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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Ottumwa Water Works

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

 

96

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.0981 ppb163ND - 0.550 ppb
2015ND160ND
2016ND160ND
2017ND160ND
2018ND160ND
20190.198 ppb164ND - 0.810 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
2014-01-2920311110.550 ppb
2014-01-2920311120.520 ppb
2014-01-292031113ND
2014-01-2920311140.500 ppb
2014-04-232047179ND
2014-04-232047180ND
2014-04-232047181ND
2014-04-232047182ND
2014-07-162065528ND
2014-07-162065527ND
2014-07-162065525ND
2014-07-162065526ND
2014-10-272088173ND
2014-10-272088172ND
2014-10-272088175ND
2014-10-272088174ND
2015-01-201A51096-01ND
2015-01-201A51096-02ND
2015-01-201A51096-03ND
2015-01-201A51096-04ND
2015-04-081D50660-01ND
2015-04-081D50660-02ND
2015-04-081D50660-03ND
2015-04-081D50660-04ND
2015-07-231G51927-02ND
2015-07-231G51927-04ND
2015-07-231G51927-03ND
2015-07-231G51927-01ND
2015-10-221J51859-04ND
2015-10-221J51859-01ND
2015-10-221J51859-02ND
2015-10-221J51859-03ND
2016-01-141A60995-02ND
2016-01-141A60995-03ND
2016-01-141A60995-04ND
2016-01-141A60995-01ND
2016-04-211D61812-04ND
2016-04-211D61812-01ND
2016-04-211D61812-03ND
2016-04-211D61812-02ND
2016-07-181G61354-01ND
2016-07-181G61354-02ND
2016-07-181G61354-03ND
2016-07-181G61354-04ND
2016-10-181J61451-01ND
2016-10-181J61451-02ND
2016-10-181J61451-03ND
2016-10-181J61451-04ND
2017-02-241B71754-04ND
2017-02-241B71754-01ND
2017-02-241B71754-02ND
2017-02-241B71754-03ND
2017-04-251D71873-02ND
2017-04-251D71873-03ND
2017-04-251D71873-04ND
2017-04-251D71873-01ND
2017-07-191G71489-03ND
2017-07-191G71489-02ND
2017-07-191G71489-01ND
2017-07-191G71489-04ND
2017-10-181J71554-01ND
2017-10-181J71554-02ND
2017-10-181J71554-03ND
2017-10-181J71554-04ND
2018-01-181A81273-04ND
2018-01-181A81273-03ND
2018-01-181A81273-02ND
2018-01-181A81273-01ND
2018-04-241D81916-04ND
2018-04-241D81916-01ND
2018-04-241D81916-02ND
2018-04-241D81916-03ND
2018-07-191G81701-04ND
2018-07-191G81701-03ND
2018-07-191G81701-02ND
2018-07-191G81701-01ND
2018-10-101J81112-01ND
2018-10-101J81112-02ND
2018-10-101J81112-03ND
2018-10-101J81112-04ND
2019-01-241A91857-01ND
2019-01-241A91857-02ND
2019-01-241A91857-03ND
2019-01-241A91857-04ND
2019-04-151D91360-01ND
2019-04-151D91360-04ND
2019-04-151D91360-03ND
2019-04-151D91360-02ND
2019-07-161G91420-020.810 ppb
2019-07-161G91420-040.760 ppb
2019-07-161G91420-030.800 ppb
2019-07-161G91420-010.790 ppb
2019-10-211J91918-04ND
2019-10-211J91918-03ND
2019-10-211J91918-02ND
2019-10-211J91918-01ND