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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

City of Ridgeland

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

 

80

Samples

0

Samples exceeding legal limit (MCL)

18

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.596 ppb163ND - 4.46 ppb
20150.872 ppb165ND - 7.10 ppb
20160.653 ppb163ND - 5.79 ppb
20171.46 ppb163ND - 9.46 ppb
2018N/A00N/A
20191.16 ppb164ND - 8.03 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
2014-03-10140311-022THND
2014-03-10140311-021THND
2014-03-10140311-014THND
2014-03-10140311-013THND
2014-06-09140610-018THND
2014-06-09140610-017THND
2014-06-09140610-010TH2.49 ppb
2014-06-09140610-009THND
2014-09-09140910-004THND
2014-09-09140910-001TH2.59 ppb
2014-09-09140910-002THND
2014-09-09140910-003THND
2014-12-09141210-004THND
2014-12-09141210-003THND
2014-12-09141210-002THND
2014-12-09141210-001TH4.46 ppb
2015-03-11150312-025THND
2015-03-11150312-026THND
2015-03-11150312-028THND
2015-03-11150312-027THND
2015-06-08150609-004THND
2015-06-08150609-003THND
2015-06-08150609-002TH7.10 ppb
2015-06-08150609-001THND
2015-09-14150915-010TH2.39 ppb
2015-09-14150915-009THND
2015-09-14150915-002THND
2015-09-14150915-001THND
2015-12-07151208-006TH1.80 ppb
2015-12-07151208-001TH1.30 ppb
2015-12-07151208-002TH1.36 ppb
2015-12-07151208-005THND
2016-03-15160316-008THND
2016-03-15160316-007THND
2016-03-15160316-006TH1.20 ppb
2016-03-15160316-005THND
2016-06-07160608-005THND
2016-06-07160608-008TH3.45 ppb
2016-06-07160608-007THND
2016-06-07160608-006THND
2016-09-06160907-010TH5.79 ppb
2016-09-06160907-009THND
2016-09-06160907-004THND
2016-09-06160907-003THND
2016-12-12161213-008THND
2016-12-12161213-007THND
2016-12-12161213-005THND
2016-12-12161213-004THND
2017-03-06170307-010THND
2017-03-06170307-007THND
2017-03-06170307-008THND
2017-03-06170307-009THND
2017-06-05170606-006TH7.66 ppb
2017-06-05170606-005THND
2017-06-05170606-004THND
2017-06-05170606-003THND
2017-09-05170906-001THND
2017-09-05170906-002THND
2017-09-05170906-004TH6.25 ppb
2017-09-05170906-003TH9.46 ppb
2017-12-05171206-008THND
2017-12-05171206-007THND
2017-12-05171206-006THND
2017-12-05171206-005THND
2019-02-25190226-006TH6.59 ppb
2019-02-25190226-005THND
2019-02-25190226-004THND
2019-02-25190226-003THND
2019-05-21190522-020TH1.75 ppb
2019-05-21190522-017THND
2019-05-21190522-018THND
2019-05-21190522-019THND
2019-09-04190905-009TH8.03 ppb
2019-09-04190905-008THND
2019-09-04190905-007THND
2019-09-04190905-006TH2.20 ppb
2019-12-11191212-007THND
2019-12-11191212-010THND
2019-12-11191212-009THND
2019-12-11191212-008THND