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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

City of Norfolk

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

 

203

Samples

0

Samples exceeding legal limit (MCL)

195

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20142.11 ppb33331.40 ppb - 2.80 ppb
20152.22 ppb32321.40 ppb - 3.90 ppb
20161.28 ppb42420.500 ppb - 2.30 ppb
20170.966 ppb3224ND - 1.60 ppb
20181.59 ppb32321.10 ppb - 2.30 ppb
20191.33 ppb32321.000 ppb - 1.80 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
2014-02-1114026205-THM2.60 ppb
2014-02-1114026207-THM2.50 ppb
2014-02-1114026206-THM2.40 ppb
2014-02-1114026204-THM2.40 ppb
2014-02-1114026203-THM2.30 ppb
2014-02-1114026209-THM1.80 ppb
2014-02-1114026202-THM1.70 ppb
2014-02-1114026208-THM1.70 ppb
2014-05-13201405190156-THM2.80 ppb
2014-05-13201405190157-THM2.70 ppb
2014-05-13201405190155-THM2.60 ppb
2014-05-13201405190158-THM2.50 ppb
2014-05-13201405190154-THM2.20 ppb
2014-05-13201405190152-VOC2.00 ppb
2014-05-13201405190159-THM2.00 ppb
2014-05-13201405190153-THM1.70 ppb
2014-05-13201405190151-VOC1.40 ppb
2014-08-1214083442-THM2.60 ppb
2014-08-1214083440-THM2.60 ppb
2014-08-1214083441-THM2.60 ppb
2014-08-1214083443-THM2.50 ppb
2014-08-1214083439-THM2.50 ppb
2014-08-1214083444-THM2.10 ppb
2014-08-1214083438-THM1.90 ppb
2014-08-1214083445-THM1.90 ppb
2014-11-1214116651-THM1.80 ppb
2014-11-1214116649-THM1.80 ppb
2014-11-1214116650-THM1.80 ppb
2014-11-1214116653-THM1.70 ppb
2014-11-1214116654-THM1.70 ppb
2014-11-1214116652-THM1.70 ppb
2014-11-1214116655-THM1.60 ppb
2014-11-1214116648-THM1.50 ppb
2015-02-1000225-CITY OF NO1.70 ppb
2015-02-1000225-CITY OF NO1.70 ppb
2015-02-1000225-CITY OF NO1.70 ppb
2015-02-1000225-CITY OF NO1.60 ppb
2015-02-1000225-CITY OF NO1.60 ppb
2015-02-1000225-CITY OF NO1.60 ppb
2015-02-1000225-CITY OF NO1.60 ppb
2015-02-1000225-CITY OF NO1.50 ppb
2015-05-1200225-CITY OF NO1.90 ppb
2015-05-1200225-CITY OF NO1.90 ppb
2015-05-1200225-CITY OF NO1.80 ppb
2015-05-1200225-CITY OF NO1.80 ppb
2015-05-1200225-CITY OF NO1.80 ppb
2015-05-1200225-CITY OF NO1.40 ppb
2015-05-1200225-CITY OF NO1.40 ppb
2015-05-1200225-CITY OF NO1.40 ppb
2015-08-1100225-CITY OF NO3.90 ppb
2015-08-1100225-CITY OF NO3.80 ppb
2015-08-1100225-CITY OF NO3.70 ppb
2015-08-1100225-CITY OF NO3.60 ppb
2015-08-1100225-CITY OF NO3.40 ppb
2015-08-1100225-CITY OF NO2.30 ppb
2015-08-1100225-CITY OF NO1.70 ppb
2015-08-1100225-CITY OF NO1.60 ppb
2015-11-0900225-CITY OF NO2.80 ppb
2015-11-0900225-CITY OF NO2.80 ppb
2015-11-0900225-CITY OF NO2.80 ppb
2015-11-0900225-CITY OF NO2.80 ppb
2015-11-0900225-CITY OF NO2.70 ppb
2015-11-0900225-CITY OF NO2.30 ppb
2015-11-0900225-CITY OF NO2.20 ppb
2015-11-0900225-CITY OF NO2.10 ppb
2016-02-0916022769-THM1.60 ppb
2016-02-0916022770-THM1.60 ppb
2016-02-0916022767-THM1.50 ppb
2016-02-0916022768-THM1.50 ppb
2016-02-0916022772-THM1.50 ppb
2016-02-0916022766-THM1.40 ppb
2016-02-0916022771-THM1.40 ppb
2016-02-0916022773-THM1.30 ppb
2016-05-1016055870-THM2.30 ppb
2016-05-1016055871-THM2.30 ppb
2016-05-1016055869-THM2.20 ppb
2016-05-1016055868-THM2.10 ppb
2016-05-1016055872-THM2.10 ppb
2016-05-1016055873-THM1.20 ppb
2016-05-1016055867-THM1.10 ppb
2016-05-1016055874-THM1.000 ppb
2016-08-0916089117-THM2.30 ppb
2016-08-0916089119-THM2.30 ppb
2016-08-0916089116-THM2.20 ppb
2016-08-0916089118-THM2.20 ppb
2016-08-0916089120-THM2.20 ppb
2016-08-0916089115-THM1.40 ppb
2016-08-0916089121-THM1.40 ppb
2016-08-0916089122-THM1.30 ppb
2016-11-0816112200-THM0.800 ppb
2016-11-0816112203-THM0.800 ppb
2016-11-0816112204-THM0.800 ppb
2016-11-0816-204960.800 ppb
2016-11-0816-205000.800 ppb
2016-11-0816-204990.800 ppb
2016-11-0816112201-THM0.700 ppb
2016-11-0816112202-THM0.700 ppb
2016-11-0816112205-THM0.700 ppb
2016-11-0816-204940.700 ppb
2016-11-0816-204970.700 ppb
2016-11-0816-204980.700 ppb
2016-11-0816-205010.700 ppb
2016-11-0816112199-THM0.500 ppb
2016-11-0816112206-THM0.500 ppb
2016-11-0816-204930.500 ppb
2016-11-0816-204950.500 ppb
2016-11-0816-205020.500 ppb
2017-02-1417025514-THMND
2017-02-1417025515-THMND
2017-02-1417025508-THMND
2017-02-1417025509-THMND
2017-02-1417025510-THMND
2017-02-1417025511-THMND
2017-02-1417025512-THMND
2017-02-1417025513-THMND
2017-05-0917058266-THM1.30 ppb
2017-05-0917058268-THM1.30 ppb
2017-05-0917058269-THM1.30 ppb
2017-05-0917058265-THM1.20 ppb
2017-05-0917058267-THM1.20 ppb
2017-05-0917058270-THM1.20 ppb
2017-05-0917058271-THM1.20 ppb
2017-05-0917058272-THM1.20 ppb
2017-08-0817081393-THM1.60 ppb
2017-08-0817081386-THM1.50 ppb
2017-08-0817081387-THM1.50 ppb
2017-08-0817081388-THM1.50 ppb
2017-08-0817081389-THM1.50 ppb
2017-08-0817081390-THM1.50 ppb
2017-08-0817081392-THM1.50 ppb
2017-08-0817081391-THM1.40 ppb
2017-11-1417114473-THM1.20 ppb
2017-11-1417114480-THM1.20 ppb
2017-11-1417114474-THM1.10 ppb
2017-11-1417114475-THM1.10 ppb
2017-11-1417114476-THM1.10 ppb
2017-11-1417114477-THM1.10 ppb
2017-11-1417114478-THM1.10 ppb
2017-11-1417114479-THM1.10 ppb
2018-02-1318027197-THM1.40 ppb
2018-02-1318027198-THM1.30 ppb
2018-02-1318027199-THM1.30 ppb
2018-02-1318027200-THM1.30 ppb
2018-02-1318027201-THM1.30 ppb
2018-02-1318027202-THM1.30 ppb
2018-02-1318027203-THM1.60 ppb
2018-02-1318027204-THM1.50 ppb
2018-05-0818059809-THM1.80 ppb
2018-05-0818059810-THM1.60 ppb
2018-05-0818059811-THM1.60 ppb
2018-05-0818059812-THM1.60 ppb
2018-05-0818059813-THM1.60 ppb
2018-05-0818059814-THM1.50 ppb
2018-05-0818059815-THM1.60 ppb
2018-05-0818059816-THM1.70 ppb
2018-08-1418083091-THM2.30 ppb
2018-08-1418083092-THM2.10 ppb
2018-08-1418083093-THM2.00 ppb
2018-08-1418083094-THM2.00 ppb
2018-08-1418083095-THM2.20 ppb
2018-08-1418083096-THM2.10 ppb
2018-08-1418083097-THM2.30 ppb
2018-08-1418083098-THM2.30 ppb
2018-11-1318115959-THM1.50 ppb
2018-11-1318115960-THM1.10 ppb
2018-11-1318115961-THM1.10 ppb
2018-11-1318115962-THM1.10 ppb
2018-11-1318115963-THM1.20 ppb
2018-11-1318115964-THM1.20 ppb
2018-11-1318115965-THM1.10 ppb
2018-11-1318115966-THM1.20 ppb
2019-02-1219028718-THM1.40 ppb
2019-02-1219028719-THM1.000 ppb
2019-02-1219028720-THM1.000 ppb
2019-02-1219028721-THM1.10 ppb
2019-02-1219028722-THM1.000 ppb
2019-02-1219028723-THM1.000 ppb
2019-02-1219028724-THM1.20 ppb
2019-02-1219028725-THM1.20 ppb
2019-05-1419052465-THM1.20 ppb
2019-05-1419052466-THM1.10 ppb
2019-05-1419052467-THM1.000 ppb
2019-05-1419052468-THM1.10 ppb
2019-05-1419052469-THM1.20 ppb
2019-05-1419052470-THM1.10 ppb
2019-05-1419052471-THM1.20 ppb
2019-05-1419052472-THM1.10 ppb
2019-08-1319085333-THM1.70 ppb
2019-08-1319085334-THM1.70 ppb
2019-08-1319085335-THM1.50 ppb
2019-08-1319085336-THM1.80 ppb
2019-08-1319085337-THM1.60 ppb
2019-08-1319085338-THM1.70 ppb
2019-08-1319085339-THM1.60 ppb
2019-08-1319085364-THM1.60 ppb
2019-11-1219118047-THM1.60 ppb
2019-11-1219118048-THM1.30 ppb
2019-11-1219118049-THM1.30 ppb
2019-11-1219118050-THM1.50 ppb
2019-11-1219118051-THM1.30 ppb
2019-11-1219118052-THM1.40 ppb
2019-11-1219118053-THM1.40 ppb
2019-11-1219118054-THM1.50 ppb