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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

City of Chesapeake - Northwest River System

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

 

116

Samples

0

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND10ND
20150.0636 ppb111ND - 0.700 ppb
2016ND100ND
2017ND340ND
2018ND340ND
20190.0692 ppb261ND - 1.80 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.5 ppb

The EWG Health Guideline of 0.5 ppb for bromoform 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
2014-12-09E140800085ND
2015-03-05VA010-DCLS0.700 ppb
2015-03-05VA010-DCLSND
2015-03-05VA010-DCLSND
2015-03-05VA010-DCLSND
2015-03-05VA010-DCLSND
2015-03-05VA010-DCLSND
2015-03-05VA010-DCLSND
2015-03-05VA010-DCLSND
2015-04-06VA010-DCLSND
2015-08-18VA010-DCLSND
2015-10-28VA010-DCLSND
2016-04-18E160302045ND
2016-11-15E161000243ND
2016-12-0516-21872-THMND
2016-12-0516-21873-THMND
2016-12-0516-21866-THMND
2016-12-0516-21867-THMND
2016-12-0516-21870-THMND
2016-12-0516-21868-THMND
2016-12-0516-21869-THMND
2016-12-0516-21871-THMND
2017-03-0617-04078-THMND
2017-03-0617-04079-THMND
2017-03-0617-04080-THMND
2017-03-0617-04081-THMND
2017-03-0617-04082-THMND
2017-03-0617-04075-THMND
2017-03-0617-04076-THMND
2017-03-0617-04077-THMND
2017-04-25E170307529ND
2017-06-0517-09886-THMND
2017-06-0517-09887-THMND
2017-06-0517-09888-THMND
2017-06-0517-09883-THMND
2017-06-0517-09884-THMND
2017-06-0517-09885-THMND
2017-06-0517-09889-THMND
2017-06-0517-09890-THMND
2017-09-0517-16192-THMND
2017-09-0517-16193-THMND
2017-09-0517-16186-THMND
2017-09-0517-16187-THMND
2017-09-0517-16188-THMND
2017-09-0517-16189-THMND
2017-09-0517-16190-THMND
2017-09-0517-16191-THMND
2017-11-13E170906613ND
2017-12-04217340-39ND
2017-12-04217340-40ND
2017-12-04217340-41ND
2017-12-04217340-42ND
2017-12-04217340-43ND
2017-12-04217340-44ND
2017-12-04217340-45ND
2017-12-04217340-46ND
2018-03-05218066-21ND
2018-03-05218066-22ND
2018-03-05218066-23ND
2018-03-05218066-24ND
2018-03-05218066-25ND
2018-03-05218066-26ND
2018-03-05218066-27ND
2018-03-05218066-28ND
2018-06-04218157-11ND
2018-06-04218157-12ND
2018-06-04218157-13ND
2018-06-04218157-14ND
2018-06-04218157-15ND
2018-06-04218157-16ND
2018-06-04218157-17ND
2018-06-04218157-18ND
2018-06-12E180602859ND
2018-09-0418100910-05ND
2018-09-0418100910-06ND
2018-09-0418100910-07ND
2018-09-0418100910-08ND
2018-09-0418100910-09ND
2018-09-0418100910-10ND
2018-09-0418100910-11ND
2018-09-0418100910-12ND
2018-11-05E181000457ND
2018-12-0318120506-01ND
2018-12-0318120506-02ND
2018-12-0318120506-03ND
2018-12-0318120506-04ND
2018-12-0318120506-05ND
2018-12-0318120506-06ND
2018-12-0318120506-07ND
2018-12-0318120506-08ND
2019-03-0419030511-01TND
2019-03-0419030511-02TND
2019-03-0419030511-03TND
2019-03-0419030511-04TND
2019-03-0419030511-05TND
2019-03-0419030511-06TND
2019-03-0419030511-07TND
2019-03-0419030511-08TND
2019-05-13E190307955ND
2019-09-0319090401-01TND
2019-09-0319090401-02TND
2019-09-0319090401-03TND
2019-09-0319090401-04TND
2019-09-0319090401-05TND
2019-09-0319090401-06TND
2019-09-0319090401-07TND
2019-09-0319090401-08TND
2019-11-05E191004164ND
2019-12-0219120301-01TND
2019-12-0219120301-02TND
2019-12-0219120301-03TND
2019-12-0219120301-04TND
2019-12-0219120301-05TND
2019-12-0219120301-07T1.80 ppb
2019-12-0219120301-08TND
2019-12-02191220301-06TND