Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Bromodichloromethane

Wailuku

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

 

130

Samples

0

Samples exceeding legal limit (MCL)

79

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
20150.782 ppb3828ND - 2.00 ppb
20160.760 ppb2718ND - 3.40 ppb
20170.169 ppb276ND - 1.000 ppb
20180.384 ppb2010ND - 1.20 ppb
20191.63 ppb1817ND - 9.00 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
2015-01-142015011902130.700 ppb
2015-01-142015011902140.760 ppb
2015-01-142015011902150.600 ppb
2015-01-142015011902161.000 ppb
2015-01-142015011902180.790 ppb
2015-01-142015011902191.50 ppb
2015-01-152015011902230.600 ppb
2015-01-152015011902240.520 ppb
2015-01-26201501280565ND
2015-01-26201501280741ND
2015-01-26201501280752ND
2015-01-262015012807531.40 ppb
2015-04-092015041408170.670 ppb
2015-04-092015041408180.990 ppb
2015-04-092015041408190.700 ppb
2015-04-092015041408200.970 ppb
2015-04-092015041408311.50 ppb
2015-04-092015041408321.10 ppb
2015-04-092015041408331.10 ppb
2015-04-092015041408342.00 ppb
2015-06-16201506180519ND
2015-07-222015072402721.50 ppb
2015-07-222015072402730.570 ppb
2015-07-22201507240274ND
2015-07-222015072402750.970 ppb
2015-07-22201507240276ND
2015-07-22201507240277ND
2015-07-222015072402781.20 ppb
2015-07-22201507240279ND
2015-09-08201509100855ND
2015-10-09201510130316ND
2015-10-092015101303171.50 ppb
2015-10-092015101303181.000 ppb
2015-10-092015101303191.40 ppb
2015-10-092015101303201.30 ppb
2015-10-092015101303210.920 ppb
2015-10-092015101303220.670 ppb
2015-10-092015101303231.80 ppb
2016-01-150.880 ppb
2016-01-150.810 ppb
2016-01-150.910 ppb
2016-01-151.000 ppb
2016-01-151.000 ppb
2016-01-150.900 ppb
2016-01-150.960 ppb
2016-01-152.00 ppb
2016-02-233.40 ppb
2016-02-26ND
2016-02-26ND
2016-02-26ND
2016-04-140.560 ppb
2016-04-140.580 ppb
2016-04-14ND
2016-04-141.10 ppb
2016-07-150.830 ppb
2016-07-150.700 ppb
2016-07-150.510 ppb
2016-07-152.10 ppb
2016-09-12ND
2016-10-06ND
2016-10-060.580 ppb
2016-10-06ND
2016-10-061.70 ppb
2016-11-30ND
2016-11-30ND
2017-01-13ND
2017-01-130.520 ppb
2017-01-13ND
2017-01-131.000 ppb
2017-01-31ND
2017-01-31ND
2017-01-31ND
2017-02-240.870 ppb
2017-02-24ND
2017-02-27ND
2017-02-27ND
2017-02-27ND
2017-04-06ND
2017-04-06ND
2017-04-06ND
2017-04-060.870 ppb
2017-05-19ND
2017-05-19ND
2017-07-13ND
2017-07-13ND
2017-07-13ND
2017-07-130.640 ppb
2017-09-21ND
2017-10-06ND
2017-10-06ND
2017-10-06ND
2017-10-060.650 ppb
2018-01-11201801180640ND
2018-01-112018011806430.690 ppb
2018-01-11201801180642ND
2018-01-112018011806410.790 ppb
2018-01-30201801030999ND
2018-01-312018010309980.630 ppb
2018-01-31201801031000ND
2018-04-052018041005030.630 ppb
2018-04-052018041005060.840 ppb
2018-04-05201804100505ND
2018-04-052018041005041.20 ppb
2018-05-17201805180453ND
2018-07-022018070601760.530 ppb
2018-07-02201807060179ND
2018-07-02201807060178ND
2018-07-022018070601770.840 ppb
2018-10-04201810090382ND
2018-10-042018100903850.520 ppb
2018-10-04201810090384ND
2018-10-042018100903831.000 ppb
2019-01-032019010800771.000 ppb
2019-01-032019010800800.500 ppb
2019-01-032019010800790.570 ppb
2019-01-032019010800782.40 ppb
2019-02-042019020501789.00 ppb
2019-03-07201903120187ND
2019-04-052019040904740.980 ppb
2019-04-052019040904771.10 ppb
2019-04-052019040904760.590 ppb
2019-04-052019040904752.10 ppb
2019-07-262019073003381.30 ppb
2019-07-262019073003411.30 ppb
2019-07-262019073003400.670 ppb
2019-07-262019073003391.50 ppb
2019-10-032019100806041.60 ppb
2019-10-032019100806071.50 ppb
2019-10-032019100806061.10 ppb
2019-10-032019100806052.20 ppb