Bromoform
Rehoboth 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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | 0.505 ppb | 20 | 12 | ND - 1.35 ppb |
2015 | 0.276 ppb | 23 | 7 | ND - 1.15 ppb |
2016 | 0.408 ppb | 18 | 9 | ND - 1.07 ppb |
2017 | 0.737 ppb | 18 | 10 | ND - 2.71 ppb |
2018 | 0.818 ppb | 20 | 11 | ND - 3.16 ppb |
2019 | 0.678 ppb | 20 | 14 | ND - 1.98 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 | S479051 | 0.720 ppb |
2014-03-05 | S479052 | ND |
2014-03-05 | S479053 | 1.15 ppb |
2014-03-05 | S479054 | 0.720 ppb |
2014-05-15 | S479194 | ND |
2014-06-02 | S479123 | ND |
2014-06-02 | S479124 | 0.820 ppb |
2014-06-02 | S479125 | 0.650 ppb |
2014-06-02 | S479126 | 0.840 ppb |
2014-07-28 | L5175318-1 | ND |
2014-09-03 | S479191 | 1.000 ppb |
2014-09-03 | S479192 | 0.950 ppb |
2014-09-03 | S536964 | 0.530 ppb |
2014-09-03 | S536965 | 1.35 ppb |
2014-10-15 | S257741 | ND |
2014-10-21 | S251486 | ND |
2014-12-01 | S316446 | ND |
2014-12-01 | S316447 | ND |
2014-12-01 | S316448 | 0.530 ppb |
2014-12-01 | S316449 | 0.830 ppb |
2015-01-14 | S504599 | ND |
2015-03-02 | S580502 | ND |
2015-03-02 | S580503 | ND |
2015-03-02 | S580504 | 0.740 ppb |
2015-03-02 | S580505 | 0.540 ppb |
2015-05-27 | S612405 | ND |
2015-06-01 | S612414 | ND |
2015-06-01 | S612415 | ND |
2015-06-01 | S612416 | 1.13 ppb |
2015-06-01 | S612417 | 0.990 ppb |
2015-08-10 | S590347 | ND |
2015-08-26 | S602019 | ND |
2015-09-09 | S602035 | ND |
2015-09-09 | S602036 | 1.15 ppb |
2015-09-09 | S602037 | ND |
2015-09-09 | S602038 | 0.650 ppb |
2015-10-20 | S614746 | ND |
2015-10-20 | S614747 | ND |
2015-11-05 | S624991 | ND |
2015-12-07 | S625009 | ND |
2015-12-07 | S625010 | ND |
2015-12-07 | S625011 | ND |
2015-12-07 | S625012 | 1.14 ppb |
2016-03-07 | S602103 | ND |
2016-03-07 | S602104 | ND |
2016-03-07 | S602105 | ND |
2016-03-07 | S602106 | 0.840 ppb |
2016-04-11 | S73229 | ND |
2016-04-11 | S73230 | ND |
2016-06-06 | S629046 | ND |
2016-06-06 | S629047 | 0.580 ppb |
2016-06-06 | S629048 | 0.710 ppb |
2016-06-06 | S629049 | 1.07 ppb |
2016-09-07 | S670379 | 0.900 ppb |
2016-09-07 | S670380 | 0.630 ppb |
2016-09-07 | S670381 | ND |
2016-09-07 | S670382 | 0.850 ppb |
2016-12-05 | S670400 | 0.770 ppb |
2016-12-05 | S670401 | ND |
2016-12-05 | S670402 | ND |
2016-12-05 | S670403 | 1.000 ppb |
2017-01-24 | S670498 | ND |
2017-03-06 | S679363 | ND |
2017-03-06 | S679364 | ND |
2017-03-06 | S679365 | ND |
2017-03-06 | S679366 | 1.01 ppb |
2017-06-06 | S730806 | 1.000 ppb |
2017-06-06 | S730807 | 0.590 ppb |
2017-06-06 | S730808 | 0.920 ppb |
2017-06-06 | S730809 | 1.06 ppb |
2017-07-31 | S679387 | ND |
2017-09-05 | S737137 | 2.71 ppb |
2017-09-05 | S737141 | 2.19 ppb |
2017-09-05 | S737145 | 1.30 ppb |
2017-09-05 | S737149 | 1.96 ppb |
2017-12-04 | S659090 | ND |
2017-12-04 | S670396 | ND |
2017-12-04 | S679375 | ND |
2017-12-04 | S679379 | 0.530 ppb |
2018-01-24 | S730853 | ND |
2018-03-06 | S770612 | ND |
2018-03-06 | S770616 | ND |
2018-03-06 | S770620 | ND |
2018-03-06 | S770624 | 1.17 ppb |
2018-06-04 | S770754 | 0.550 ppb |
2018-06-04 | S770806 | ND |
2018-06-04 | S770833 | 1.25 ppb |
2018-06-20 | S770575 | 0.770 ppb |
2018-09-05 | S812289 | 3.16 ppb |
2018-09-05 | S812293 | 2.40 ppb |
2018-09-05 | S812297 | 0.670 ppb |
2018-09-05 | S812301 | 2.74 ppb |
2018-09-10 | S812241 | ND |
2018-11-09 | S812575 | ND |
2018-11-09 | S812577 | ND |
2018-12-05 | S817013 | ND |
2018-12-05 | S817017 | 1.71 ppb |
2018-12-05 | S817021 | 1.37 ppb |
2018-12-05 | S817029 | 0.570 ppb |
2019-03-04 | S847933 | 0.570 ppb |
2019-03-04 | S847937 | 0.620 ppb |
2019-03-04 | S847941 | ND |
2019-03-04 | S847945 | 0.910 ppb |
2019-04-29 | S847993 | ND |
2019-04-29 | S847995 | 1.98 ppb |
2019-05-28 | S848014 | 0.680 ppb |
2019-05-28 | S848015 | ND |
2019-06-03 | S848059 | 1.32 ppb |
2019-06-03 | S848063 | 1.09 ppb |
2019-06-03 | S848067 | 0.810 ppb |
2019-06-03 | S848071 | 1.45 ppb |
2019-09-03 | S864697 | 1.13 ppb |
2019-09-03 | S864701 | 0.760 ppb |
2019-09-03 | S864705 | ND |
2019-09-03 | S864709 | ND |
2019-12-03 | S919907 | 0.620 ppb |
2019-12-03 | S919911 | 0.540 ppb |
2019-12-03 | S919915 | ND |
2019-12-03 | S919919 | 1.08 ppb |