Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Bromoform

Jefferson County W and S District - M

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

 

92

Samples

0

Samples exceeding legal limit (MCL)

55

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.648 ppb168ND - 1.70 ppb
20152.66 ppb16161.20 ppb - 6.04 ppb
20161.97 ppb1615ND - 5.71 ppb
20170.953 ppb168ND - 3.20 ppb
20180.638 ppb164ND - 3.20 ppb
20191.10 ppb126ND - 3.20 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
2014-03-04A140183135ND
2014-03-04A140183134ND
2014-03-04A140183133ND
2014-03-04A140183132ND
2014-06-03A140191440ND
2014-06-03A140191439ND
2014-06-03A140191442ND
2014-06-03A140191441ND
2014-09-02A1402167280.890 ppb
2014-09-02A1402167260.870 ppb
2014-09-02A1402167291.20 ppb
2014-09-02A1402167271.10 ppb
2014-12-02A1402176491.70 ppb
2014-12-02A1402176501.70 ppb
2014-12-02A1402176511.70 ppb
2014-12-03A1402176521.20 ppb
2015-03-03A1502320551.20 ppb
2015-03-03A1502320561.20 ppb
2015-03-03A1502320571.50 ppb
2015-03-03A1502320541.30 ppb
2015-06-02A1503043373.20 ppb
2015-06-02A1503043382.40 ppb
2015-06-02A1503043392.70 ppb
2015-06-02A1503043402.90 ppb
2015-09-01A1503043314.19 ppb
2015-09-01A1503199145.44 ppb
2015-09-01A1503199136.04 ppb
2015-09-01A1503199124.29 ppb
2015-12-01A1503286101.55 ppb
2015-12-01A1503286091.52 ppb
2015-12-01A1503286081.56 ppb
2015-12-02A1503286111.51 ppb
2016-03-01A1603320110.560 ppb
2016-03-01A1603320120.500 ppb
2016-03-01A160332013ND
2016-03-01A1603320140.510 ppb
2016-06-03A1603383850.800 ppb
2016-06-03A1603383870.870 ppb
2016-06-03A1603383860.800 ppb
2016-06-03A1603383840.870 ppb
2016-09-05A1603993054.98 ppb
2016-09-05A1603993064.34 ppb
2016-09-05A1603993074.99 ppb
2016-09-05A1600742535.71 ppb
2016-12-06A1604472831.58 ppb
2016-12-06A1604472821.75 ppb
2016-12-06A1604472801.49 ppb
2016-12-06A1604472811.75 ppb
2017-03-06A1704631770.600 ppb
2017-03-06A170463178ND
2017-03-06A170463179ND
2017-03-06A170463180ND
2017-06-05A170487473ND
2017-06-05A1704874720.870 ppb
2017-06-05A1704874711.01 ppb
2017-06-05A1704874680.970 ppb
2017-09-01A1704874742.70 ppb
2017-09-01A1704874752.90 ppb
2017-09-01A1703200443.00 ppb
2017-09-05A1703200453.20 ppb
2017-12-04A170539986ND
2017-12-04A170539987ND
2017-12-04A170539988ND
2017-12-04A170539989ND
2018-03-05A180539992ND
2018-03-05A180570965ND
2018-03-05A180570964ND
2018-03-05A180539991ND
2018-06-05A180600549ND
2018-06-05A180600550ND
2018-06-05A180600551ND
2018-06-05A180600552ND
2018-09-04A1806217813.20 ppb
2018-09-04A1806217822.20 ppb
2018-09-04A1806217832.30 ppb
2018-09-05A1806217792.50 ppb
2018-12-048L00365-03ND
2018-12-048L00365-02ND
2018-12-048L00365-01ND
2018-12-048L00365-04ND
2019-03-049C00747-01ND
2019-03-049C00747-04ND
2019-03-049C00747-03ND
2019-03-049C00747-02ND
2019-06-039F00553-01ND
2019-06-039F00553-02ND
2019-06-039F00553-030.500 ppb
2019-06-039F00553-040.600 ppb
2019-09-039I00376-022.80 ppb
2019-09-039I00376-033.10 ppb
2019-09-039I00376-043.20 ppb
2019-09-049I00376-013.00 ppb