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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Shrewsbury Water Department

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

 

144

Samples

0

Samples exceeding legal limit (MCL)

68

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.241 ppb228ND - 0.840 ppb
20151.18 ppb3220ND - 3.70 ppb
20160.673 ppb268ND - 4.40 ppb
20170.738 ppb880.520 ppb - 1.000 ppb
20180.849 ppb2812ND - 4.50 ppb
20191.01 ppb2812ND - 6.23 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 Result
2014-02-240.600 ppb
2014-02-240.600 ppb
2014-05-060.530 ppb
2014-05-060.530 ppb
2014-09-030.680 ppb
2014-09-030.680 ppb
2014-09-03ND
2014-09-03ND
2014-09-03ND
2014-09-03ND
2014-09-03ND
2014-09-03ND
2014-09-03ND
2014-09-03ND
2014-09-03ND
2014-09-03ND
2014-09-03ND
2014-09-03ND
2014-09-03ND
2014-09-03ND
2014-11-060.840 ppb
2014-11-060.840 ppb
2015-02-112.40 ppb
2015-02-112.40 ppb
2015-02-113.00 ppb
2015-02-113.00 ppb
2015-02-112.60 ppb
2015-02-112.60 ppb
2015-02-112.20 ppb
2015-02-112.20 ppb
2015-02-110.660 ppb
2015-02-110.660 ppb
2015-05-130.570 ppb
2015-05-130.570 ppb
2015-08-113.70 ppb
2015-08-113.70 ppb
2015-08-112.60 ppb
2015-08-112.60 ppb
2015-09-020.520 ppb
2015-09-020.520 ppb
2015-09-02ND
2015-09-02ND
2015-09-02ND
2015-09-02ND
2015-09-02ND
2015-09-02ND
2015-09-02ND
2015-09-02ND
2015-09-02ND
2015-09-02ND
2015-09-02ND
2015-09-02ND
2015-11-300.550 ppb
2015-11-300.550 ppb
2016-02-190.650 ppb
2016-02-190.650 ppb
2016-04-14ND
2016-04-14ND
2016-07-13ND
2016-07-13ND
2016-07-13ND
2016-07-13ND
2016-07-13ND
2016-07-13ND
2016-07-13ND
2016-07-13ND
2016-07-13ND
2016-07-13ND
2016-07-13ND
2016-07-13ND
2016-07-13ND
2016-07-13ND
2016-07-13ND
2016-07-13ND
2016-08-104.40 ppb
2016-08-104.40 ppb
2016-08-103.00 ppb
2016-08-103.00 ppb
2016-10-250.700 ppb
2016-10-250.700 ppb
2017-02-280.520 ppb
2017-02-280.520 ppb
2017-05-040.650 ppb
2017-05-040.650 ppb
2017-09-060.780 ppb
2017-09-060.780 ppb
2017-12-151.000 ppb
2017-12-151.000 ppb
2018-03-060.800 ppb
2018-03-060.800 ppb
2018-05-101.01 ppb
2018-05-101.01 ppb
2018-07-260.650 ppb
2018-07-260.650 ppb
2018-07-26ND
2018-07-26ND
2018-07-26ND
2018-07-26ND
2018-07-26ND
2018-07-26ND
2018-07-26ND
2018-07-26ND
2018-07-26ND
2018-07-26ND
2018-07-26ND
2018-07-26ND
2018-07-26ND
2018-07-26ND
2018-08-084.50 ppb
2018-08-084.50 ppb
2018-08-084.20 ppb
2018-08-084.20 ppb
2018-08-21ND
2018-08-21ND
2018-12-050.720 ppb
2018-12-050.720 ppb
2019-03-250.950 ppb
2019-03-250.950 ppb
2019-05-161.19 ppb
2019-05-161.19 ppb
2019-08-140.600 ppb
2019-08-140.600 ppb
2019-08-14ND
2019-08-14ND
2019-08-14ND
2019-08-14ND
2019-08-14ND
2019-08-14ND
2019-08-14ND
2019-08-14ND
2019-08-14ND
2019-08-14ND
2019-08-14ND
2019-08-14ND
2019-08-14ND
2019-08-14ND
2019-08-14ND
2019-08-14ND
2019-08-156.23 ppb
2019-08-156.23 ppb
2019-08-154.26 ppb
2019-08-154.26 ppb
2019-10-160.920 ppb
2019-10-160.920 ppb