Bromoform
Westborough 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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | 0.0833 ppb | 24 | 2 | ND - 1.000 ppb |
2015 | 0.0483 ppb | 58 | 4 | ND - 0.900 ppb |
2016 | 0.0821 ppb | 56 | 4 | ND - 1.20 ppb |
2017 | 0.449 ppb | 60 | 22 | ND - 1.80 ppb |
2018 | 0.0853 ppb | 64 | 6 | ND - 1.10 ppb |
2019 | 0.179 ppb | 38 | 8 | ND - 1.10 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 |
---|---|
2014-05-21 | ND |
2014-05-21 | ND |
2014-05-21 | ND |
2014-05-21 | ND |
2014-05-21 | 1.000 ppb |
2014-05-21 | 1.000 ppb |
2014-05-21 | ND |
2014-05-21 | ND |
2014-05-21 | ND |
2014-05-21 | ND |
2014-05-21 | ND |
2014-05-21 | ND |
2014-05-21 | ND |
2014-05-21 | ND |
2014-05-21 | ND |
2014-05-21 | ND |
2014-05-21 | ND |
2014-05-21 | ND |
2014-05-21 | ND |
2014-05-21 | ND |
2014-06-27 | ND |
2014-06-27 | ND |
2014-12-16 | ND |
2014-12-16 | ND |
2015-02-05 | ND |
2015-02-05 | ND |
2015-02-05 | 0.500 ppb |
2015-02-05 | 0.500 ppb |
2015-02-05 | ND |
2015-02-05 | ND |
2015-02-05 | ND |
2015-02-05 | ND |
2015-04-17 | ND |
2015-04-17 | ND |
2015-05-05 | ND |
2015-05-05 | ND |
2015-05-05 | ND |
2015-05-05 | ND |
2015-05-05 | ND |
2015-05-05 | ND |
2015-05-05 | ND |
2015-05-05 | ND |
2015-05-12 | 0.900 ppb |
2015-05-12 | 0.900 ppb |
2015-05-12 | ND |
2015-05-12 | ND |
2015-05-12 | ND |
2015-05-12 | ND |
2015-06-02 | ND |
2015-06-02 | ND |
2015-06-02 | ND |
2015-06-02 | ND |
2015-06-02 | ND |
2015-06-02 | ND |
2015-06-02 | ND |
2015-06-02 | ND |
2015-06-02 | ND |
2015-06-02 | ND |
2015-06-04 | ND |
2015-06-04 | ND |
2015-06-04 | ND |
2015-06-04 | ND |
2015-06-04 | ND |
2015-06-04 | ND |
2015-08-05 | ND |
2015-08-05 | ND |
2015-08-05 | ND |
2015-08-05 | ND |
2015-08-05 | ND |
2015-08-05 | ND |
2015-08-05 | ND |
2015-08-05 | ND |
2015-09-17 | ND |
2015-09-17 | ND |
2015-11-03 | ND |
2015-11-03 | ND |
2015-11-03 | ND |
2015-11-03 | ND |
2015-11-03 | ND |
2015-11-03 | ND |
2015-11-03 | ND |
2015-11-03 | ND |
2016-02-03 | ND |
2016-02-03 | ND |
2016-02-03 | ND |
2016-02-03 | ND |
2016-02-03 | ND |
2016-02-03 | ND |
2016-02-03 | ND |
2016-02-03 | ND |
2016-05-04 | ND |
2016-05-04 | ND |
2016-05-04 | ND |
2016-05-04 | ND |
2016-05-04 | ND |
2016-05-04 | ND |
2016-05-04 | ND |
2016-05-04 | ND |
2016-05-12 | ND |
2016-05-12 | ND |
2016-05-12 | ND |
2016-05-12 | ND |
2016-05-12 | ND |
2016-05-12 | ND |
2016-05-12 | ND |
2016-05-12 | ND |
2016-05-13 | ND |
2016-05-13 | ND |
2016-05-13 | ND |
2016-05-13 | ND |
2016-05-13 | ND |
2016-05-13 | ND |
2016-05-25 | ND |
2016-05-25 | ND |
2016-05-25 | ND |
2016-05-25 | ND |
2016-05-25 | ND |
2016-05-25 | ND |
2016-05-25 | ND |
2016-05-25 | ND |
2016-05-25 | ND |
2016-05-25 | ND |
2016-08-03 | ND |
2016-08-03 | ND |
2016-08-03 | ND |
2016-08-03 | ND |
2016-08-03 | ND |
2016-08-03 | ND |
2016-08-03 | 1.10 ppb |
2016-08-03 | 1.10 ppb |
2016-11-02 | ND |
2016-11-02 | ND |
2016-11-02 | 1.20 ppb |
2016-11-02 | 1.20 ppb |
2016-11-02 | ND |
2016-11-02 | ND |
2016-11-02 | ND |
2016-11-02 | ND |
2017-02-02 | 1.80 ppb |
2017-02-02 | 1.80 ppb |
2017-02-02 | 1.50 ppb |
2017-02-02 | 1.50 ppb |
2017-02-02 | 1.20 ppb |
2017-02-02 | 1.20 ppb |
2017-02-02 | 1.20 ppb |
2017-02-02 | 1.20 ppb |
2017-05-02 | ND |
2017-05-02 | ND |
2017-05-02 | ND |
2017-05-02 | ND |
2017-05-02 | ND |
2017-05-02 | ND |
2017-05-02 | ND |
2017-05-02 | ND |
2017-05-02 | ND |
2017-05-02 | ND |
2017-05-02 | ND |
2017-05-02 | ND |
2017-05-02 | ND |
2017-05-02 | ND |
2017-05-03 | ND |
2017-05-03 | ND |
2017-05-03 | ND |
2017-05-03 | ND |
2017-05-03 | ND |
2017-05-03 | ND |
2017-05-03 | 1.10 ppb |
2017-05-03 | 1.10 ppb |
2017-05-16 | 0.660 ppb |
2017-05-16 | 0.660 ppb |
2017-05-16 | ND |
2017-05-16 | ND |
2017-05-16 | ND |
2017-05-16 | ND |
2017-05-16 | ND |
2017-05-16 | ND |
2017-05-16 | ND |
2017-05-16 | ND |
2017-08-02 | ND |
2017-08-02 | ND |
2017-08-02 | ND |
2017-08-02 | ND |
2017-08-02 | ND |
2017-08-02 | ND |
2017-08-02 | 1.000 ppb |
2017-08-02 | 1.000 ppb |
2017-08-31 | ND |
2017-08-31 | ND |
2017-11-02 | 1.40 ppb |
2017-11-02 | 1.40 ppb |
2017-11-02 | 1.20 ppb |
2017-11-02 | 1.20 ppb |
2017-11-02 | 1.20 ppb |
2017-11-02 | 1.20 ppb |
2017-11-02 | 1.20 ppb |
2017-11-02 | 1.20 ppb |
2017-11-14 | ND |
2017-11-14 | ND |
2018-02-06 | ND |
2018-02-06 | ND |
2018-02-06 | ND |
2018-02-06 | ND |
2018-02-06 | ND |
2018-02-06 | ND |
2018-02-06 | 1.000 ppb |
2018-02-06 | 1.000 ppb |
2018-03-01 | ND |
2018-03-01 | ND |
2018-05-02 | ND |
2018-05-02 | ND |
2018-05-02 | ND |
2018-05-02 | ND |
2018-05-02 | ND |
2018-05-02 | ND |
2018-05-02 | ND |
2018-05-02 | ND |
2018-06-20 | ND |
2018-06-20 | ND |
2018-06-20 | ND |
2018-06-20 | ND |
2018-06-20 | ND |
2018-06-20 | ND |
2018-06-20 | ND |
2018-06-20 | ND |
2018-06-20 | ND |
2018-06-20 | ND |
2018-06-20 | ND |
2018-06-20 | ND |
2018-06-20 | ND |
2018-06-20 | ND |
2018-06-20 | ND |
2018-06-20 | ND |
2018-06-26 | 0.630 ppb |
2018-06-26 | 0.630 ppb |
2018-06-26 | ND |
2018-06-26 | ND |
2018-06-26 | ND |
2018-06-26 | ND |
2018-06-26 | ND |
2018-06-26 | ND |
2018-06-26 | ND |
2018-06-26 | ND |
2018-06-26 | ND |
2018-06-26 | ND |
2018-08-07 | ND |
2018-08-07 | ND |
2018-08-07 | ND |
2018-08-07 | ND |
2018-08-07 | ND |
2018-08-07 | ND |
2018-08-07 | 1.10 ppb |
2018-08-07 | 1.10 ppb |
2018-09-12 | ND |
2018-09-12 | ND |
2018-11-07 | ND |
2018-11-07 | ND |
2018-11-07 | ND |
2018-11-07 | ND |
2018-11-07 | ND |
2018-11-07 | ND |
2018-11-07 | ND |
2018-11-07 | ND |
2019-02-12 | ND |
2019-02-12 | ND |
2019-02-12 | ND |
2019-02-12 | ND |
2019-02-12 | ND |
2019-02-12 | ND |
2019-02-12 | ND |
2019-02-12 | ND |
2019-05-09 | ND |
2019-05-09 | ND |
2019-05-09 | ND |
2019-05-09 | ND |
2019-05-09 | ND |
2019-05-09 | ND |
2019-05-09 | ND |
2019-05-09 | ND |
2019-07-24 | 0.990 ppb |
2019-07-24 | 0.990 ppb |
2019-07-24 | ND |
2019-07-24 | ND |
2019-07-24 | ND |
2019-07-24 | ND |
2019-08-06 | ND |
2019-08-06 | ND |
2019-08-06 | ND |
2019-08-06 | ND |
2019-08-06 | ND |
2019-08-06 | ND |
2019-08-06 | 1.10 ppb |
2019-08-06 | 1.10 ppb |
2019-11-06 | ND |
2019-11-06 | ND |
2019-11-06 | 0.510 ppb |
2019-11-06 | 0.510 ppb |
2019-11-06 | ND |
2019-11-06 | ND |
2019-11-06 | 0.810 ppb |
2019-11-06 | 0.810 ppb |