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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

City of Galveston

Bromoform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromoform 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

 

192

Samples

0

Samples exceeding legal limit (MCL)

183

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20147.82 ppb32322.70 ppb - 13.0 ppb
20153.19 ppb3223ND - 9.20 ppb
20163.98 ppb32321.60 ppb - 6.30 ppb
20176.71 ppb32322.80 ppb - 14.7 ppb
201811.8 ppb32324.00 ppb - 30.4 ppb
20196.78 ppb32321.50 ppb - 13.1 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.5 ppb

The EWG Health Guideline of 0.5 ppb for bromoform 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
2014-03-20AC478944.10 ppb
2014-03-20AC478934.10 ppb
2014-03-20AC478892.70 ppb
2014-03-20AC478924.20 ppb
2014-03-20AC478993.10 ppb
2014-03-20AC478714.80 ppb
2014-03-20AC478914.70 ppb
2014-03-20AC478984.60 ppb
2014-06-04AC560287.70 ppb
2014-06-04AC5599511.6 ppb
2014-06-04AC5602911.1 ppb
2014-06-04AC560408.50 ppb
2014-06-04AC5599410.7 ppb
2014-06-04AC5600810.6 ppb
2014-06-04AC5603010.00 ppb
2014-06-04AC560319.10 ppb
2014-09-05AC661265.90 ppb
2014-09-05AC661624.40 ppb
2014-09-05AC661214.90 ppb
2014-09-05AC661485.10 ppb
2014-09-05AC661473.30 ppb
2014-09-05AC661275.60 ppb
2014-09-05AC661455.10 ppb
2014-09-05AC661545.10 ppb
2014-12-03AC7351712.3 ppb
2014-12-03AC7355611.9 ppb
2014-12-03AC7351912.1 ppb
2014-12-03AC7352612.6 ppb
2014-12-03AC7352112.1 ppb
2014-12-03AC7355712.9 ppb
2014-12-03AC7352213.0 ppb
2014-12-03AC7352012.4 ppb
2015-02-27AC822991.50 ppb
2015-02-27AC823071.50 ppb
2015-02-27AC823031.40 ppb
2015-02-27AC822981.50 ppb
2015-02-27AC82328ND
2015-02-27AC822961.30 ppb
2015-02-27AC82293ND
2015-02-27AC822971.50 ppb
2015-04-08AC87690ND
2015-04-08AC87688ND
2015-04-08AC876851.10 ppb
2015-04-08AC87681ND
2015-04-08AC87689ND
2015-04-08AC87684ND
2015-04-08AC87682ND
2015-04-08AC87691ND
2015-07-21AD003884.80 ppb
2015-07-21AD003895.20 ppb
2015-07-21AD003692.40 ppb
2015-07-21AD003866.50 ppb
2015-07-21AD003872.40 ppb
2015-07-21AD003573.90 ppb
2015-07-21AD003602.80 ppb
2015-07-21AD003594.20 ppb
2015-10-20AD111607.50 ppb
2015-10-20AD111747.70 ppb
2015-10-20AD111755.80 ppb
2015-10-20AD111797.10 ppb
2015-10-20AD111646.00 ppb
2015-10-20AD111659.20 ppb
2015-10-20AD111738.90 ppb
2015-10-20AD111777.80 ppb
2016-03-10AD281915.00 ppb
2016-03-10AD281695.10 ppb
2016-03-10AD281905.00 ppb
2016-03-10AD281723.80 ppb
2016-03-10AD281873.60 ppb
2016-03-10AD281714.50 ppb
2016-03-10AD281684.30 ppb
2016-03-10AD281884.80 ppb
2016-06-02AD391392.00 ppb
2016-06-02AD391462.00 ppb
2016-06-02AD391492.60 ppb
2016-06-02AD391291.60 ppb
2016-06-02AD391302.40 ppb
2016-06-02AD391442.30 ppb
2016-06-02AD391502.50 ppb
2016-06-02AD391512.10 ppb
2016-09-29AD519613.90 ppb
2016-09-29AD519405.30 ppb
2016-09-29AD519524.00 ppb
2016-09-29AD519344.30 ppb
2016-09-29AD519633.20 ppb
2016-09-29AD519435.20 ppb
2016-09-29AD519514.00 ppb
2016-09-29AD519594.40 ppb
2016-10-04AD524426.20 ppb
2016-10-04AD524434.50 ppb
2016-10-04AD524404.00 ppb
2016-10-04AD524444.10 ppb
2016-10-04AD524416.30 ppb
2016-10-04AD524376.00 ppb
2016-10-04AD524453.70 ppb
2016-10-04AD524384.60 ppb
2017-02-21AD712345.10 ppb
2017-02-21AD712334.40 ppb
2017-02-21AD712355.80 ppb
2017-02-21AD712364.40 ppb
2017-02-21AD712374.60 ppb
2017-02-21AD712384.20 ppb
2017-02-21AD712394.50 ppb
2017-02-21AD712703.60 ppb
2017-05-09AD833055.60 ppb
2017-05-09AD833003.90 ppb
2017-05-09AD8330710.1 ppb
2017-05-09AD833085.50 ppb
2017-05-09AD833106.10 ppb
2017-05-09AD833014.50 ppb
2017-05-09AD832896.80 ppb
2017-05-09AD833044.60 ppb
2017-08-08AD9239313.7 ppb
2017-08-08AD9240112.0 ppb
2017-08-08AD9239714.7 ppb
2017-08-08AD9239810.7 ppb
2017-08-08AD9239510.9 ppb
2017-08-08AD9239911.9 ppb
2017-08-08AD9239611.1 ppb
2017-08-08AD9240011.9 ppb
2017-10-11AE005584.70 ppb
2017-10-11AE005653.20 ppb
2017-10-11AE005577.30 ppb
2017-10-11AE005594.50 ppb
2017-10-11AE005602.80 ppb
2017-10-11AE005623.70 ppb
2017-10-11AE005633.90 ppb
2017-10-11AE005613.90 ppb
2018-01-31AE114935.20 ppb
2018-01-31AE115035.60 ppb
2018-01-31AE114914.80 ppb
2018-01-31AE114964.80 ppb
2018-01-31AE115024.70 ppb
2018-01-31AE114984.90 ppb
2018-01-31AE114854.00 ppb
2018-01-31AE115045.00 ppb
2018-06-14AE3000110.9 ppb
2018-06-14AE3000310.4 ppb
2018-06-14AE2999311.4 ppb
2018-06-14AE300099.90 ppb
2018-06-14AE299869.40 ppb
2018-06-14AE3000710.4 ppb
2018-06-14AE3000610.9 ppb
2018-06-14AE299879.60 ppb
2018-08-08AE3611011.7 ppb
2018-08-08AE3608413.3 ppb
2018-08-08AE3607611.5 ppb
2018-08-08AE3607811.3 ppb
2018-08-08AE361059.70 ppb
2018-08-08AE3610612.0 ppb
2018-08-08AE3609913.0 ppb
2018-08-08AE3610411.6 ppb
2018-10-02AE4252922.7 ppb
2018-10-02AE4253015.3 ppb
2018-10-02AE4253130.4 ppb
2018-10-02AE4253214.8 ppb
2018-10-02AE4253328.0 ppb
2018-10-02AE4253416.6 ppb
2018-10-02AE4253517.8 ppb
2018-10-02AE4253616.5 ppb
2019-01-15AE498132.50 ppb
2019-01-15AE498122.00 ppb
2019-01-15AE498113.70 ppb
2019-01-15AE498101.50 ppb
2019-01-15AE498093.00 ppb
2019-01-15AE498082.00 ppb
2019-01-15AE498072.20 ppb
2019-01-15AE498062.00 ppb
2019-05-09AE656694.90 ppb
2019-05-09AE656736.20 ppb
2019-05-09AE656714.40 ppb
2019-05-09AE656744.30 ppb
2019-05-09AE656724.10 ppb
2019-05-09AE656756.20 ppb
2019-05-09AE656705.20 ppb
2019-05-09AE656684.70 ppb
2019-07-24AE757698.80 ppb
2019-07-24AE7576113.1 ppb
2019-07-24AE7574610.3 ppb
2019-07-24AE757409.00 ppb
2019-07-24AE7576710.9 ppb
2019-07-24AE7574110.8 ppb
2019-07-24AE7576210.9 ppb
2019-07-24AE7576811.6 ppb
2019-11-20AE901496.80 ppb
2019-11-20AE9016610.6 ppb
2019-11-20AE901486.80 ppb
2019-11-20AE901479.70 ppb
2019-11-20AE9016510.1 ppb
2019-11-20AE9015210.3 ppb
2019-11-20AE901508.70 ppb
2019-11-20AE901519.50 ppb