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EWG's Tap Water Database — 2019 UPDATE

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Bromoform

Marshall Waterworks

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.

 

51

Samples

0

Samples exceeding legal limit (MCL)

20

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.833 ppb32ND - 1.90 ppb
20130.853 ppb1510ND - 2.30 ppb
20140.760 ppb105ND - 2.80 ppb
20151.000 ppb220.500 ppb - 1.50 ppb
20160.150 ppb101ND - 1.50 ppb
20172.01 ppb114ND - 9.20 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
2012-07-31E1205030250.600 ppb
2012-07-31E1205030231.90 ppb
2012-11-27E121000008ND
2013-01-23E1211053010.500 ppb
2013-01-23E1211053040.500 ppb
2013-04-30E1302023360.600 ppb
2013-04-30E1302023382.20 ppb
2013-07-16E1305057982.30 ppb
2013-07-16E1305058052.00 ppb
2013-07-16E1305058080.800 ppb
2013-07-16E1305058021.000 ppb
2013-08-12E130800798ND
2013-08-12E130800799ND
2013-08-30E130804753ND
2013-08-30E130804741ND
2013-08-30E130804729ND
2013-10-07E1308038450.800 ppb
2013-10-07E1308038402.10 ppb
2014-01-14E131200005ND
2014-02-10E141204239ND
2014-04-07E1403042390.500 ppb
2014-07-08E140601326ND
2014-07-08E1406013321.90 ppb
2014-07-08E1406013251.60 ppb
2014-07-16E140601331ND
2014-07-16E1403042372.80 ppb
2014-10-28E1408023980.800 ppb
2014-10-28E140802403ND
2015-07-14VA010-DCLS1.50 ppb
2015-07-14VA010-DCLS0.500 ppb
2016-02-10E151204275ND
2016-02-10E151204276ND
2016-05-11E160303031ND
2016-05-11E160303032ND
2016-07-19E1607030771.50 ppb
2016-07-19E160703073ND
2016-07-19E160703075ND
2016-07-19E160703076ND
2016-12-01E160901673ND
2016-12-01E160901674ND
2017-02-28E161201878ND
2017-02-28E161201879ND
2017-06-20E170302823ND
2017-06-20E1703028229.20 ppb
2017-07-11E170600338ND
2017-08-29E1706003411.20 ppb
2017-08-30E1706003335.20 ppb
2017-08-30E170600340ND
2017-08-30E170600336ND
2017-12-06E1708055086.50 ppb
2017-12-06E170805503ND