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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

City of Pasadena

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

 

238

Samples

0

Samples exceeding legal limit (MCL)

230

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20147.89 ppb3735ND - 16.9 ppb
20157.09 ppb3735ND - 13.5 ppb
20165.24 ppb4039ND - 12.3 ppb
20177.39 ppb4443ND - 17.0 ppb
20187.04 ppb4140ND - 34.0 ppb
20198.53 ppb3938ND - 30.0 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
2014-03-06AC460000.800 ppb
2014-03-06AC459881.30 ppb
2014-03-06AC459697.20 ppb
2014-03-06AC459488.50 ppb
2014-03-06AC459458.60 ppb
2014-03-06AC459449.70 ppb
2014-03-06AC459478.60 ppb
2014-03-06AC459467.80 ppb
2014-03-06AC4594910.3 ppb
2014-03-06AC459508.00 ppb
2014-04-24AC517225.10 ppb
2014-04-24AC51724ND
2014-04-24AC517280.600 ppb
2014-04-24AC516939.80 ppb
2014-04-24AC516889.80 ppb
2014-04-24AC516868.40 ppb
2014-04-24AC516909.90 ppb
2014-04-24AC517148.60 ppb
2014-04-24AC516929.20 ppb
2014-04-24AC516919.50 ppb
2014-04-24AC516879.60 ppb
2014-08-21AC649872.00 ppb
2014-08-21AC6501816.9 ppb
2014-08-21AC6499013.6 ppb
2014-08-21AC6499512.9 ppb
2014-08-21AC6499915.1 ppb
2014-08-21AC6499411.9 ppb
2014-08-21AC649881.20 ppb
2014-08-21AC6499712.4 ppb
2014-11-25AC730472.50 ppb
2014-11-25AC7303615.1 ppb
2014-11-25AC730595.60 ppb
2014-11-25AC730769.30 ppb
2014-11-25AC730609.50 ppb
2014-11-25AC730577.20 ppb
2014-11-25AC73062ND
2014-11-25AC730535.50 ppb
2015-01-14AC762036.80 ppb
2015-01-14AC762670.900 ppb
2015-01-14AC762291.20 ppb
2015-01-14AC762655.80 ppb
2015-01-14AC762730.500 ppb
2015-01-14AC761801.50 ppb
2015-01-14AC761787.70 ppb
2015-01-14AC761993.00 ppb
2015-01-14AC761777.20 ppb
2015-01-14AC761987.30 ppb
2015-01-14AC761767.20 ppb
2015-01-14AC76188ND
2015-01-14AC761877.00 ppb
2015-05-27AC937381.10 ppb
2015-05-27AC937669.10 ppb
2015-05-27AC937657.20 ppb
2015-05-27AC937649.60 ppb
2015-05-27AC937337.90 ppb
2015-05-27AC937688.40 ppb
2015-05-27AC93740ND
2015-05-27AC937363.50 ppb
2015-07-22AD005937.90 ppb
2015-07-22AD005897.90 ppb
2015-07-22AD005849.20 ppb
2015-07-22AD005958.20 ppb
2015-07-22AD0058610.7 ppb
2015-07-22AD005907.70 ppb
2015-07-22AD005914.50 ppb
2015-07-22AD005947.50 ppb
2015-10-06AD0958211.6 ppb
2015-10-06AD0958711.1 ppb
2015-10-06AD0957512.8 ppb
2015-10-06AD0958811.7 ppb
2015-10-06AD0957411.1 ppb
2015-10-06AD0958411.3 ppb
2015-10-06AD0958313.5 ppb
2015-10-06AD0957612.6 ppb
2016-01-11AD173521.20 ppb
2016-01-11AD17360ND
2016-01-11AD173642.80 ppb
2016-01-11AD172872.60 ppb
2016-01-11AD172893.70 ppb
2016-01-11AD172812.50 ppb
2016-01-11AD172843.70 ppb
2016-01-11AD173064.60 ppb
2016-01-11AD173026.00 ppb
2016-01-11AD172882.80 ppb
2016-01-11AD172803.40 ppb
2016-04-06AD320831.40 ppb
2016-04-06AD320851.50 ppb
2016-04-06AD320476.40 ppb
2016-04-06AD320466.20 ppb
2016-04-06AD320447.50 ppb
2016-04-06AD320174.50 ppb
2016-04-06AD320375.40 ppb
2016-04-06AD320344.60 ppb
2016-04-06AD320455.70 ppb
2016-04-06AD320365.50 ppb
2016-06-17AD411691.10 ppb
2016-07-06AD431773.60 ppb
2016-07-06AD430957.20 ppb
2016-07-06AD431336.60 ppb
2016-07-06AD431347.60 ppb
2016-07-06AD430997.40 ppb
2016-07-06AD431006.70 ppb
2016-07-06AD431254.70 ppb
2016-07-06AD430988.00 ppb
2016-07-06AD430967.60 ppb
2016-10-06AD526922.70 ppb
2016-10-06AD526696.70 ppb
2016-10-06AD526645.40 ppb
2016-10-06AD526667.00 ppb
2016-10-06AD526707.60 ppb
2016-10-06AD5267211.6 ppb
2016-10-06AD5266312.3 ppb
2016-10-06AD526656.90 ppb
2016-10-06AD526687.00 ppb
2017-01-10AD639985.00 ppb
2017-01-10AD639505.20 ppb
2017-01-10AD639464.90 ppb
2017-01-10AD639455.40 ppb
2017-01-10AD639495.80 ppb
2017-01-10AD639707.40 ppb
2017-01-10AD639485.00 ppb
2017-01-10AD639685.90 ppb
2017-01-10AD639535.80 ppb
2017-03-16AD754522.80 ppb
2017-03-16AD754503.40 ppb
2017-03-16AD754541.10 ppb
2017-03-16AD754682.20 ppb
2017-03-16AD754623.30 ppb
2017-03-16AD75466ND
2017-03-16AD754481.80 ppb
2017-04-04AD782852.20 ppb
2017-04-04AD782538.30 ppb
2017-04-04AD782599.20 ppb
2017-04-04AD782609.20 ppb
2017-04-04AD782618.90 ppb
2017-04-04AD782549.40 ppb
2017-04-04AD782578.60 ppb
2017-04-04AD782569.80 ppb
2017-04-04AD782588.50 ppb
2017-07-11AD889352.00 ppb
2017-07-11AD8888016.1 ppb
2017-07-11AD8887914.2 ppb
2017-07-11AD8887817.0 ppb
2017-07-11AD8887616.7 ppb
2017-07-11AD888479.30 ppb
2017-07-11AD888625.40 ppb
2017-07-11AD8884416.2 ppb
2017-07-11AD8888116.1 ppb
2017-09-18AD965438.20 ppb
2017-10-31AE029814.00 ppb
2017-10-31AE028827.60 ppb
2017-10-31AE028847.20 ppb
2017-10-31AE028777.20 ppb
2017-10-31AE028787.70 ppb
2017-10-31AE028768.50 ppb
2017-10-31AE028807.60 ppb
2017-10-31AE028817.60 ppb
2017-10-31AE028837.50 ppb
2018-02-06AE125345.50 ppb
2018-02-06AE125322.70 ppb
2018-02-06AE124577.20 ppb
2018-02-06AE124597.30 ppb
2018-02-06AE124607.20 ppb
2018-02-06AE124537.50 ppb
2018-02-06AE124587.40 ppb
2018-02-06AE124526.90 ppb
2018-02-06AE124507.30 ppb
2018-02-06AE124518.80 ppb
2018-05-02AE248452.50 ppb
2018-05-02AE248551.60 ppb
2018-05-02AE248471.70 ppb
2018-05-02AE2485134.0 ppb
2018-05-02AE248086.60 ppb
2018-05-02AE247977.10 ppb
2018-05-02AE248026.40 ppb
2018-05-02AE247956.70 ppb
2018-05-02AE2480710.9 ppb
2018-05-02AE248046.60 ppb
2018-05-02AE248036.70 ppb
2018-05-02AE247966.80 ppb
2018-06-26AE314811.10 ppb
2018-06-26AE31497ND
2018-07-30AE3486410.4 ppb
2018-07-30AE348749.40 ppb
2018-07-30AE3487510.00 ppb
2018-07-30AE3487010.2 ppb
2018-07-30AE3487610.2 ppb
2018-07-30AE348659.60 ppb
2018-07-30AE348679.10 ppb
2018-07-30AE3487110.3 ppb
2018-11-14AE461074.40 ppb
2018-11-14AE460575.20 ppb
2018-11-14AE460414.50 ppb
2018-11-14AE460735.10 ppb
2018-11-14AE460564.20 ppb
2018-11-14AE460725.10 ppb
2018-11-14AE460714.60 ppb
2018-11-14AE460745.00 ppb
2018-11-14AE460704.90 ppb
2019-01-30AE522104.10 ppb
2019-01-30AE52244ND
2019-01-30AE521803.60 ppb
2019-01-30AE521784.40 ppb
2019-01-30AE5218515.9 ppb
2019-01-30AE521844.30 ppb
2019-01-30AE521924.60 ppb
2019-01-30AE521824.20 ppb
2019-01-30AE521834.10 ppb
2019-01-30AE521814.10 ppb
2019-03-06AE574072.00 ppb
2019-03-06AE574111.90 ppb
2019-03-06AE5740930.0 ppb
2019-04-23AE6333710.1 ppb
2019-04-23AE633677.70 ppb
2019-04-23AE633648.80 ppb
2019-04-23AE6334010.9 ppb
2019-04-23AE6333910.9 ppb
2019-04-23AE633389.90 ppb
2019-04-23AE6333610.4 ppb
2019-04-23AE633658.20 ppb
2019-08-06AE772472.30 ppb
2019-08-06AE771808.20 ppb
2019-08-06AE7717711.3 ppb
2019-08-06AE7717911.5 ppb
2019-08-06AE771767.50 ppb
2019-08-06AE7718412.2 ppb
2019-08-06AE7717811.3 ppb
2019-08-06AE7718311.6 ppb
2019-08-06AE7718112.1 ppb
2019-08-06AE772651.000 ppb
2019-10-21AE8704511.1 ppb
2019-10-21AE8704410.9 ppb
2019-10-21AE870419.10 ppb
2019-10-21AE8704711.4 ppb
2019-10-21AE8704610.8 ppb
2019-10-21AE8704810.1 ppb
2019-10-21AE870439.30 ppb
2019-10-21AE8704210.8 ppb