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EWG's Tap Water Database — 2019 UPDATE

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Bromoform

Port Washington 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.

 

43

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.175 ppb41ND - 0.700 ppb
2013ND50ND
2014ND90ND
2015ND80ND
20160.188 ppb84ND - 0.400 ppb
20170.367 ppb990.300 ppb - 0.500 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
2012-01-162576834-35ND
2012-04-252630423-24ND
2012-07-312685237-380.700 ppb
2012-12-042749134-35ND
2013-01-302772271-72ND
2013-04-222812712-13ND
2013-08-072872825-26ND
2013-10-092910729-30ND
2013-10-092910727-28ND
2014-01-072954185-86ND
2014-01-072954183-84ND
2014-04-083004512,14ND
2014-04-083004511,13ND
2014-04-213012243ND
2014-07-083058535-36ND
2014-07-083058537-38ND
2014-10-063117873,75ND
2014-10-063117872,74ND
2015-01-123167943,46ND
2015-01-123167944,47ND
2015-04-073219918-19ND
2015-04-073219916-17ND
2015-07-063274034-35ND
2015-07-063274036-37ND
2015-10-063336328-29ND
2015-10-063336330-31ND
2016-01-143386257,59ND
2016-01-143386258,60ND
2016-04-063426435-36ND
2016-04-063426433-34ND
2016-07-113490596-970.400 ppb
2016-07-113490594-950.400 ppb
2016-10-033558696-970.300 ppb
2016-10-033558694-950.400 ppb
2017-01-103619831-320.500 ppb
2017-01-103619833-340.400 ppb
2017-04-1936781600.300 ppb
2017-04-243682199-2000.300 ppb
2017-04-243682201-020.300 ppb
2017-07-053726745-460.300 ppb
2017-07-053726743-440.300 ppb
2017-10-093796074-750.400 ppb
2017-10-093796072-730.500 ppb