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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Lahaina

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

 

101

Samples

0

Samples exceeding legal limit (MCL)

68

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014N/A00N/A
20153.62 ppb2625ND - 7.70 ppb
20161.18 ppb167ND - 6.70 ppb
20171.44 ppb2115ND - 10.00 ppb
20180.607 ppb197ND - 2.70 ppb
20192.65 ppb1914ND - 8.80 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
2015-01-142015011602036.30 ppb
2015-01-142015011602044.40 ppb
2015-01-142015011602053.90 ppb
2015-01-142015011602066.30 ppb
2015-01-142015011602075.50 ppb
2015-01-142015011602080.650 ppb
2015-01-26201501280332ND
2015-01-262015012807566.80 ppb
2015-04-102015041509662.90 ppb
2015-04-102015041509672.80 ppb
2015-04-102015041509686.90 ppb
2015-04-102015041509691.30 ppb
2015-04-102015041509703.30 ppb
2015-04-132015041509811.70 ppb
2015-07-022015070705000.600 ppb
2015-07-022015070705010.590 ppb
2015-07-022015070705023.80 ppb
2015-07-022015070705034.10 ppb
2015-07-022015070705042.20 ppb
2015-07-022015070705051.20 ppb
2015-10-092015101306426.00 ppb
2015-10-092015101306435.00 ppb
2015-10-092015101306442.80 ppb
2015-10-092015101306457.70 ppb
2015-10-092015101306463.70 ppb
2015-10-092015101306473.80 ppb
2016-01-07ND
2016-01-07ND
2016-01-074.70 ppb
2016-01-07ND
2016-01-070.580 ppb
2016-01-07ND
2016-02-22ND
2016-02-226.70 ppb
2016-04-141.20 ppb
2016-04-142.00 ppb
2016-07-21ND
2016-07-21ND
2016-09-26ND
2016-10-060.950 ppb
2016-10-062.80 ppb
2016-11-28ND
2017-01-120.620 ppb
2017-01-12ND
2017-01-230.610 ppb
2017-01-230.970 ppb
2017-01-30ND
2017-01-30ND
2017-01-30ND
2017-01-3010.00 ppb
2017-01-30ND
2017-04-06ND
2017-04-060.760 ppb
2017-04-061.10 ppb
2017-04-060.790 ppb
2017-07-142.00 ppb
2017-07-140.990 ppb
2017-07-142.30 ppb
2017-07-141.10 ppb
2017-10-063.60 ppb
2017-10-061.60 ppb
2017-10-061.40 ppb
2017-10-062.40 ppb
2018-01-11201801170695ND
2018-01-11201801170694ND
2018-01-112018011706930.540 ppb
2018-01-11201801170696ND
2018-01-312018010310062.70 ppb
2018-01-31201801031004ND
2018-03-22201803281100ND
2018-04-05201804110019ND
2018-04-05201804110018ND
2018-04-05201804110017ND
2018-04-05201804110020ND
2018-07-06201807111033ND
2018-07-232018072503841.10 ppb
2018-07-23201807250382ND
2018-07-23201807250383ND
2018-10-042018100905202.10 ppb
2018-10-042018100905191.50 ppb
2018-10-042018100905182.00 ppb
2018-10-042018100905211.60 ppb
2019-01-04201901080075ND
2019-01-04201901080074ND
2019-01-042019010800731.20 ppb
2019-01-042019010800762.30 ppb
2019-01-302019020102156.80 ppb
2019-01-30201902010199ND
2019-01-30201902010224ND
2019-04-022019040403501.40 ppb
2019-04-022019040403491.10 ppb
2019-04-022019040403482.60 ppb
2019-04-022019040403511.80 ppb
2019-07-262019073003166.20 ppb
2019-07-26201907300315ND
2019-07-262019073003141.30 ppb
2019-07-262019073003178.80 ppb
2019-10-032019100806146.70 ppb
2019-10-032019100806131.000 ppb
2019-10-032019100806123.10 ppb
2019-10-032019100806156.10 ppb