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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Newton Water Supply

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

 

26

Samples

0

Samples exceeding legal limit (MCL)

19

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.988 ppb169ND - 3.91 ppb
20151.27 ppb221.16 ppb - 1.38 ppb
20162.11 ppb221.30 ppb - 2.91 ppb
20171.04 ppb220.880 ppb - 1.19 ppb
20183.60 ppb223.03 ppb - 4.16 ppb
20192.28 ppb222.15 ppb - 2.40 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
2014-01-1620293360.760 ppb
2014-01-1620293350.850 ppb
2014-01-1620293340.680 ppb
2014-01-1620293330.680 ppb
2014-04-1420471022.83 ppb
2014-04-1420471013.91 ppb
2014-04-1420471002.47 ppb
2014-04-1420470993.04 ppb
2014-07-222066368ND
2014-07-222066370ND
2014-07-2220663690.590 ppb
2014-07-222066367ND
2014-10-162087605ND
2014-10-162087604ND
2014-10-162087603ND
2014-10-162087606ND
2015-07-061G50246-021.16 ppb
2015-07-061G50246-011.38 ppb
2016-07-071G60331-012.91 ppb
2016-07-071G60331-021.30 ppb
2017-07-111G70586-020.880 ppb
2017-07-111G70586-011.19 ppb
2018-07-101G80572-014.16 ppb
2018-07-101G80572-023.03 ppb
2019-07-101G90885-012.40 ppb
2019-07-101G90885-022.15 ppb