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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

City of Petersburg

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

 

88

Samples

0

Samples exceeding legal limit (MCL)

41

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.436 ppb168ND - 2.19 ppb
20150.188 ppb164ND - 0.800 ppb
20162.49 ppb1613ND - 5.52 ppb
20171.37 ppb127ND - 2.69 ppb
20180.289 ppb164ND - 1.24 ppb
20190.742 ppb128ND - 1.30 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
2014-01-1614-T1PET05ND
2014-01-1614-T1PET02ND
2014-01-1614-T1PET04ND
2014-01-1614-T1PET06ND
2014-04-0914-T2PET050.0800 ppb
2014-04-0914-T2PET020.0600 ppb
2014-04-0914-T2PET040.0500 ppb
2014-04-0914-T2PET06ND
2014-07-0914-T3PET020.220 ppb
2014-07-0914-T3PET05ND
2014-07-0914-T3PET04ND
2014-07-0914-T3PET06ND
2014-10-0814-T4PET051.96 ppb
2014-10-0814-T4PET042.08 ppb
2014-10-0814-T4PET022.19 ppb
2014-10-0814-T4PET060.338 ppb
2015-01-0900005-APPOMATTOXND
2015-01-0900005-APPOMATTOXND
2015-01-0900005-APPOMATTOXND
2015-01-0900005-APPOMATTOXND
2015-05-04460260-EUROFINSND
2015-05-04460260-EUROFINSND
2015-05-04460260-EUROFINSND
2015-05-04460260-EUROFINSND
2015-07-08460260-EUROFINS0.700 ppb
2015-07-08460260-EUROFINS0.700 ppb
2015-07-08460260-EUROFINS0.800 ppb
2015-07-08460260-EUROFINS0.800 ppb
2015-10-12460260-EUROFINSND
2015-10-12460260-EUROFINSND
2015-10-12460260-EUROFINSND
2015-10-12460260-EUROFINSND
2016-01-1116-T1PET020.500 ppb
2016-01-1116-T1PET04ND
2016-01-1116-T1PET05ND
2016-01-1116-T1PET06ND
2016-04-1116-T2PET052.12 ppb
2016-04-1116-T2PET062.05 ppb
2016-04-1116-T2PET041.99 ppb
2016-04-1116-T2PET021.90 ppb
2016-07-1216-T3PET063.56 ppb
2016-07-1216-T3PET055.27 ppb
2016-07-1216-T3PET045.43 ppb
2016-07-1216-T3PET025.52 ppb
2016-10-1216-T4PET053.08 ppb
2016-10-1216-T4PET043.06 ppb
2016-10-1216-T4PET022.90 ppb
2016-10-1216-T4PET062.43 ppb
2017-01-2517-T1PET04ND
2017-01-2517-T1PET02ND
2017-01-2517-T1PET05ND
2017-01-2517-T1PET06ND
2017-07-1317-T3PET061.78 ppb
2017-07-1317-T3PET042.51 ppb
2017-07-1317-T3PET052.69 ppb
2017-07-1317-T3PET022.69 ppb
2017-10-1817-T4PET06ND
2017-10-1817-T4PET052.29 ppb
2017-10-1817-T4PET022.32 ppb
2017-10-1817-T4PET042.21 ppb
2018-01-1018-T1PET06ND
2018-01-1018-T1PET051.24 ppb
2018-01-1018-T1PET04ND
2018-01-1018-T1PET021.22 ppb
2018-04-1118-T2PET061.11 ppb
2018-04-1118-T2PET02ND
2018-04-1118-T2PET04ND
2018-04-1118-T2PET05ND
2018-07-1818-T3PET021.06 ppb
2018-07-1818-T3PET04ND
2018-07-1818-T3PET05ND
2018-07-1818-T3PET06ND
2018-10-0218-T4PET02ND
2018-10-0218-T4PET04ND
2018-10-0218-T4PET05ND
2018-10-0218-T4PET06ND
2019-04-1019D0507-01-TTHMND
2019-04-1019D0507-02-TTHMND
2019-04-1019D0507-03-TTHMND
2019-04-1019D0507-04-TTHMND
2019-07-30E1907035281.000 ppb
2019-07-30E1907035441.000 ppb
2019-07-30E1907035420.900 ppb
2019-07-30E1907035261.10 ppb
2019-10-23E1910042741.10 ppb
2019-10-23E1910042721.30 ppb
2019-10-23E1910042711.30 ppb
2019-10-31E1910061131.20 ppb