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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Herndon

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

 

96

Samples

0

Samples exceeding legal limit (MCL)

41

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.461 ppb169ND - 1.000 ppb
20150.521 ppb168ND - 1.12 ppb
20160.591 ppb169ND - 1.39 ppb
20170.737 ppb168ND - 2.52 ppb
20180.166 ppb164ND - 0.740 ppb
20190.145 ppb164ND - 0.620 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
2014-02-11FW14012205-02_THND
2014-02-11FW14012205-01_TH0.500 ppb
2014-02-11FW14012205-04_THND
2014-02-11FW14012205-03_THND
2014-05-06FW14050105-02_THND
2014-05-06FW14050105-03_THND
2014-05-06FW14050105-01_THND
2014-05-06FW14050105-04_THND
2014-08-12FW14072408-03_TH0.820 ppb
2014-08-12FW14072408-01_TH0.780 ppb
2014-08-12FW14072408-04_TH0.760 ppb
2014-08-12FW14072408-02_TH0.730 ppb
2014-11-12FW141016008-04_T0.950 ppb
2014-11-12FW141016008-02_T1.000 ppb
2014-11-12FW141016008-01_T0.940 ppb
2014-11-12FW141016008-03_T0.900 ppb
2015-02-1000125-FAIRFAX COND
2015-02-1000125-FAIRFAX COND
2015-02-1000125-FAIRFAX COND
2015-02-1000125-FAIRFAX COND
2015-05-1200125-FAIRFAX COND
2015-05-1200125-FAIRFAX COND
2015-05-1200125-FAIRFAX COND
2015-05-1200125-FAIRFAX COND
2015-08-1100125-FAIRFAX CO1.05 ppb
2015-08-1100125-FAIRFAX CO1.11 ppb
2015-08-1100125-FAIRFAX CO1.11 ppb
2015-08-1100125-FAIRFAX CO1.12 ppb
2015-11-1000125-FAIRFAX CO0.980 ppb
2015-11-1000125-FAIRFAX CO1.05 ppb
2015-11-1000125-FAIRFAX CO1.11 ppb
2015-11-1000125-FAIRFAX CO0.810 ppb
2016-02-09FW160121029-03_TND
2016-02-09FW160121029-02_TND
2016-02-09FW160121029-01_TND
2016-02-09FW160121029-04_TND
2016-05-11FW160422006-02_TND
2016-05-11FW160422006-01_T0.630 ppb
2016-05-11FW160422006-03_TND
2016-05-11FW160422006-04_TND
2016-08-09FW160718007-01_T1.39 ppb
2016-08-09FW160718007-04_T1.23 ppb
2016-08-09FW160718007-03_T1.37 ppb
2016-08-09FW160718007-02_T1.39 ppb
2016-11-08FW161013010-04_T0.940 ppb
2016-11-08FW161013010-02_T0.890 ppb
2016-11-08FW161013010-03_T1.000 ppb
2016-11-08FW161013010-01_T0.620 ppb
2017-02-07FW161018085-04_T0.620 ppb
2017-02-07FW161018085-02_T0.670 ppb
2017-02-07FW161018085-01_T0.810 ppb
2017-02-07FW161018085-03_T0.640 ppb
2017-05-09FW170414004-03_TND
2017-05-09FW170414004-04_TND
2017-05-09FW170414004-02_TND
2017-05-09FW170414004-01_TND
2017-08-08FW170629005-02_T2.52 ppb
2017-08-08FW170629005-04_T2.38 ppb
2017-08-08FW170629005-03_T2.33 ppb
2017-08-08FW170629005-01_T1.82 ppb
2017-11-07FW171013004-01_TND
2017-11-07FW171013004-02_TND
2017-11-07FW171013004-03_TND
2017-11-07FW171013004-04_TND
2018-02-06FW180111003-04_T0.590 ppb
2018-02-06FW180111003-03_T0.660 ppb
2018-02-06FW180111003-02_T0.670 ppb
2018-02-06FW180111003-01_T0.740 ppb
2018-05-08FW180419004-04_TND
2018-05-08FW180419004-01_TND
2018-05-08FW180419004-02_TND
2018-05-08FW180419004-03_TND
2018-08-07FW180716033-04_TND
2018-08-07FW180716033-03_TND
2018-08-07FW180716033-02_TND
2018-08-07FW180716033-01_TND
2018-11-07FW181023105-01_TND
2018-11-07FW181023105-02_TND
2018-11-07FW181023105-03_TND
2018-11-07FW181023105-04_TND
2019-02-12FW190114010-01_TND
2019-02-12FW190114010-02_TND
2019-02-12FW190114010-03_TND
2019-02-12FW190114010-04_TND
2019-05-07FW190422009-01_TND
2019-05-07FW190422009-04_TND
2019-05-07FW190422009-03_TND
2019-05-07FW190422009-02_TND
2019-08-08FW190726005-02_T0.560 ppb
2019-08-08FW190726005-04_T0.580 ppb
2019-08-08FW190726005-03_T0.620 ppb
2019-08-08FW190726005-01_T0.560 ppb
2019-11-12FW191027005-04_TND
2019-11-12FW191027005-03_TND
2019-11-12FW191027005-02_TND
2019-11-12FW191027005-01_TND