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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Richmond County 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

 

100

Samples

0

Samples exceeding legal limit (MCL)

62

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20141.78 ppb1612ND - 6.00 ppb
20151.72 ppb1614ND - 2.70 ppb
20161.03 ppb169ND - 3.30 ppb
20171.03 ppb2017ND - 2.50 ppb
20180.375 ppb166ND - 1.000 ppb
20190.625 ppb164ND - 3.00 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
2014-02-1092189429001DISND
2014-02-1092189429002DISND
2014-02-1092189429003DISND
2014-02-1092189429004DISND
2014-05-1392201450002DIS1.10 ppb
2014-05-1392201450003DIS1.10 ppb
2014-05-1392201450004DIS1.20 ppb
2014-05-1392201450001DIS1.10 ppb
2014-08-1292213164001TTH1.000 ppb
2014-08-1292213164002TTH1.40 ppb
2014-08-1292213164003TTH6.00 ppb
2014-08-1292213164004TTH5.50 ppb
2014-11-1092225295002TTH2.10 ppb
2014-11-1092225295004TTH2.60 ppb
2014-11-1092225295003TTH2.80 ppb
2014-11-1092225295001TTH2.60 ppb
2015-02-101.60 ppb
2015-02-101.40 ppb
2015-02-101.50 ppb
2015-02-101.60 ppb
2015-05-121.90 ppb
2015-05-122.10 ppb
2015-05-122.20 ppb
2015-05-122.30 ppb
2015-08-112.40 ppb
2015-08-112.70 ppb
2015-08-111.80 ppb
2015-08-111.80 ppb
2015-11-10ND
2015-11-102.10 ppb
2015-11-10ND
2015-11-102.10 ppb
2016-02-0992286110001TTHND
2016-02-0992286110002TTHND
2016-02-0992286110003TTHND
2016-02-0992286110004TTH1.10 ppb
2016-05-1092297286004TTH1.50 ppb
2016-05-1092297286003TTHND
2016-05-1092297286002TTH1.30 ppb
2016-05-1092297286001TTH1.000 ppb
2016-08-0992308400001TTHND
2016-08-0992308400002TTH2.90 ppb
2016-08-0992308400003TTH2.00 ppb
2016-08-0992308400004TTH3.30 ppb
2016-11-0792319151003TTH1.80 ppb
2016-11-0792319151004TTHND
2016-11-0792319151005TTH1.50 ppb
2016-11-0792319151006TTHND
2017-02-1492330203004TTH2.00 ppb
2017-02-1492330203003TTH2.50 ppb
2017-02-1492330203002TTH1.80 ppb
2017-02-1492330203001TTH1.20 ppb
2017-05-12733-171.000 ppb
2017-05-12736-171.000 ppb
2017-05-12735-171.000 ppb
2017-05-12734-171.000 ppb
2017-08-081201-171.000 ppb
2017-08-081199-171.000 ppb
2017-08-081200-171.000 ppb
2017-08-081202-171.000 ppb
2017-08-311421-17ND
2017-08-311420-171.000 ppb
2017-08-311423-171.000 ppb
2017-08-311422-171.000 ppb
2017-11-061910-171.000 ppb
2017-11-061908-171.000 ppb
2017-11-061909-17ND
2017-11-061911-17ND
2018-02-06229-18 ND
2018-02-06228-18 ND
2018-02-06227-18 ND
2018-02-06226-18 ND
2018-05-08765-18 1.000 ppb
2018-05-08762-18 1.000 ppb
2018-05-08763-18 1.000 ppb
2018-05-08764-18 1.000 ppb
2018-08-061435-18A 1.000 ppb
2018-08-061434-18A ND
2018-08-061433-18A ND
2018-08-061432-18A 1.000 ppb
2018-11-132255-18 ND
2018-11-132256-18 ND
2018-11-132257-18 ND
2018-11-132258-18 ND
2019-02-112970-19 ND
2019-02-112971-19 ND
2019-02-112972-19 ND
2019-02-112973-19 ND
2019-05-153783-19 ND
2019-05-153786-19 ND
2019-05-153785-19 ND
2019-05-153784-19 ND
2019-08-144707-19 ND
2019-08-144709-19 ND
2019-08-144708-19 ND
2019-08-144706-19 ND
2019-11-145536-19 3.00 ppb
2019-11-145535-19 2.00 ppb
2019-11-145534-19 3.00 ppb
2019-11-145533-19 2.00 ppb