Bromoform
Greendale Waterworks
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 | 0.373 ppb | 16 | 16 | 0.240 ppb - 0.520 ppb |
2015 | 0.398 ppb | 16 | 16 | 0.240 ppb - 0.670 ppb |
2016 | 0.268 ppb | 16 | 13 | ND - 0.440 ppb |
2017 | 0.182 ppb | 16 | 8 | ND - 0.440 ppb |
2018 | 0.0963 ppb | 16 | 6 | ND - 0.280 ppb |
2019 | 0.263 ppb | 16 | 15 | ND - 0.590 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 |
---|---|---|
2014-03-05 | 773319 | 0.310 ppb |
2014-03-05 | 773320 | 0.380 ppb |
2014-03-05 | 773321 | 0.410 ppb |
2014-03-05 | 773318 | 0.290 ppb |
2014-06-03 | 794166 | 0.430 ppb |
2014-06-03 | 794168 | 0.440 ppb |
2014-06-03 | 794165 | 0.490 ppb |
2014-06-03 | 794167 | 0.520 ppb |
2014-09-02 | 814783 | 0.420 ppb |
2014-09-02 | 814784 | 0.480 ppb |
2014-09-02 | 814781 | 0.420 ppb |
2014-09-02 | 814782 | 0.380 ppb |
2014-12-02 | 833635 | 0.250 ppb |
2014-12-02 | 833633 | 0.240 ppb |
2014-12-02 | 833634 | 0.240 ppb |
2014-12-02 | 833632 | 0.260 ppb |
2015-03-04 | 846446 | 0.350 ppb |
2015-03-04 | 846447 | 0.370 ppb |
2015-03-04 | 846445 | 0.360 ppb |
2015-03-04 | 846448 | 0.350 ppb |
2015-06-02 | 863112 | 0.330 ppb |
2015-06-02 | 863111 | 0.300 ppb |
2015-06-02 | 863110 | 0.270 ppb |
2015-06-02 | 863113 | 0.420 ppb |
2015-09-02 | 880647 | 0.670 ppb |
2015-09-02 | 880646 | 0.630 ppb |
2015-09-02 | 880648 | 0.580 ppb |
2015-09-02 | 880649 | 0.500 ppb |
2015-12-02 | 896271 | 0.290 ppb |
2015-12-02 | 896273 | 0.420 ppb |
2015-12-02 | 896272 | 0.290 ppb |
2015-12-02 | 896270 | 0.240 ppb |
2016-03-09 | 909381 | ND |
2016-03-09 | 909379 | ND |
2016-03-09 | 909380 | ND |
2016-03-09 | 909382 | 0.280 ppb |
2016-06-08 | 925875 | 0.390 ppb |
2016-06-08 | 925874 | 0.310 ppb |
2016-06-08 | 925873 | 0.290 ppb |
2016-06-08 | 925872 | 0.280 ppb |
2016-09-07 | 944006 | 0.270 ppb |
2016-09-07 | 944008 | 0.320 ppb |
2016-09-07 | 944007 | 0.360 ppb |
2016-09-07 | 944009 | 0.440 ppb |
2016-11-30 | 962267 | 0.300 ppb |
2016-11-30 | 962266 | 0.310 ppb |
2016-11-30 | 962264 | 0.340 ppb |
2016-11-30 | 962265 | 0.400 ppb |
2017-03-08 | 976955 | ND |
2017-03-08 | 976956 | 0.260 ppb |
2017-03-08 | 976957 | 0.310 ppb |
2017-03-08 | 976958 | 0.440 ppb |
2017-06-07 | 996318 | ND |
2017-06-07 | 996319 | ND |
2017-06-07 | 996320 | ND |
2017-06-07 | 996321 | ND |
2017-09-06 | 1016383 | 0.330 ppb |
2017-09-06 | 1016382 | 0.380 ppb |
2017-09-06 | 1016384 | 0.400 ppb |
2017-09-06 | 1016385 | 0.400 ppb |
2017-12-06 | 1032495 | ND |
2017-12-06 | 1032494 | ND |
2017-12-06 | 1032493 | ND |
2017-12-06 | 1032492 | 0.390 ppb |
2018-03-07 | 1044158 | ND |
2018-03-07 | 1044159 | ND |
2018-03-07 | 1044157 | ND |
2018-03-07 | 1044156 | ND |
2018-06-06 | 1059687 | ND |
2018-06-06 | 1059686 | ND |
2018-06-06 | 1059684 | ND |
2018-06-06 | 1059685 | ND |
2018-09-05 | 1078434 | ND |
2018-09-05 | 1078435 | 0.250 ppb |
2018-09-05 | 1078436 | 0.250 ppb |
2018-09-05 | 1078437 | 0.260 ppb |
2018-12-06 | 1096510 | 0.240 ppb |
2018-12-06 | 1096508 | 0.280 ppb |
2018-12-06 | 1096507 | ND |
2018-12-06 | 1096509 | 0.260 ppb |
2019-03-06 | 1108246 | 0.200 ppb |
2019-03-06 | 1108243 | 0.220 ppb |
2019-03-06 | 1108244 | 0.240 ppb |
2019-03-06 | 1108245 | 0.260 ppb |
2019-06-05 | 1125652 | 0.250 ppb |
2019-06-05 | 1125654 | 0.240 ppb |
2019-06-05 | 1125651 | 0.220 ppb |
2019-06-05 | 1125653 | ND |
2019-09-04 | 1145424 | 0.270 ppb |
2019-09-04 | 1145425 | 0.280 ppb |
2019-09-04 | 1145423 | 0.300 ppb |
2019-09-04 | 1145422 | 0.590 ppb |
2019-12-04 | 1163571 | 0.240 ppb |
2019-12-04 | 1163572 | 0.260 ppb |
2019-12-04 | 1163573 | 0.260 ppb |
2019-12-04 | 1163570 | 0.380 ppb |