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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

East Orange County Water District - Rz

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

 

80

Samples

0

Samples exceeding legal limit (MCL)

43

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.60 ppb96ND - 4.57 ppb
20155.84 ppb128ND - 28.8 ppb
20163.04 ppb138ND - 10.4 ppb
20172.32 ppb167ND - 12.9 ppb
20182.60 ppb168ND - 16.4 ppb
20192.81 ppb146ND - 10.3 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
2014-03-049469-802-13001.79 ppb
2014-03-049469-801-12001.68 ppb
2014-04-164417-001-1105ND
2014-08-274417-001-0920ND
2014-09-029469-802-14321.51 ppb
2014-09-029469-801-13133.14 ppb
2014-11-254417-001-0905ND
2014-12-029469-802-11221.67 ppb
2014-12-029469-801-13404.57 ppb
2015-03-039469-802-08391.49 ppb
2015-03-039469-801-12284.79 ppb
2015-03-184417-001-1225ND
2015-05-064417-001-0845ND
2015-06-029469-801-153028.8 ppb
2015-06-029469-802-131511.5 ppb
2015-08-114417-001-1045ND
2015-09-019469-801-12265.60 ppb
2015-09-019469-802-130911.4 ppb
2015-12-014417-001-1040ND
2015-12-019469-801-08403.18 ppb
2015-12-019469-802-09553.35 ppb
2016-02-254417-001-0900ND
2016-03-019469-801-13024.63 ppb
2016-03-019469-802-09251.96 ppb
2016-05-034417-001-1120ND
2016-06-079469-802-09424.56 ppb
2016-06-079469-801-090510.4 ppb
2016-08-084417-001-0840ND
2016-09-069469-802-08202.66 ppb
2016-09-069469-801-11509.23 ppb
2016-10-134417-002-0900ND
2016-10-134417-001-0840ND
2016-12-069469-802-13061.90 ppb
2016-12-069469-801-11404.20 ppb
2017-02-084417-001-1030ND
2017-02-084417-002-1040ND
2017-03-079469-801-123012.9 ppb
2017-03-079469-802-141212.9 ppb
2017-05-034417-001-0925ND
2017-05-034417-002-0940ND
2017-06-069469-802-08271.30 ppb
2017-06-069469-801-10031.32 ppb
2017-08-074417-002-1010ND
2017-08-104417-001-1035ND
2017-11-014417-001-0850ND
2017-11-084417-002-09201.80 ppb
2017-11-304417-002-1330ND
2017-11-304417-002-1320ND
2017-12-059469-802-13573.58 ppb
2017-12-059469-801-10383.32 ppb
2018-02-144417-001-1005ND
2018-02-154417-002-0945ND
2018-03-069469-801-125216.4 ppb
2018-03-069469-802-13481.75 ppb
2018-05-024417-001-0855ND
2018-05-034417-002-0850ND
2018-06-059469-801-09503.22 ppb
2018-06-059469-802-15471.61 ppb
2018-08-024417-001-1000ND
2018-08-024417-002-1010ND
2018-09-049469-801-09307.02 ppb
2018-09-049469-802-13451.22 ppb
2018-10-304417-001-0820ND
2018-10-304417-002-0830ND
2018-12-049469-802-12405.17 ppb
2018-12-049469-801-13435.14 ppb
2019-02-204417-002-0850ND
2019-02-204417-001-0905ND
2019-03-059469-802-111810.1 ppb
2019-03-059469-801-131910.3 ppb
2019-04-234417-002-0910ND
2019-04-234417-001-0855ND
2019-06-049469-802-13296.08 ppb
2019-06-049469-801-13296.41 ppb
2019-09-039469-801-13343.36 ppb
2019-09-039469-802-15203.05 ppb
2019-09-034417-002-0905ND
2019-09-034417-001-0855ND
2019-11-054417-002-0930ND
2019-11-054417-001-0925ND