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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Southwood Water System

Dibromochloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Dibromochloromethane 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

 

87

Samples

0

Samples exceeding legal limit (MCL)

35

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.511 ppb1811ND - 1.50 ppb
20150.480 ppb158ND - 1.40 ppb
20160.142 ppb122ND - 1.10 ppb
20170.120 ppb153ND - 0.800 ppb
20180.244 ppb124ND - 1.000 ppb
20190.297 ppb157ND - 0.730 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for dibromochloromethane 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
2014-05-1673599ND
2014-05-16735940.500 ppb
2014-05-16735901.10 ppb
2014-05-16735980.600 ppb
2014-05-1673597ND
2014-05-16735911.50 ppb
2014-05-16735930.900 ppb
2014-05-16735950.900 ppb
2014-05-16735920.600 ppb
2014-05-1673596ND
2014-08-21740550.800 ppb
2014-08-2174057ND
2014-08-21740580.600 ppb
2014-08-21740560.900 ppb
2014-11-0474473ND
2014-11-0474471ND
2014-11-04744720.800 ppb
2014-11-0474474ND
2015-03-1174808ND
2015-03-1174807ND
2015-03-1174806ND
2015-03-11748090.600 ppb
2015-03-18748160.600 ppb
2015-03-18748150.700 ppb
2015-03-24748380.600 ppb
2015-03-2474837ND
2015-05-06749621.40 ppb
2015-05-06749630.900 ppb
2015-07-0775114ND
2015-08-05752541.40 ppb
2015-08-05752531.000 ppb
2015-11-0675652ND
2015-11-0675653ND
2016-03-110.600 ppb
2016-03-11ND
2016-03-11ND
2016-03-14ND
2016-04-14ND
2016-05-13ND
2016-05-13ND
2016-05-13ND
2016-08-041.10 ppb
2016-08-04ND
2016-11-11ND
2016-11-11ND
2017-02-22ND
2017-02-22ND
2017-02-22ND
2017-02-22ND
2017-02-22ND
2017-02-22ND
2017-02-22ND
2017-03-22ND
2017-03-22ND
2017-05-15ND
2017-05-150.800 ppb
2017-08-090.500 ppb
2017-08-09ND
2017-11-14ND
2017-11-140.500 ppb
2018-02-140.600 ppb
2018-02-141.000 ppb
2018-03-14ND
2018-03-14ND
2018-05-04ND
2018-05-15ND
2018-05-150.760 ppb
2018-07-19ND
2018-08-21ND
2018-08-210.570 ppb
2018-11-15ND
2018-11-15ND
2019-02-08ND
2019-02-080.520 ppb
2019-05-210.730 ppb
2019-05-210.700 ppb
2019-06-26ND
2019-07-12ND
2019-07-12ND
2019-09-050.690 ppb
2019-09-050.500 ppb
2019-09-05ND
2019-10-15ND
2019-11-130.640 ppb
2019-11-130.680 ppb
2019-12-05ND
2019-12-05ND