Bromoform
Coachella Water 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.
104
Samples
0
Samples exceeding legal limit (MCL)
53
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.511 ppb | 12 | 8 | ND - 0.890 ppb |
| 2015 | 0.538 ppb | 16 | 11 | ND - 1.40 ppb |
| 2016 | 0.480 ppb | 22 | 11 | ND - 2.00 ppb |
| 2017 | 0.471 ppb | 16 | 10 | ND - 1.10 ppb |
| 2018 | 0.528 ppb | 16 | 7 | ND - 4.00 ppb |
| 2019 | 0.530 ppb | 22 | 7 | ND - 4.60 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 | Lab ID | Result |
|---|---|---|
| 2014-04-07 | 4790-801-0715 | 0.880 ppb |
| 2014-04-07 | 4790-802-0745 | ND |
| 2014-04-07 | 4790-803-0815 | 0.860 ppb |
| 2014-04-07 | 4790-804-0845 | 0.890 ppb |
| 2014-07-07 | 4790-801-0815 | 0.540 ppb |
| 2014-07-07 | 4790-802-0840 | ND |
| 2014-07-07 | 4790-803-0920 | 0.500 ppb |
| 2014-07-07 | 4790-804-0857 | 0.680 ppb |
| 2014-10-06 | 4790-801-0815 | 0.890 ppb |
| 2014-10-06 | 4790-802-0755 | ND |
| 2014-10-06 | 4790-803-0830 | 0.890 ppb |
| 2014-10-06 | 4790-804-0845 | ND |
| 2015-01-12 | 4790-801-0838 | 1.10 ppb |
| 2015-01-12 | 4790-802-0815 | ND |
| 2015-01-12 | 4790-803-0930 | 0.780 ppb |
| 2015-01-12 | 4790-804-0900 | ND |
| 2015-04-13 | 4790-801-0810 | 0.770 ppb |
| 2015-04-13 | 4790-802-0750 | ND |
| 2015-04-13 | 4790-803-0925 | 0.750 ppb |
| 2015-04-13 | 4790-804-0945 | 0.520 ppb |
| 2015-07-13 | 4790-801-0840 | 0.660 ppb |
| 2015-07-13 | 4790-802-0825 | ND |
| 2015-07-13 | 4790-803-0930 | 0.610 ppb |
| 2015-07-13 | 4790-804-0915 | 0.640 ppb |
| 2015-10-12 | 4790-801-0830 | 1.40 ppb |
| 2015-10-12 | 4790-802-0756 | ND |
| 2015-10-12 | 4790-803-0900 | 0.750 ppb |
| 2015-10-12 | 4790-804-0725 | 0.620 ppb |
| 2016-01-11 | 4790-801-0920 | 1.40 ppb |
| 2016-01-11 | 4790-802-0850 | ND |
| 2016-01-11 | 4790-803-1000 | 0.830 ppb |
| 2016-01-11 | 4790-804-0940 | ND |
| 2016-04-14 | 4790-801-0830 | 1.10 ppb |
| 2016-04-14 | 4790-802-0815 | ND |
| 2016-04-14 | 4790-803-0845 | 0.560 ppb |
| 2016-04-14 | 4790-804-0905 | 0.550 ppb |
| 2016-04-26 | 4790-009-0754 | ND |
| 2016-04-26 | 4790-010-0700 | ND |
| 2016-04-26 | 4790-012-0909 | 2.00 ppb |
| 2016-04-27 | 4790-018-0800 | ND |
| 2016-04-27 | 4790-019-0720 | ND |
| 2016-04-27 | 4790-020-0830 | ND |
| 2016-07-11 | 4790-801-0810 | 1.000 ppb |
| 2016-07-11 | 4790-802-0755 | ND |
| 2016-07-11 | 4790-803-0850 | ND |
| 2016-07-11 | 4790-804-0835 | 0.590 ppb |
| 2016-10-10 | 4790-801-0850 | 1.10 ppb |
| 2016-10-10 | 4790-802-0830 | ND |
| 2016-10-10 | 4790-803-0945 | 0.670 ppb |
| 2016-10-10 | 4790-804-0950 | 0.760 ppb |
| 2017-01-09 | 4790-801-1030 | 0.850 ppb |
| 2017-01-09 | 4790-802-1100 | ND |
| 2017-01-09 | 4790-803-1130 | 0.620 ppb |
| 2017-01-09 | 4790-804-1115 | 0.690 ppb |
| 2017-04-10 | 4790-801-0830 | 0.940 ppb |
| 2017-04-10 | 4790-802-0815 | ND |
| 2017-04-10 | 4790-803-0845 | ND |
| 2017-04-10 | 4790-804-0900 | ND |
| 2017-07-10 | 4790-801-0810 | 1.10 ppb |
| 2017-07-10 | 4790-802-0830 | ND |
| 2017-07-10 | 4790-803-0920 | 0.690 ppb |
| 2017-07-10 | 4790-804-0900 | 0.850 ppb |
| 2017-10-10 | 4790-801-0915 | 0.700 ppb |
| 2017-10-10 | 4790-802-0850 | ND |
| 2017-10-10 | 4790-803-0930 | 0.560 ppb |
| 2017-10-10 | 4790-804-0940 | 0.540 ppb |
| 2018-01-08 | 4790-801-0850 | 0.900 ppb |
| 2018-01-08 | 4790-802-0825 | ND |
| 2018-01-08 | 4790-803-0910 | 0.690 ppb |
| 2018-01-08 | 4790-804-0950 | 0.520 ppb |
| 2018-04-16 | 4790-801-0730 | ND |
| 2018-04-16 | 4790-802-0800 | ND |
| 2018-04-16 | 4790-803-0900 | ND |
| 2018-04-16 | 4790-804-0830 | 0.540 ppb |
| 2018-07-06 | 4790-801-1320 | ND |
| 2018-07-06 | 4790-802-1400 | ND |
| 2018-07-06 | 4790-803-1335 | ND |
| 2018-07-06 | 4790-804-1425 | ND |
| 2018-10-05 | 4790-801-1220 | 4.00 ppb |
| 2018-10-05 | 4790-802-1200 | ND |
| 2018-10-05 | 4790-803-1230 | 1.20 ppb |
| 2018-10-05 | 4790-804-1255 | 0.600 ppb |
| 2019-01-14 | 4790-801-0936 | 1.40 ppb |
| 2019-01-14 | 4790-802-0906 | ND |
| 2019-01-14 | 4790-803-1003 | ND |
| 2019-01-14 | 4790-804-0746 | ND |
| 2019-04-22 | 4790-009-1125 | ND |
| 2019-04-22 | 4790-010-1040 | ND |
| 2019-04-22 | 4790-012-1010 | 0.930 ppb |
| 2019-04-22 | 4790-018-1145 | ND |
| 2019-04-22 | 4790-019-1320 | ND |
| 2019-04-22 | 4790-020-1130 | ND |
| 2019-04-22 | 4790-801-1255 | 0.710 ppb |
| 2019-04-22 | 4790-802-1100 | 2.20 ppb |
| 2019-04-22 | 4790-803-1340 | 0.730 ppb |
| 2019-04-22 | 4790-804-1025 | 4.60 ppb |
| 2019-07-15 | 4790-801-0910 | ND |
| 2019-07-15 | 4790-802-1120 | ND |
| 2019-07-15 | 4790-803-1145 | ND |
| 2019-07-15 | 4790-804-1100 | ND |
| 2019-10-07 | 5810-801-0730 | 1.10 ppb |
| 2019-10-07 | 5810-802-0900 | ND |
| 2019-10-07 | 5810-803-0800 | ND |
| 2019-10-07 | 5810-804-0830 | ND |