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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Hecla Water Association-Plant PWS

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)

61

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20142.15 ppb1612ND - 6.20 ppb
20151.58 ppb1610ND - 5.35 ppb
20162.12 ppb1610ND - 7.74 ppb
20172.14 ppb1613ND - 6.00 ppb
20181.32 ppb1610ND - 4.30 ppb
20191.41 ppb126ND - 5.80 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
2014-02-11A1401800202.90 ppb
2014-02-11A1401800191.70 ppb
2014-02-11A140180018ND
2014-02-11A140180017ND
2014-05-13A140191215ND
2014-05-13A140191214ND
2014-05-13A1401912174.70 ppb
2014-05-13A1401912162.20 ppb
2014-08-10A1402165954.40 ppb
2014-08-27A1402164641.50 ppb
2014-08-27A1402164600.950 ppb
2014-08-27A1402164610.940 ppb
2014-11-11A1402175215.40 ppb
2014-11-11A1402175221.80 ppb
2014-11-11A1402175236.20 ppb
2014-11-11A1402175241.70 ppb
2015-02-10A150231758ND
2015-02-10A1502317591.40 ppb
2015-02-10A1502317603.00 ppb
2015-02-10A150231757ND
2015-05-12A150285508ND
2015-05-12A150285509ND
2015-05-12A150285510ND
2015-05-12A1502855112.50 ppb
2015-08-11A1503199940.520 ppb
2015-08-11A1503199973.43 ppb
2015-08-11A150319996ND
2015-08-11A1503199950.570 ppb
2015-11-10A1503318382.12 ppb
2015-11-10A1503318372.22 ppb
2015-11-10A1503318365.35 ppb
2015-11-10A1503318394.12 ppb
2016-02-09A1603382644.77 ppb
2016-02-09A160338265ND
2016-02-09A160338374ND
2016-02-09A160338375ND
2016-05-10A160375053ND
2016-05-10A160375055ND
2016-05-10A160375054ND
2016-05-10A1603750523.53 ppb
2016-08-09A1604273031.99 ppb
2016-08-09A1604273043.34 ppb
2016-08-09A1604273051.97 ppb
2016-08-09A1604273066.14 ppb
2016-11-22A1604631707.74 ppb
2016-11-22A1604631690.530 ppb
2016-11-22A1604631673.40 ppb
2016-11-22A1604631680.570 ppb
2017-02-08A1704747661.01 ppb
2017-02-08A170474767ND
2017-02-08A1704747685.46 ppb
2017-02-08A170474769ND
2017-05-09A170498070ND
2017-05-09A1704980713.80 ppb
2017-06-13A1705046641.60 ppb
2017-06-13A1705046650.570 ppb
2017-08-08A1705166224.19 ppb
2017-08-08A1705168701.90 ppb
2017-08-08A1705168690.540 ppb
2017-08-08A1705166210.590 ppb
2017-11-07A1705482442.10 ppb
2017-11-07A1705482454.10 ppb
2017-11-07A1705482466.00 ppb
2017-11-07A1705482472.30 ppb
2018-02-13A1805705411.70 ppb
2018-02-13A1805705432.70 ppb
2018-02-13A180570542ND
2018-02-13A180570540ND
2018-05-08A180600423ND
2018-05-08A1806004241.10 ppb
2018-05-08A180600425ND
2018-05-08A1806004262.70 ppb
2018-08-07A1806319990.700 ppb
2018-08-07A1806320004.00 ppb
2018-08-07A1806320011.70 ppb
2018-08-07A1806320020.700 ppb
2018-11-138K01791-03ND
2018-11-138K01791-02ND
2018-11-138K01791-011.50 ppb
2018-11-138K01791-044.30 ppb
2019-02-129B01514-012.60 ppb
2019-02-129B01514-041.000 ppb
2019-02-129B01514-03ND
2019-02-129B01514-02ND
2019-05-089E01274-01ND
2019-05-089E01274-023.90 ppb
2019-05-089E01274-031.30 ppb
2019-05-089E01274-04ND
2019-08-139H02131-015.80 ppb
2019-08-139H02131-022.30 ppb
2019-08-139H02131-03ND
2019-08-139H02131-04ND