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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Hyannis Water System

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

 

264

Samples

0

Samples exceeding legal limit (MCL)

160

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.330 ppb208ND - 1.20 ppb
20150.642 ppb5230ND - 2.00 ppb
20160.854 ppb6038ND - 2.30 ppb
20170.996 ppb4634ND - 2.20 ppb
20180.731 ppb4422ND - 2.90 ppb
20190.825 ppb4232ND - 1.70 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
2014-02-111.000 ppb
2014-02-111.000 ppb
2014-04-08ND
2014-04-08ND
2014-07-15ND
2014-07-15ND
2014-07-15ND
2014-07-15ND
2014-07-15ND
2014-07-15ND
2014-07-15ND
2014-07-15ND
2014-07-15ND
2014-07-15ND
2014-07-151.20 ppb
2014-07-151.20 ppb
2014-07-150.500 ppb
2014-07-150.500 ppb
2014-10-150.600 ppb
2014-10-150.600 ppb
2015-01-130.600 ppb
2015-01-130.600 ppb
2015-02-101.20 ppb
2015-02-101.20 ppb
2015-02-100.900 ppb
2015-02-100.900 ppb
2015-02-101.20 ppb
2015-02-101.20 ppb
2015-02-101.10 ppb
2015-02-101.10 ppb
2015-04-210.600 ppb
2015-04-210.600 ppb
2015-05-121.10 ppb
2015-05-121.10 ppb
2015-05-12ND
2015-05-12ND
2015-05-121.10 ppb
2015-05-121.10 ppb
2015-05-121.40 ppb
2015-05-121.40 ppb
2015-07-14ND
2015-07-14ND
2015-07-14ND
2015-07-14ND
2015-07-14ND
2015-07-14ND
2015-07-14ND
2015-07-14ND
2015-07-14ND
2015-07-14ND
2015-07-141.000 ppb
2015-07-141.000 ppb
2015-07-140.700 ppb
2015-07-140.700 ppb
2015-08-11ND
2015-08-11ND
2015-08-11ND
2015-08-11ND
2015-08-11ND
2015-08-11ND
2015-08-11ND
2015-08-11ND
2015-11-030.790 ppb
2015-11-030.790 ppb
2015-11-101.80 ppb
2015-11-101.80 ppb
2015-11-101.20 ppb
2015-11-101.20 ppb
2015-11-102.00 ppb
2015-11-102.00 ppb
2015-11-10ND
2015-11-10ND
2016-01-141.000 ppb
2016-01-141.000 ppb
2016-02-092.20 ppb
2016-02-092.20 ppb
2016-02-09ND
2016-02-09ND
2016-02-092.30 ppb
2016-02-092.30 ppb
2016-02-091.30 ppb
2016-02-091.30 ppb
2016-04-130.560 ppb
2016-04-130.560 ppb
2016-05-101.40 ppb
2016-05-101.40 ppb
2016-05-102.20 ppb
2016-05-102.20 ppb
2016-05-101.40 ppb
2016-05-101.40 ppb
2016-05-10ND
2016-05-10ND
2016-06-080.760 ppb
2016-06-080.760 ppb
2016-06-080.850 ppb
2016-06-080.850 ppb
2016-06-29ND
2016-06-29ND
2016-07-19ND
2016-07-19ND
2016-07-191.10 ppb
2016-07-191.10 ppb
2016-07-191.000 ppb
2016-07-191.000 ppb
2016-07-19ND
2016-07-19ND
2016-07-191.60 ppb
2016-07-191.60 ppb
2016-07-19ND
2016-07-19ND
2016-07-190.550 ppb
2016-07-190.550 ppb
2016-07-19ND
2016-07-19ND
2016-08-10ND
2016-08-10ND
2016-08-10ND
2016-08-10ND
2016-08-101.30 ppb
2016-08-101.30 ppb
2016-08-101.40 ppb
2016-08-101.40 ppb
2016-10-110.800 ppb
2016-10-110.800 ppb
2016-11-231.70 ppb
2016-11-231.70 ppb
2016-11-23ND
2016-11-23ND
2016-11-232.20 ppb
2016-11-232.20 ppb
2016-11-23ND
2016-11-23ND
2017-01-19ND
2017-01-19ND
2017-02-021.60 ppb
2017-02-021.60 ppb
2017-02-021.000 ppb
2017-02-021.000 ppb
2017-02-021.70 ppb
2017-02-021.70 ppb
2017-02-02ND
2017-02-02ND
2017-04-191.50 ppb
2017-04-191.50 ppb
2017-04-191.50 ppb
2017-04-191.50 ppb
2017-05-092.00 ppb
2017-05-092.00 ppb
2017-05-091.40 ppb
2017-05-091.40 ppb
2017-05-091.60 ppb
2017-05-091.60 ppb
2017-05-09ND
2017-05-09ND
2017-07-120.540 ppb
2017-07-120.540 ppb
2017-07-12ND
2017-07-12ND
2017-07-120.680 ppb
2017-07-120.680 ppb
2017-08-081.20 ppb
2017-08-081.20 ppb
2017-08-08ND
2017-08-08ND
2017-08-081.40 ppb
2017-08-081.40 ppb
2017-08-08ND
2017-08-08ND
2017-10-180.980 ppb
2017-10-180.980 ppb
2017-11-141.10 ppb
2017-11-141.10 ppb
2017-11-142.20 ppb
2017-11-142.20 ppb
2017-11-141.20 ppb
2017-11-141.20 ppb
2017-11-141.30 ppb
2017-11-141.30 ppb
2018-01-090.940 ppb
2018-01-090.940 ppb
2018-02-132.20 ppb
2018-02-132.20 ppb
2018-02-13ND
2018-02-13ND
2018-02-13ND
2018-02-13ND
2018-02-13ND
2018-02-13ND
2018-05-031.50 ppb
2018-05-031.50 ppb
2018-05-152.90 ppb
2018-05-152.90 ppb
2018-05-152.10 ppb
2018-05-152.10 ppb
2018-05-151.60 ppb
2018-05-151.60 ppb
2018-05-15ND
2018-05-15ND
2018-07-170.500 ppb
2018-07-170.500 ppb
2018-07-17ND
2018-07-17ND
2018-07-17ND
2018-07-17ND
2018-08-071.10 ppb
2018-08-071.10 ppb
2018-08-07ND
2018-08-07ND
2018-08-071.60 ppb
2018-08-071.60 ppb
2018-08-07ND
2018-08-07ND
2018-10-230.540 ppb
2018-10-230.540 ppb
2018-11-131.10 ppb
2018-11-131.10 ppb
2018-11-13ND
2018-11-13ND
2018-11-13ND
2018-11-13ND
2018-11-13ND
2018-11-13ND
2019-01-090.660 ppb
2019-01-090.660 ppb
2019-02-061.20 ppb
2019-02-061.20 ppb
2019-02-06ND
2019-02-06ND
2019-02-061.30 ppb
2019-02-061.30 ppb
2019-02-06ND
2019-02-06ND
2019-04-110.710 ppb
2019-04-110.710 ppb
2019-05-081.40 ppb
2019-05-081.40 ppb
2019-05-080.980 ppb
2019-05-080.980 ppb
2019-08-091.70 ppb
2019-08-091.70 ppb
2019-08-091.000 ppb
2019-08-091.000 ppb
2019-08-091.70 ppb
2019-08-091.70 ppb
2019-08-09ND
2019-08-09ND
2019-08-09ND
2019-08-09ND
2019-08-091.20 ppb
2019-08-091.20 ppb
2019-08-090.670 ppb
2019-08-090.670 ppb
2019-10-080.800 ppb
2019-10-080.800 ppb
2019-10-080.950 ppb
2019-10-080.950 ppb
2019-11-071.10 ppb
2019-11-071.10 ppb
2019-11-071.40 ppb
2019-11-071.40 ppb
2019-11-070.560 ppb
2019-11-070.560 ppb
2019-11-07ND
2019-11-07ND