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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Allouez Waterworks

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

 

98

Samples

0

Samples exceeding legal limit (MCL)

10

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.268 ppb1814ND - 0.730 ppb
20150.394 ppb1615ND - 0.730 ppb
20160.155 ppb167ND - 0.550 ppb
20170.161 ppb168ND - 0.640 ppb
20180.0850 ppb163ND - 0.550 ppb
20190.119 ppb167ND - 0.520 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
2014-01-097657530.210 ppb
2014-01-097657560.260 ppb
2014-01-097657550.260 ppb
2014-01-097657540.730 ppb
2014-04-08778725ND
2014-04-087787220.210 ppb
2014-04-087787230.390 ppb
2014-04-08778724ND
2014-07-078012040.450 ppb
2014-07-078012060.290 ppb
2014-07-078012050.410 ppb
2014-07-078012030.420 ppb
2014-07-15803040ND
2014-07-15803016ND
2014-10-078239520.250 ppb
2014-10-078239530.530 ppb
2014-10-078239540.240 ppb
2014-10-078239550.180 ppb
2015-01-078380930.310 ppb
2015-01-078380950.320 ppb
2015-01-078380940.730 ppb
2015-01-078380960.380 ppb
2015-04-078523650.360 ppb
2015-04-078523660.510 ppb
2015-04-078523680.360 ppb
2015-04-078523670.330 ppb
2015-07-07869349ND
2015-07-078693470.280 ppb
2015-07-078693480.290 ppb
2015-07-078693500.460 ppb
2015-10-068875550.420 ppb
2015-10-068875570.460 ppb
2015-10-068875580.490 ppb
2015-10-068875560.600 ppb
2016-01-12901114ND
2016-01-12901117ND
2016-01-12901116ND
2016-01-12901115ND
2016-04-12914965ND
2016-04-12914964ND
2016-04-12914966ND
2016-04-12914967ND
2016-07-069318000.550 ppb
2016-07-069317990.440 ppb
2016-07-069318010.320 ppb
2016-07-119323600.330 ppb
2016-10-109524390.280 ppb
2016-10-109524410.250 ppb
2016-10-10952440ND
2016-10-109524420.310 ppb
2017-01-109692630.640 ppb
2017-01-109692620.280 ppb
2017-01-109692650.270 ppb
2017-01-109692640.250 ppb
2017-04-119826090.320 ppb
2017-04-119826070.320 ppb
2017-04-119826060.230 ppb
2017-04-119826080.260 ppb
2017-07-111003299ND
2017-07-111003297ND
2017-07-111003296ND
2017-07-111003298ND
2017-10-091023247ND
2017-10-091023246ND
2017-10-091023244ND
2017-10-091023245ND
2018-01-0910363990.510 ppb
2018-01-091036401ND
2018-01-091036398ND
2018-01-091036400ND
2018-04-101049521ND
2018-04-101049519ND
2018-04-101049520ND
2018-04-101049518ND
2018-07-101065950ND
2018-07-101065951ND
2018-07-101065948ND
2018-07-101065949ND
2018-10-101086467ND
2018-10-101086469ND
2018-10-1010864700.300 ppb
2018-10-1010864680.550 ppb
2019-01-071099655ND
2019-01-071099653ND
2019-01-071099652ND
2019-01-071099654ND
2019-04-101114693ND
2019-04-101114695ND
2019-04-101114692ND
2019-04-101114694ND
2019-07-081132356ND
2019-07-0811323590.210 ppb
2019-07-0811323570.220 ppb
2019-07-0811323580.230 ppb
2019-10-1011544490.230 ppb
2019-10-1011544520.240 ppb
2019-10-1011544510.260 ppb
2019-10-1011544500.520 ppb