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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Brown Deer 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

 

95

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.412 ppb15150.200 ppb - 0.550 ppb
20150.346 ppb1615ND - 0.500 ppb
20160.262 ppb1614ND - 0.390 ppb
20170.270 ppb1611ND - 0.520 ppb
20180.168 ppb168ND - 0.380 ppb
20190.268 ppb1615ND - 0.350 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
2014-03-047732650.220 ppb
2014-03-047732620.240 ppb
2014-03-047732640.200 ppb
2014-06-047945330.510 ppb
2014-06-047945320.530 ppb
2014-06-047945340.550 ppb
2014-06-047945310.550 ppb
2014-08-268134160.520 ppb
2014-08-268134180.500 ppb
2014-08-268134170.470 ppb
2014-08-268134150.420 ppb
2014-11-248330570.360 ppb
2014-11-248330600.360 ppb
2014-11-248330590.360 ppb
2014-11-248330580.390 ppb
2015-03-058467370.280 ppb
2015-03-058467340.390 ppb
2015-03-058467360.380 ppb
2015-03-058467350.320 ppb
2015-05-288621750.340 ppb
2015-05-288621730.350 ppb
2015-05-288621740.310 ppb
2015-05-288621720.300 ppb
2015-08-27879516ND
2015-08-278795150.500 ppb
2015-08-278795140.480 ppb
2015-08-278795130.450 ppb
2015-11-308957210.370 ppb
2015-11-308957190.380 ppb
2015-11-308957200.350 ppb
2015-11-308957180.340 ppb
2016-03-039080500.330 ppb
2016-03-039080510.290 ppb
2016-03-039080520.280 ppb
2016-03-039080490.220 ppb
2016-06-019239790.240 ppb
2016-06-019239780.240 ppb
2016-06-019239810.230 ppb
2016-06-01923980ND
2016-08-30942583ND
2016-08-309425840.280 ppb
2016-08-309425860.280 ppb
2016-08-309425850.380 ppb
2016-11-299614570.320 ppb
2016-11-299614580.340 ppb
2016-11-299614560.370 ppb
2016-11-299614590.390 ppb
2017-03-019755760.290 ppb
2017-03-019755790.320 ppb
2017-03-019755770.340 ppb
2017-03-019755780.350 ppb
2017-05-30994101ND
2017-05-30994103ND
2017-05-30994104ND
2017-05-30994102ND
2017-09-0510158760.390 ppb
2017-09-0510158750.400 ppb
2017-09-0510158740.400 ppb
2017-09-0510158730.420 ppb
2017-11-2910312890.440 ppb
2017-11-2910312880.450 ppb
2017-11-2910312900.520 ppb
2017-12-041031738ND
2018-03-061043765ND
2018-03-061043764ND
2018-03-061043767ND
2018-03-061043766ND
2018-06-051058920ND
2018-06-051058918ND
2018-06-051058919ND
2018-06-051058921ND
2018-08-2910770740.380 ppb
2018-08-2910770710.320 ppb
2018-08-2910770730.350 ppb
2018-08-2910770720.350 ppb
2018-11-2610941750.310 ppb
2018-11-2610941760.360 ppb
2018-11-2610941730.300 ppb
2018-11-2610941740.310 ppb
2019-03-041107597ND
2019-03-0411076000.230 ppb
2019-03-0411075990.250 ppb
2019-03-0411075980.260 ppb
2019-06-0311245740.320 ppb
2019-06-0311245730.280 ppb
2019-06-0311245720.280 ppb
2019-06-0311245750.210 ppb
2019-08-2811443340.300 ppb
2019-08-2811443360.340 ppb
2019-08-2811443350.350 ppb
2019-08-2811443370.350 ppb
2019-11-2511625910.270 ppb
2019-11-2511625920.280 ppb
2019-11-2511625900.330 ppb
2019-12-0211628320.230 ppb