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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Sudbury Water District

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

 

374

Samples

0

Samples exceeding legal limit (MCL)

60

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND400ND
2015ND640ND
20160.193 ppb588ND - 2.20 ppb
20170.250 ppb6612ND - 3.10 ppb
20180.267 ppb7612ND - 2.60 ppb
20190.415 ppb7028ND - 1.60 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
2014-01-07ND
2014-01-07ND
2014-01-07ND
2014-01-07ND
2014-01-07ND
2014-01-07ND
2014-01-07ND
2014-01-07ND
2014-05-06ND
2014-05-06ND
2014-05-06ND
2014-05-06ND
2014-05-06ND
2014-05-06ND
2014-05-06ND
2014-05-06ND
2014-07-08ND
2014-07-08ND
2014-07-08ND
2014-07-08ND
2014-07-08ND
2014-07-08ND
2014-07-08ND
2014-07-08ND
2014-07-08ND
2014-07-08ND
2014-07-08ND
2014-07-08ND
2014-07-23ND
2014-07-23ND
2014-07-23ND
2014-07-23ND
2014-10-21ND
2014-10-21ND
2014-10-21ND
2014-10-21ND
2014-10-21ND
2014-10-21ND
2014-10-21ND
2014-10-21ND
2015-01-06ND
2015-01-06ND
2015-01-06ND
2015-01-06ND
2015-01-06ND
2015-01-06ND
2015-01-06ND
2015-01-06ND
2015-02-03ND
2015-02-03ND
2015-02-03ND
2015-02-03ND
2015-02-03ND
2015-02-03ND
2015-02-03ND
2015-02-03ND
2015-04-16ND
2015-04-16ND
2015-04-22ND
2015-04-22ND
2015-04-22ND
2015-04-22ND
2015-04-22ND
2015-04-22ND
2015-04-22ND
2015-04-22ND
2015-05-05ND
2015-05-05ND
2015-05-05ND
2015-05-05ND
2015-05-05ND
2015-05-05ND
2015-05-05ND
2015-05-05ND
2015-07-07ND
2015-07-07ND
2015-07-07ND
2015-07-07ND
2015-07-07ND
2015-07-07ND
2015-07-07ND
2015-07-07ND
2015-07-07ND
2015-07-07ND
2015-07-07ND
2015-07-07ND
2015-08-04ND
2015-08-04ND
2015-08-04ND
2015-08-04ND
2015-08-04ND
2015-08-04ND
2015-08-04ND
2015-08-04ND
2015-10-06ND
2015-10-06ND
2015-11-03ND
2015-11-03ND
2015-11-03ND
2015-11-03ND
2015-11-03ND
2015-11-03ND
2015-11-03ND
2015-11-03ND
2016-01-05ND
2016-01-05ND
2016-02-021.30 ppb
2016-02-021.30 ppb
2016-02-021.000 ppb
2016-02-021.000 ppb
2016-02-02ND
2016-02-02ND
2016-02-02ND
2016-02-02ND
2016-03-15ND
2016-03-15ND
2016-03-15ND
2016-03-15ND
2016-04-06ND
2016-04-06ND
2016-04-06ND
2016-04-06ND
2016-05-03ND
2016-05-03ND
2016-05-03ND
2016-05-03ND
2016-05-031.10 ppb
2016-05-031.10 ppb
2016-05-03ND
2016-05-03ND
2016-07-12ND
2016-07-12ND
2016-07-12ND
2016-07-12ND
2016-07-12ND
2016-07-12ND
2016-07-12ND
2016-07-12ND
2016-07-12ND
2016-07-12ND
2016-07-12ND
2016-07-12ND
2016-08-02ND
2016-08-02ND
2016-08-022.20 ppb
2016-08-022.20 ppb
2016-08-02ND
2016-08-02ND
2016-08-02ND
2016-08-02ND
2016-10-04ND
2016-10-04ND
2016-10-04ND
2016-10-04ND
2016-11-08ND
2016-11-08ND
2016-11-08ND
2016-11-08ND
2016-11-08ND
2016-11-08ND
2016-11-08ND
2016-11-08ND
2017-01-10ND
2017-01-10ND
2017-01-10ND
2017-01-10ND
2017-01-10ND
2017-01-10ND
2017-01-10ND
2017-01-10ND
2017-02-07ND
2017-02-07ND
2017-02-07ND
2017-02-07ND
2017-02-07ND
2017-02-07ND
2017-02-07ND
2017-02-07ND
2017-04-04ND
2017-04-04ND
2017-04-04ND
2017-04-04ND
2017-04-04ND
2017-04-04ND
2017-05-023.10 ppb
2017-05-023.10 ppb
2017-05-02ND
2017-05-02ND
2017-05-02ND
2017-05-02ND
2017-05-02ND
2017-05-02ND
2017-07-11ND
2017-07-11ND
2017-07-11ND
2017-07-11ND
2017-07-11ND
2017-07-11ND
2017-07-110.730 ppb
2017-07-110.730 ppb
2017-07-11ND
2017-07-11ND
2017-07-110.620 ppb
2017-07-110.620 ppb
2017-08-08ND
2017-08-08ND
2017-08-081.000 ppb
2017-08-081.000 ppb
2017-08-081.50 ppb
2017-08-081.50 ppb
2017-08-08ND
2017-08-08ND
2017-10-03ND
2017-10-03ND
2017-10-03ND
2017-10-03ND
2017-10-03ND
2017-10-03ND
2017-10-03ND
2017-10-03ND
2017-11-081.30 ppb
2017-11-081.30 ppb
2017-11-08ND
2017-11-08ND
2017-11-08ND
2017-11-08ND
2017-11-08ND
2017-11-08ND
2018-02-06ND
2018-02-06ND
2018-02-061.60 ppb
2018-02-061.60 ppb
2018-02-06ND
2018-02-06ND
2018-02-06ND
2018-02-06ND
2018-02-06ND
2018-02-06ND
2018-02-06ND
2018-02-06ND
2018-02-06ND
2018-02-06ND
2018-04-10ND
2018-04-10ND
2018-04-10ND
2018-04-10ND
2018-04-10ND
2018-04-10ND
2018-04-10ND
2018-04-10ND
2018-05-02ND
2018-05-02ND
2018-05-02ND
2018-05-02ND
2018-05-02ND
2018-05-02ND
2018-05-02ND
2018-05-02ND
2018-07-10ND
2018-07-10ND
2018-07-10ND
2018-07-10ND
2018-07-10ND
2018-07-10ND
2018-07-10ND
2018-07-10ND
2018-07-10ND
2018-07-10ND
2018-07-10ND
2018-07-10ND
2018-07-10ND
2018-07-10ND
2018-07-10ND
2018-07-10ND
2018-07-10ND
2018-07-10ND
2018-07-100.660 ppb
2018-07-100.660 ppb
2018-08-082.00 ppb
2018-08-082.00 ppb
2018-08-08ND
2018-08-08ND
2018-08-081.50 ppb
2018-08-081.50 ppb
2018-08-08ND
2018-08-08ND
2018-08-172.60 ppb
2018-08-172.60 ppb
2018-10-10ND
2018-10-10ND
2018-10-10ND
2018-10-10ND
2018-10-10ND
2018-10-10ND
2018-10-10ND
2018-10-10ND
2018-11-061.80 ppb
2018-11-061.80 ppb
2018-11-06ND
2018-11-06ND
2018-11-06ND
2018-11-06ND
2018-11-06ND
2018-11-06ND
2019-01-08ND
2019-01-08ND
2019-01-08ND
2019-01-08ND
2019-01-08ND
2019-01-08ND
2019-02-071.30 ppb
2019-02-071.30 ppb
2019-02-071.40 ppb
2019-02-071.40 ppb
2019-02-071.10 ppb
2019-02-071.10 ppb
2019-02-07ND
2019-02-07ND
2019-04-02ND
2019-04-02ND
2019-04-020.610 ppb
2019-04-020.610 ppb
2019-04-02ND
2019-04-02ND
2019-05-091.60 ppb
2019-05-091.60 ppb
2019-05-091.40 ppb
2019-05-091.40 ppb
2019-05-091.30 ppb
2019-05-091.30 ppb
2019-05-091.40 ppb
2019-05-091.40 ppb
2019-07-02ND
2019-07-02ND
2019-07-02ND
2019-07-02ND
2019-07-02ND
2019-07-02ND
2019-07-02ND
2019-07-02ND
2019-07-02ND
2019-07-02ND
2019-07-02ND
2019-07-02ND
2019-07-02ND
2019-07-02ND
2019-07-020.530 ppb
2019-07-020.530 ppb
2019-07-16ND
2019-07-16ND
2019-08-081.40 ppb
2019-08-081.40 ppb
2019-08-08ND
2019-08-08ND
2019-08-08ND
2019-08-08ND
2019-08-08ND
2019-08-08ND
2019-10-08ND
2019-10-08ND
2019-10-08ND
2019-10-08ND
2019-10-08ND
2019-10-08ND
2019-10-08ND
2019-10-08ND
2019-11-070.550 ppb
2019-11-070.550 ppb
2019-11-070.700 ppb
2019-11-070.700 ppb
2019-11-070.640 ppb
2019-11-070.640 ppb
2019-11-070.590 ppb
2019-11-070.590 ppb