936910101.40 ppb
2017-05-093691011ND
2017-05-093691012ND
2017-05-093691013ND
2017-05-093691014ND
2017-08-0837516511.70 ppb
2017-08-0837516521.000 ppb
2017-08-083751653ND
2017-08-0837516541.60 ppb
2017-08-0837516551.10 ppb
2017-08-0837516561.10 ppb
2017-08-0837516571.10 ppb
2017-08-0837516581.10 ppb
2017-11-1638230641.50 ppb
2017-11-1638230651.30 ppb
2017-11-1638230661.30 ppb
2017-11-1638230671.10 ppb
2017-11-1638230681.20 ppb
2017-11-1638230691.40 ppb
2017-11-1638230702.20 ppb
2017-11-1638230711.70 ppb
2018-02-133871444 1.40 ppb
2018-02-133871445 1.90 ppb
2018-02-133871446 1.90 ppb
2018-02-133871447 1.10 ppb
2018-02-133871448 ND
2018-02-133871449 1.90 ppb
2018-02-133871450 1.30 ppb
2018-02-133871451 2.10 ppb
2018-05-083931391 1.10 ppb
2018-05-083931392 1.10 ppb
2018-05-083931393 1.20 ppb
2018-05-083931394 ND
2018-05-083931395 ND
2018-05-083931396 1.20 ppb
2018-05-083931397 1.000 ppb
2018-05-083931398 1.30 ppb
2018-05-243946294 1.60 ppb
2018-08-214031486 1.10 ppb
2018-08-214031487 ND
2018-08-214031488 ND
2018-08-214031489 1.20 ppb
2018-08-214031490 ND
2018-08-214031491 ND
2018-08-214031492 ND
2018-08-214031493 1.30 ppb
2018-11-134121274 ND
2018-11-134121276 ND
2018-11-134121278 ND
2018-11-134121353 ND
2018-11-134121355 ND
2018-11-134121357 ND
2018-11-134121359 ND
2018-11-134121361 ND
2019-02-044187564 ND
2019-02-044187620 ND
2019-02-124195480-1 ND
2019-02-124195481-1 1.20 ppb
2019-02-124195482-1 1.20 ppb
2019-02-124195483-1 ND
2019-02-124195484-1 ND
2019-02-124195485-1 1.20 ppb
2019-02-124195486-1 ND
2019-02-124195487-1 1.30 ppb
2019-05-144294422 1.50 ppb
2019-05-144294424 1.20 ppb
2019-05-144294426 1.20 ppb
2019-05-144294428 1.30 ppb
2019-05-144294430 1.40 ppb
2019-05-144294432 1.20 ppb
2019-05-144294434 1.60 ppb
2019-05-144294436 1.20 ppb
2019-08-134385972 1.40 ppb
2019-08-134385974 3.00 ppb
2019-08-134385976 3.00 ppb
2019-08-134385978 1.20 ppb
2019-08-134385980 ND
2019-08-134385982 3.00 ppb
2019-08-134385984 ND
2019-08-134385986 2.90 ppb
2019-11-124483517 1.10 ppb
2019-11-124483519 2.70 ppb
2019-11-124483521 2.90 ppb
2019-11-124483523 ND
2019-11-124483525 ND
2019-11-124483527 3.20 ppb
2019-11-124483529 ND
2019-11-124483531 3.10 ppb