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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

City of Redding

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

 

86

Samples

0

Samples exceeding legal limit (MCL)

48

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20141.72 ppb139ND - 4.10 ppb
20151.51 ppb147ND - 3.90 ppb
20161.48 ppb136ND - 5.30 ppb
20171.34 ppb116ND - 5.50 ppb
20181.30 ppb138ND - 2.65 ppb
20191.24 ppb2212ND - 2.98 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
2014-01-061677-801-09251.40 ppb
2014-01-061677-802-10552.40 ppb
2014-01-061677-803-13202.10 ppb
2014-04-071677-802-1040ND
2014-04-071677-801-09501.20 ppb
2014-04-071677-803-13254.10 ppb
2014-07-011677-802-1000ND
2014-07-011677-801-08302.70 ppb
2014-07-011677-803-11302.60 ppb
2014-08-211677-066-1026ND
2014-10-021677-802-0915ND
2014-10-021677-801-08462.20 ppb
2014-10-021677-803-11403.60 ppb
2015-01-051677-802-1025ND
2015-01-051677-803-11552.30 ppb
2015-01-051677-801-08503.90 ppb
2015-04-011677-802-1250ND
2015-04-011677-803-10302.00 ppb
2015-04-011677-801-1315ND
2015-05-181677-022-1315ND
2015-07-061677-022-1020ND
2015-07-131677-803-09503.20 ppb
2015-07-141677-801-09353.00 ppb
2015-07-141677-802-0915ND
2015-10-071677-801-08353.20 ppb
2015-10-071677-803-12453.60 ppb
2015-10-071677-802-1000ND
2016-01-051677-801-08455.30 ppb
2016-01-051677-803-11154.80 ppb
2016-01-051677-802-0930ND
2016-07-051677-801-13102.40 ppb
2016-07-051677-803-10252.00 ppb
2016-07-051677-802-1115ND
2016-07-131677-006-0933ND
2016-07-131677-010-0940ND
2016-07-131677-012-1000ND
2016-08-021677-072-0840ND
2016-10-061677-801-09302.30 ppb
2016-10-061677-802-1015ND
2016-10-061677-803-11052.40 ppb
2017-01-041677-801-1335ND
2017-01-041677-802-1245ND
2017-01-041677-803-11502.20 ppb
2017-04-111677-801-1340ND
2017-04-111677-803-11152.10 ppb
2017-04-111677-802-1220ND
2017-07-111677-803-09481.70 ppb
2017-07-111677-801-11451.60 ppb
2017-10-041677-803-10351.63 ppb
2017-10-041677-801-13305.50 ppb
2017-10-041677-802-1210ND
2018-01-091677-803-07401.97 ppb
2018-01-091677-801-0930ND
2018-01-091677-802-1015ND
2018-04-091677-803-09302.65 ppb
2018-04-091677-802-0830ND
2018-04-091677-801-08001.51 ppb
2018-07-021677-073-1150ND
2018-07-101677-801-12202.31 ppb
2018-07-101677-802-10401.65 ppb
2018-07-101677-803-08222.37 ppb
2018-10-011677-801-10452.33 ppb
2018-10-011677-802-1120ND
2018-10-011677-803-07402.07 ppb
2019-01-111677-801-1150ND
2019-01-111677-802-1130ND
2019-01-111677-803-11152.70 ppb
2019-04-161677-803-09301.87 ppb
2019-04-161677-802-1000ND
2019-04-161677-801-11251.81 ppb
2019-07-101677-801-07302.95 ppb
2019-07-101677-803-09151.96 ppb
2019-07-101677-802-0835ND
2019-07-221677-025-1350ND
2019-07-221677-024-1150ND
2019-07-221677-023-1100ND
2019-07-221677-018-1340ND
2019-07-221677-009-1300ND
2019-07-221677-005-1215ND
2019-10-031677-806-10451.99 ppb
2019-10-031677-808-11052.17 ppb
2019-10-031677-805-10552.00 ppb
2019-10-031677-804-12152.98 ppb
2019-10-031677-803-11202.26 ppb
2019-10-031677-802-11552.90 ppb
2019-10-031677-801-12301.69 ppb