Bromoform
Pittsburgh Water & Sewer Authority
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.
293
Samples
0
Samples exceeding legal limit (MCL)
198
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 2.04 ppb | 50 | 50 | 0.720 ppb - 4.10 ppb |
| 2015 | 2.79 ppb | 51 | 51 | 0.800 ppb - 25.1 ppb |
| 2016 | 2.29 ppb | 48 | 39 | ND - 8.80 ppb |
| 2017 | 1.06 ppb | 48 | 24 | ND - 3.00 ppb |
| 2018 | 0.659 ppb | 48 | 17 | ND - 2.93 ppb |
| 2019 | 0.332 ppb | 48 | 17 | ND - 1.47 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 |
|---|---|---|
| 2014-02-03 | 1071415005 | 1.70 ppb |
| 2014-02-03 | 1071415012 | 2.40 ppb |
| 2014-02-03 | 1071415001 | 1.70 ppb |
| 2014-02-03 | 1071415006 | 1.80 ppb |
| 2014-02-03 | 1071415008 | 1.20 ppb |
| 2014-02-03 | 1071415003 | 1.70 ppb |
| 2014-02-03 | 1071415004 | 1.60 ppb |
| 2014-02-03 | 1071415010 | 1.70 ppb |
| 2014-02-03 | 1071415002 | 1.80 ppb |
| 2014-02-03 | 1071415009 | 1.000 ppb |
| 2014-02-03 | 1071415007 | 1.40 ppb |
| 2014-02-03 | 1071415011 | 0.720 ppb |
| 2014-05-12 | 2006707007 | 1.10 ppb |
| 2014-05-12 | 2006707002 | 0.740 ppb |
| 2014-05-12 | 2006707009 | 0.980 ppb |
| 2014-05-12 | 2006707012 | 1.30 ppb |
| 2014-05-12 | 2006707005 | 0.900 ppb |
| 2014-05-12 | 2006707006 | 1.30 ppb |
| 2014-05-12 | 2006707004 | 0.720 ppb |
| 2014-05-12 | 2006707001 | 0.850 ppb |
| 2014-05-12 | 2006707011 | 1.20 ppb |
| 2014-05-12 | 2006707008 | 0.810 ppb |
| 2014-05-12 | 2006707003 | 1.30 ppb |
| 2014-05-12 | 2006707010 | 1.20 ppb |
| 2014-08-01 | 2021780007 | 2.20 ppb |
| 2014-08-01 | 2021780002 | 0.980 ppb |
| 2014-08-01 | 2021780009 | 3.20 ppb |
| 2014-08-01 | 2021780012 | 2.10 ppb |
| 2014-08-01 | 2021780005 | 3.20 ppb |
| 2014-08-01 | 2021780006 | 2.40 ppb |
| 2014-08-01 | 2021780004 | 4.10 ppb |
| 2014-08-01 | 2021780001 | 2.50 ppb |
| 2014-08-01 | 2021780011 | 3.40 ppb |
| 2014-08-01 | 2021780008 | 2.50 ppb |
| 2014-08-01 | 2021780003 | 2.70 ppb |
| 2014-08-01 | 2021780010 | 2.90 ppb |
| 2014-08-18 | 2024501001 | 2.80 ppb |
| 2014-08-18 | 2024501002 | 4.00 ppb |
| 2014-11-03 | 11140081 | 3.00 ppb |
| 2014-11-03 | 11140072 | 2.00 ppb |
| 2014-11-03 | 11140079 | 3.00 ppb |
| 2014-11-03 | 11140075 | 4.00 ppb |
| 2014-11-03 | 11140078 | 3.00 ppb |
| 2014-11-03 | 11140071 | 2.00 ppb |
| 2014-11-03 | 11140080 | 2.00 ppb |
| 2014-11-03 | 11140076 | 3.00 ppb |
| 2014-11-03 | 11140077 | 3.00 ppb |
| 2014-11-03 | 11140074 | 2.00 ppb |
| 2014-11-03 | 11140073 | 3.00 ppb |
| 2014-11-04 | 11140263 | 2.00 ppb |
| 2015-01-29 | 12344324 | 2.50 ppb |
| 2015-01-29 | 12344274 | 25.1 ppb |
| 2015-01-29 | 12344314 | 2.72 ppb |
| 2015-01-29 | 12344284 | 2.49 ppb |
| 2015-01-29 | 12344309 | 2.65 ppb |
| 2015-01-29 | 12344269 | 1.89 ppb |
| 2015-01-29 | 12344294 | 2.45 ppb |
| 2015-01-29 | 12344319 | 2.56 ppb |
| 2015-01-29 | 12344289 | 2.38 ppb |
| 2015-01-29 | 12344304 | 2.97 ppb |
| 2015-01-29 | 12344299 | 2.24 ppb |
| 2015-01-29 | 12344279 | 9.47 ppb |
| 2015-03-09 | 12572664 | 5.00 ppb |
| 2015-03-11 | 12572663 | 4.00 ppb |
| 2015-03-12 | 12572662 | 3.00 ppb |
| 2015-04-29 | 12691775 | 1.000 ppb |
| 2015-04-29 | 12691781 | 1.000 ppb |
| 2015-04-29 | 12691787 | 1.000 ppb |
| 2015-04-29 | 12691793 | 1.000 ppb |
| 2015-04-29 | 12691799 | 1.000 ppb |
| 2015-04-29 | 12691805 | 1.000 ppb |
| 2015-04-29 | 12691817 | 1.000 ppb |
| 2015-04-29 | 12691823 | 1.000 ppb |
| 2015-04-29 | 12691829 | 1.000 ppb |
| 2015-04-29 | 12691835 | 1.000 ppb |
| 2015-04-29 | 12691841 | 1.000 ppb |
| 2015-04-30 | 12691811 | 1.000 ppb |
| 2015-07-29 | 13074843 | 1.10 ppb |
| 2015-07-29 | 13074853 | 1.50 ppb |
| 2015-07-29 | 13074873 | 1.000 ppb |
| 2015-07-29 | 13074878 | 1.10 ppb |
| 2015-07-29 | 13074868 | 1.10 ppb |
| 2015-07-29 | 13074838 | 1.000 ppb |
| 2015-07-29 | 13074848 | 1.20 ppb |
| 2015-07-29 | 13074883 | 0.800 ppb |
| 2015-07-29 | 13074863 | 1.20 ppb |
| 2015-07-29 | 13074858 | 0.900 ppb |
| 2015-07-29 | 13074888 | 1.20 ppb |
| 2015-07-30 | 13197730 | 1.10 ppb |
| 2015-11-02 | 13572995 | 2.50 ppb |
| 2015-11-02 | 13573035 | 3.70 ppb |
| 2015-11-02 | 13573012 | 3.10 ppb |
| 2015-11-02 | 13573018 | 2.50 ppb |
| 2015-11-02 | 13572989 | 2.70 ppb |
| 2015-11-02 | 13573029 | 6.30 ppb |
| 2015-11-03 | 13573024 | 4.30 ppb |
| 2015-11-03 | 13573053 | 3.60 ppb |
| 2015-11-03 | 13573006 | 4.00 ppb |
| 2015-11-03 | 13573047 | 5.60 ppb |
| 2015-11-03 | 13573001 | 3.50 ppb |
| 2015-11-03 | 13573041 | 3.80 ppb |
| 2016-02-01 | 13812286 | 0.970 ppb |
| 2016-02-01 | 13812226 | 0.980 ppb |
| 2016-02-01 | 13812244 | 0.920 ppb |
| 2016-02-01 | 13812250 | 0.850 ppb |
| 2016-02-01 | 13812280 | ND |
| 2016-02-01 | 13812256 | ND |
| 2016-02-01 | 13812238 | ND |
| 2016-02-01 | 13812292 | 1.20 ppb |
| 2016-02-01 | 13812232 | ND |
| 2016-02-02 | 13812262 | 1.40 ppb |
| 2016-02-02 | 13812274 | ND |
| 2016-02-02 | 13812268 | ND |
| 2016-05-02 | 14327817 | 0.930 ppb |
| 2016-05-02 | 14327841 | 1.20 ppb |
| 2016-05-02 | 14327871 | 0.810 ppb |
| 2016-05-02 | 14327853 | ND |
| 2016-05-02 | 14327859 | 0.920 ppb |
| 2016-05-02 | 14327865 | 0.800 ppb |
| 2016-05-02 | 14327877 | 0.940 ppb |
| 2016-05-02 | 14327829 | 0.770 ppb |
| 2016-05-02 | 14327847 | ND |
| 2016-05-02 | 14327823 | 0.920 ppb |
| 2016-05-02 | 14387821 | 0.890 ppb |
| 2016-05-02 | 14327835 | 0.730 ppb |
| 2016-08-01 | 14820948 | 7.00 ppb |
| 2016-08-01 | 14820984 | 8.80 ppb |
| 2016-08-01 | 14820954 | 4.50 ppb |
| 2016-08-01 | 14820966 | 6.00 ppb |
| 2016-08-01 | 14820996 | 3.40 ppb |
| 2016-08-01 | 14820972 | 7.10 ppb |
| 2016-08-01 | 14820942 | 7.40 ppb |
| 2016-08-01 | 14820960 | 3.80 ppb |
| 2016-08-01 | 14821008 | 7.00 ppb |
| 2016-08-01 | 14821002 | 5.70 ppb |
| 2016-08-01 | 14820990 | 6.20 ppb |
| 2016-08-01 | 14820978 | 7.60 ppb |
| 2016-10-31 | 15152894 | 2.20 ppb |
| 2016-10-31 | 15152858 | 1.60 ppb |
| 2016-10-31 | 15152882 | 1.40 ppb |
| 2016-10-31 | 15152876 | 1.90 ppb |
| 2016-10-31 | 15152906 | 1.60 ppb |
| 2016-10-31 | 15152864 | 0.820 ppb |
| 2016-10-31 | 15152912 | ND |
| 2016-10-31 | 15152918 | 2.80 ppb |
| 2016-10-31 | 15152870 | 1.70 ppb |
| 2016-10-31 | 15152888 | 2.10 ppb |
| 2016-10-31 | 15152900 | 1.60 ppb |
| 2016-11-01 | 15152852 | 2.30 ppb |
| 2017-02-03 | 15722375 | ND |
| 2017-02-03 | 15722417 | ND |
| 2017-02-03 | 15722423 | ND |
| 2017-02-03 | 15722387 | ND |
| 2017-02-03 | 15722371 | ND |
| 2017-02-03 | 15722405 | ND |
| 2017-02-03 | 15722393 | ND |
| 2017-02-03 | 15722399 | ND |
| 2017-02-03 | 15722411 | ND |
| 2017-02-03 | 15722363 | ND |
| 2017-02-03 | 15722381 | ND |
| 2017-02-15 | 15722356 | ND |
| 2017-05-02 | 16016216 | ND |
| 2017-05-02 | 16016209 | ND |
| 2017-05-02 | 16016206 | ND |
| 2017-05-02 | 16016214 | ND |
| 2017-05-02 | 16016213 | ND |
| 2017-05-02 | 16016212 | ND |
| 2017-05-02 | 16016215 | ND |
| 2017-05-02 | 16016205 | ND |
| 2017-05-02 | 16016208 | ND |
| 2017-05-02 | 16016211 | ND |
| 2017-05-02 | 16016210 | ND |
| 2017-05-03 | 16016207 | ND |
| 2017-08-01 | 16644483 | 2.00 ppb |
| 2017-08-01 | 16644459 | 2.00 ppb |
| 2017-08-01 | 16644495 | 2.00 ppb |
| 2017-08-01 | 16644512 | 2.00 ppb |
| 2017-08-01 | 16644447 | 2.00 ppb |
| 2017-08-01 | 16644477 | 1.000 ppb |
| 2017-08-01 | 16644471 | 2.00 ppb |
| 2017-08-01 | 16644453 | 1.000 ppb |
| 2017-08-01 | 16644507 | 2.00 ppb |
| 2017-08-01 | 16644489 | 2.00 ppb |
| 2017-08-01 | 16644465 | 2.00 ppb |
| 2017-08-01 | 16644501 | 2.00 ppb |
| 2017-11-01 | 17090628 | 3.00 ppb |
| 2017-11-01 | 17090646 | 2.00 ppb |
| 2017-11-01 | 17090652 | 2.00 ppb |
| 2017-11-01 | 17090658 | 2.00 ppb |
| 2017-11-01 | 17090664 | 2.00 ppb |
| 2017-11-01 | 17090670 | 3.00 ppb |
| 2017-11-02 | 17090634 | 3.00 ppb |
| 2017-11-02 | 17090640 | 2.00 ppb |
| 2017-11-02 | 17091651 | 3.00 ppb |
| 2017-11-02 | 17090676 | 3.00 ppb |
| 2017-11-02 | 17090682 | 2.00 ppb |
| 2017-11-02 | 17090688 | 2.00 ppb |
| 2018-02-02 | 02180209 | ND |
| 2018-02-02 | 02180205 | ND |
| 2018-02-02 | 02180211 | ND |
| 2018-02-02 | 02180214 | ND |
| 2018-02-02 | 02180203 | ND |
| 2018-02-02 | 02180208 | ND |
| 2018-02-02 | 02180207 | ND |
| 2018-02-02 | 02180204 | ND |
| 2018-02-02 | 02180213 | ND |
| 2018-02-02 | 02180210 | ND |
| 2018-02-02 | 02180206 | ND |
| 2018-02-02 | 02180212 | ND |
| 2018-05-01 | 18E0088-04 | ND |
| 2018-05-01 | 18E0088-02 | ND |
| 2018-05-01 | 18E0088-07 | ND |
| 2018-05-01 | 18E0088-03 | ND |
| 2018-05-01 | 18E0088-01 | 0.620 ppb |
| 2018-05-01 | 18E0088-06 | ND |
| 2018-05-01 | 18E0088-05 | ND |
| 2018-05-02 | 18E0264-05 | ND |
| 2018-05-02 | 18E0264-01 | ND |
| 2018-05-02 | 18E0264-03 | ND |
| 2018-05-02 | 18E0264-04 | ND |
| 2018-05-02 | 18E0264-02 | ND |
| 2018-08-01 | 18H0210-04 | 1.24 ppb |
| 2018-08-01 | 18H0210-02 | 2.57 ppb |
| 2018-08-01 | 18H0210-03 | 2.03 ppb |
| 2018-08-01 | 18H0210-01 | 2.51 ppb |
| 2018-08-01 | 18H0210-05 | 2.62 ppb |
| 2018-08-01 | 18H0210-06 | 2.61 ppb |
| 2018-08-02 | 18H0572-04 | 2.34 ppb |
| 2018-08-02 | 18H0572-06 | 2.71 ppb |
| 2018-08-02 | 18H0572-01 | 2.40 ppb |
| 2018-08-02 | 18H0572-03 | 2.93 ppb |
| 2018-08-02 | 18H0572-05 | 2.57 ppb |
| 2018-08-02 | 18H0572-02 | 2.30 ppb |
| 2018-11-01 | 18K0426-04 | ND |
| 2018-11-01 | 18K0426-06 | 0.517 ppb |
| 2018-11-01 | 18K0426-03 | ND |
| 2018-11-01 | 18K0426-01 | ND |
| 2018-11-01 | 18K0426-02 | 0.560 ppb |
| 2018-11-01 | 18K0426-05 | ND |
| 2018-11-02 | 18K0627-02 | ND |
| 2018-11-02 | 18K0627-05 | ND |
| 2018-11-02 | 18K0627-01 | ND |
| 2018-11-02 | 18K0627-03 | 0.525 ppb |
| 2018-11-02 | 18K0627-06 | 0.586 ppb |
| 2018-11-02 | 18K0627-04 | ND |
| 2019-02-01 | 19B0579-01 | 0.502 ppb |
| 2019-02-01 | 19B0579-02 | ND |
| 2019-02-01 | 19B0579-03 | 0.512 ppb |
| 2019-02-01 | 19B0579-04 | 0.555 ppb |
| 2019-02-01 | 19B0579-05 | ND |
| 2019-02-01 | 19B0579-06 | ND |
| 2019-02-01 | 19B0579-07 | 0.512 ppb |
| 2019-02-01 | 19B0579-08 | ND |
| 2019-02-01 | 19B0579-09 | 0.584 ppb |
| 2019-02-01 | 19B0579-10 | ND |
| 2019-02-01 | 19B0579-11 | ND |
| 2019-02-01 | 19B0579-12 | 0.510 ppb |
| 2019-05-01 | 19E0821-02 | ND |
| 2019-05-01 | 19E0821-06 | ND |
| 2019-05-01 | 19E0821-03 | ND |
| 2019-05-01 | 19E0821-01 | ND |
| 2019-05-01 | 19E0821-05 | ND |
| 2019-05-01 | 19E0821-04 | ND |
| 2019-05-02 | 19E0870-03 | ND |
| 2019-05-02 | 19E0870-02 | ND |
| 2019-05-02 | 19E0870-01 | ND |
| 2019-05-03 | 19E1121-02 | ND |
| 2019-05-03 | 19E1121-01 | ND |
| 2019-05-03 | 19E1121-03 | ND |
| 2019-08-01 | 19H1062-03 | ND |
| 2019-08-01 | 19H1062-06 | ND |
| 2019-08-01 | 19H1062-02 | ND |
| 2019-08-01 | 19H1062-01 | ND |
| 2019-08-01 | 19H1062-04 | ND |
| 2019-08-01 | 19H1062-05 | ND |
| 2019-08-02 | 19H1096-02 | ND |
| 2019-08-02 | 19H1096-05 | ND |
| 2019-08-02 | 19H1096-01 | ND |
| 2019-08-02 | 19H1096-04 | ND |
| 2019-08-02 | 19H1096-06 | ND |
| 2019-08-02 | 19H1096-03 | ND |
| 2019-11-01 | 19K0944-03 | 0.856 ppb |
| 2019-11-01 | 19K0946-02 | 1.26 ppb |
| 2019-11-01 | 19K0944-04 | 1.09 ppb |
| 2019-11-01 | 19K0944-06 | 1.44 ppb |
| 2019-11-01 | 19K0944-01 | 1.10 ppb |
| 2019-11-01 | 19K0946-04 | ND |
| 2019-11-01 | 19K0944-02 | 1.33 ppb |
| 2019-11-01 | 19K0946-01 | 0.563 ppb |
| 2019-11-01 | 19K0946-06 | 1.47 ppb |
| 2019-11-01 | 19K0946-05 | 1.11 ppb |
| 2019-11-01 | 19K0946-03 | 1.23 ppb |
| 2019-11-01 | 19K0944-05 | 1.31 ppb |